Published: 11-May-2011

2007.0 Range Rover Sport (LS), 204-06

Ride and Handling Optimization

Active Stabilization System (G839489)

DIAGNOSIS AND TESTING
Overview

Active stabilization is also known as dynamic response, active roll control or active cornering enhancement, and refers to the control of the front and rear stabilizer (or anti-roll) bars.

For information on the description and operation of the system: REFER to: Active Stabilization System (204-06 Ride and Handling Optimization, Description and Operation).

Inspection and Verification
  1. Verify the customer concern.
  1. Visually inspect for obvious mechanical or electrical faults.
MechanicalElectrical
  • Fluid level/condition, pipes, reservoir, etc
  • Pump and pulley
  • Drive belt condition
  • Hoses
  • Valve block
  • Accelerometers (correct fitment, etc)
  • Tire condition, pressures, etc
  • Suspension components (correct fitment, damage, etc)
  • Fuses (battery junction box)
  • Engine control module (ECM) relay
  • Harnesses/Connectors
  • Upper accelerometer
  • Lower accelerometer
  • Steering wheel rotation sensor
  • Dynamic response control module
  • Air suspension control module
  • ABS control module
  • Instrument cluster module
  • Transmission control module (TCM)
  • Controller area network (CAN) circuits
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. Use the approved diagnostic system or a scan tool to retrieve any diagnostic trouble codes (DTCs) before moving onto the symptom chart or DTC index.
      • Because the DTCs are stored in more than one module, a complete vehicle read is recommended
      • Make sure that all DTCs are cleared following rectification
Symptom chart
SymptomPossible causeAction
Poor on-center response
  • System bleed required
  • Stabilizer bar bushes
  • Residual pressure
  • Steering angle sensor offset
  • Control module adaptive data
Carry out the manual bleed procedure. REFER to: Active Stabilization System Bleeding (204-06 Ride and Handling Optimization, General Procedures). Check the stabilizer bar bushes. REFER to: Front Stabilizer Bar (204-06 Ride and Handling Optimization, Removal and Installation) / Rear Stabilizer Bar (204-06 Ride and Handling Optimization, Removal and Installation). Check for residual pressure in the system. Check and calibrate the steering angle sensor, clear the adaptive data after calibration. REFER to: Steering Angle Sensor (211-02 Power Steering, Removal and Installation).
Asymmetrical response
  • Steering angle sensor offset
  • Accelerometer calibration
  • System bleed required
Check and calibrate the steering angle sensor, clear the adaptive data after calibration. REFER to: Steering Angle Sensor (211-02 Power Steering, Removal and Installation). Calibrate the accelerometers using the approved diagnostic system. Carry out the manual bleed procedure. REFER to: Active Stabilization System Bleeding (204-06 Ride and Handling Optimization, General Procedures).
Excessive roll
  • System bleed required
  • Stabilizer bar bushes
  • Stabilizer bar drop-links
Carry out the manual bleed procedure. REFER to: Active Stabilization System Bleeding (204-06 Ride and Handling Optimization, General Procedures). Check the stabilizer bar bushes and drop links. REFER to: Front Stabilizer Bar (204-06 Ride and Handling Optimization, Removal and Installation) / Rear Stabilizer Bar (204-06 Ride and Handling Optimization, Removal and Installation).
Powered roll-rock
  • Harness faults
  • Valve block fault
  • Control module adaptive data
  • Accelerometer fault
Check for DTCs indicating any of the possible causes are present.
Oversteer or understeer
  • Stabilizer bar drop-links
  • System actuators
Check the stabilizer bar drop links and the system actuators. REFER to: Front Stabilizer Bar (204-06 Ride and Handling Optimization, Removal and Installation) / Rear Stabilizer Bar (204-06 Ride and Handling Optimization, Removal and Installation).
DTC index
NOTE:

Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).

DTCDescriptionPossible causesAction
B1A8700Battery disconnection/control module reset
  • Loss of power to the dynamic response control module while the vehicle is in motion
Check the harness and connectors, check the EMS relay, check the ground connections.
C111122Control lateral acceleration
  • Internal control module calculation fault
Check for associated codes giving more information. Refer to the warranty policy and procedures manual if a module is suspect.
C111127Control lateral acceleration
  • Intermittent lower lateral accelerometer signal
  • Lower lateral accelerometer fault
  • Internal control module calculation fault
Check for associated codes giving more information. Carry out the accelerometer tests using the approved diagnostic system.
C111200Roll angle
  • Internal control module calculation fault
Check for associated codes giving more information. Refer to the warranty policy and procedures manual if a module is suspect.
C111229Roll angle
  • Internal control module calculation fault
Check for associated codes giving more information. Refer to the warranty policy and procedures manual if a module is suspect.
C111300Off-Road determination
  • Internal control module calculation fault
Check for associated codes giving more information. Refer to the warranty policy and procedures manual if a module is suspect.
C111400Roll axis torque
  • Internal control module calculation fault
Check for associated codes giving more information. Refer to the warranty policy and procedures manual if a module is suspect.
C111629Torque/Pressure
  • Internal control module calculation fault
Check for associated codes giving more information. Refer to the warranty policy and procedures manual if a module is suspect.
C111729Direction control valve(s)
  • Internal control module calculation fault
Check for associated codes giving more information. Refer to the warranty policy and procedures manual if a module is suspect.
C111771Direction control valve(s)
  • Sticking direction control valves
Install a new valve block. REFER to: Valve Block (204-06 Ride and Handling Optimization, Removal and Installation).
C111795Direction control valve(s)
  • Incorrect connection of the pressure control and direction control valves
  • Damaged direction control valve
  • High resistance harness/connectors
Check the valve connections and rectify as necessary. Check the direction control valves. Check the harnesses and connectors.
C111909Hydraulic pressure
  • Low fluid
  • Leak in high pressure primary circuit
  • Leaking reservoir
  • Leak in secondary circuit
  • Direction control valves stuck open
  • Pressure control valve fault
  • Pressure transducer fault
  • Blocked filter
  • Actuator fault
Check and top up the fluid. Rectify leaks as necessary. For sticking/faulty valves, install a new valve block. REFER to: Valve Block (204-06 Ride and Handling Optimization, Removal and Installation). For a pressure transducer fault, install a new pressure transducer. REFER to: Valve Block Transducer (204-06 Ride and Handling Optimization, Removal and Installation). Install a new filter as necessary. REFER to: Valve Block Filter (204-06 Ride and Handling Optimization, Removal and Installation). Check the system actuators.
C111962Hydraulic pressure
  • Low fluid
  • Leak in high pressure primary circuit
  • Leaking reservoir
  • Leak in secondary circuit
  • Direction control valves stuck open
  • Pressure control valve fault
  • Pressure transducer fault
  • Blocked filter
  • Actuator fault
  • Broken drop link
  • Broken stabilizer bar
  • Air in system
Check and top up the fluid. Rectify leaks as necessary. For sticking/faulty valves, install a new valve block. REFER to: Valve Block (204-06 Ride and Handling Optimization, Removal and Installation). For a pressure transducer fault, install a new pressure transducer. REFER to: Valve Block Transducer (204-06 Ride and Handling Optimization, Removal and Installation). Install a new filter as necessary. REFER to: Valve Block Filter (204-06 Ride and Handling Optimization, Removal and Installation). Check the system actuators. Install new drop links or stabilizer bars as necessary. REFER to: Front Stabilizer Bar (204-06 Ride and Handling Optimization, Removal and Installation) / Rear Stabilizer Bar (204-06 Ride and Handling Optimization, Removal and Installation). Carry out the manual bleed procedure. REFER to: Active Stabilization System Bleeding (204-06 Ride and Handling Optimization, General Procedures).
C11197BHydraulic pressure
  • Low fluid
  • Leak in high pressure primary circuit
  • Leaking reservoir
  • Leak in secondary circuit
  • Blocked filter
  • Low pump flow
  • Blocked or kinked suction hose
Check and top up the fluid. Rectify leaks as necessary. Install a new filter as necessary. REFER to: Valve Block Filter (204-06 Ride and Handling Optimization, Removal and Installation). Check and replace the pump as necessary. REFER to: Fluid Pump - V8 N/A 4.4L Petrol/V8 S/C 4.2L Petrol (204-06 Ride and Handling Optimization, Removal and Installation). Check the suction hose, rectify as necessary.
C111991Hydraulic pressure
  • Pressure control valve fault
  • Contaminated fluid
  • Kinked or blocked return pipe
  • Pressure transducer fault
For sticking/faulty valves, install a new valve block. REFER to: Valve Block (204-06 Ride and Handling Optimization, Removal and Installation). Clean the system, replace the fluid. Check and replace the return pipe as necessary. For a pressure transducer fault, install a new pressure transducer. REFER to: Valve Block Transducer (204-06 Ride and Handling Optimization, Removal and Installation).
C1A0001Dynamic response control module
  • Harness fault
  • Damaged isolation switch
Check the control module harness. Refer to the electrical guides.
C1A0004Dynamic response control module
  • Internal control module fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0043Dynamic response control module
  • Internal control module fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0045Dynamic response control module
  • Internal control module fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0047Dynamic response control module
  • Internal control module fault
Refer to the warranty policy and procedures manual if a module is suspect.
C1A0052Dynamic response control module
  • New control module
Configure the new module using the approved diagnostic system
C1A0054Dynamic response control module
  • New control module
Configure the new module using the approved diagnostic system
C1A0916Pressure transducer signal
  • Pressure transducer signal circuit: short circuit to ground
  • Pressure transducer fault
Check the pressure transducer circuit, rectify as necessary. Install a new pressure transducer as necessary. REFER to: Valve Block Transducer (204-06 Ride and Handling Optimization, Removal and Installation).
C1A0917Pressure transducer signal
  • Pressure transducer signal circuit: short circuit to power
  • Pressure transducer fault
Check the pressure transducer circuit, rectify as necessary. Install a new pressure transducer as necessary. REFER to: Valve Block Transducer (204-06 Ride and Handling Optimization, Removal and Installation).
C1A091CPressure transducer signal
  • Pressure control valve circuit: short circuit to power
  • Pressure control valve fault
  • Pressure transducer fault
For sticking/faulty valves, install a new valve block. REFER to: Valve Block (204-06 Ride and Handling Optimization, Removal and Installation). Install a new pressure transducer as necessary. REFER to: Valve Block Transducer (204-06 Ride and Handling Optimization, Removal and Installation).
C1A0926Pressure transducer signal
  • Low fluid
  • Pressure transducer fault
  • Blocked filter
Check and top up the fluid. Install a new filter as necessary. REFER to: Valve Block Filter (204-06 Ride and Handling Optimization, Removal and Installation). Install a new pressure transducer as necessary. REFER to: Valve Block Transducer (204-06 Ride and Handling Optimization, Removal and Installation).
C1A9762Lateral accelerometer circuit
  • Damaged accelerometers
  • Bent brackets
Check the accelerometers and brackets. Rectify as necessary.
C1B0312Directional control valve 1
  • Directional control valve 1 circuit: short circuit/very low resistance
  • Directional control valve 1 circuit: short circuit to power
Check the directional control valve circuit. For sticking/faulty valves, install a new valve block. REFER to: Valve Block (204-06 Ride and Handling Optimization, Removal and Installation).
C1B0314Directional control valve 1
  • Directional control valve 1 circuit: short circuit to ground
Check the directional control valve circuit. Refer to the electrical guides.
C1B0318Directional control valve 1
  • Directional control valve 1 circuit: high resistance
Check the directional control valve circuit. Refer to the electrical guides.
C1B0319Directional control valve 1
  • Directional control valve 1 circuit: very low resistance
  • Directional control valve 1 circuit: short circuit to power
Check the directional control valve circuit. Refer to the electrical guides.
C1B031DDirectional control valve 1
  • Directional control valve 1 circuit: high resistance
Check the directional control valve circuit. Refer to the electrical guides.
C1B0400Hit current directional control valve 1
  • Directional control valve 1 circuit: high resistance
Check the directional control valve circuit. Refer to the electrical guides.
C1B0500Hold current directional control valve 1
  • Directional control valve 1 circuit: high resistance
  • Air in system
Check the directional control valve circuit. Carry out the manual bleed procedure. REFER to: Active Stabilization System Bleeding (204-06 Ride and Handling Optimization, General Procedures).
C1B0600Off current directional control valve 1
  • Directional control valve 1 circuit: short circuit to other circuits
Check the directional control valve circuit with the control module connector disconnected. Refer to the electrical guides.
C1B0712Directional control valve 2
  • Directional control valve 2 circuit: short circuit/very low resistance
  • Directional control valve 2 circuit: short circuit to power
Check the directional control valve circuit. For sticking/faulty valves, install a new valve block. REFER to: Valve Block (204-06 Ride and Handling Optimization, Removal and Installation).
C1B0714Directional control valve 2
  • Directional control valve 2 circuit: short circuit to ground
Check the directional control valve circuit. Refer to the electrical guides.
C1B0718Directional control valve 2
  • Directional control valve 2 circuit: high resistance
Check the directional control valve circuit. Refer to the electrical guides.
C1B0719Directional control valve 2
  • Directional control valve 2 circuit: very low resistance
  • Directional control valve 2 circuit: short circuit to power
Check the directional control valve circuit. Refer to the electrical guides.
C1B071DDirectional control valve 2
  • Directional control valve 2 circuit: high resistance
Check the directional control valve circuit. Refer to the electrical guides.
C1B0800Hit current directional control valve 2
  • Directional control valve 2 circuit: high resistance
Check the directional control valve circuit. Refer to the electrical guides.
C1B0900Hold current directional control valve 2
  • Directional control valve 2 circuit: high resistance
  • Air in system
Check the directional control valve circuit. Carry out the manual bleed procedure. REFER to: Active Stabilization System Bleeding (204-06 Ride and Handling Optimization, General Procedures).
C1B1000Off current directional control valve 2
  • Directional control valve 2 circuit: short circuit to other circuits
Check the directional control valve circuit with the control module connector disconnected. Refer to the electrical guides.
C1B1112Pressure control valve (PCV)
  • PCV circuit: very low resistance
  • PCV circuit: short circuit to power
Check the PCV circuit. Refer to the electrical guides.
C1B1114Pressure control valve (PCV)
  • PCV circuit: short circuit to ground
Check the PCV circuit. Refer to the electrical guides.
C1B1118Pressure control valve (PCV)
  • PCV circuit: high resistance
Check the PCV circuit. Refer to the electrical guides.
C1B1119Pressure control valve (PCV)
  • PCV circuit: very low resistance
  • PCV circuit: short circuit to power
Check the PCV circuit. Refer to the electrical guides.
C1B111DPressure control valve (PCV)
  • PCV circuit: high resistance
Check the PCV circuit. Refer to the electrical guides.
C1B1162Pressure control valve (PCV)
  • Low/Contaminated fluid
  • PCV fault
  • Low flow/low pressure pump
  • Pressure transducer fault
  • Air in system
Check fluid level and condition. For sticking/faulty valves, install a new valve block. REFER to: Valve Block (204-06 Ride and Handling Optimization, Removal and Installation). Check the pump operation and hoses, rectify as necessary. Install a new pressure transducer as necessary. REFER to: Valve Block Transducer (204-06 Ride and Handling Optimization, Removal and Installation). Carry out the manual bleed procedure. REFER to: Active Stabilization System Bleeding (204-06 Ride and Handling Optimization, General Procedures).
C1B1164Pressure control valve (PCV)
  • PCV circuit: high resistance
Check the PCV circuit. Refer to the electrical guides.
C1B1212Lower lateral accelerometer circuit
  • Lower lateral accelerometer signal circuit: short circuit to other circuit or power
Check the lower lateral accelerometer circuit. Refer to the electrical guides.
C1B1214Lower lateral accelerometer circuit
  • Lower lateral accelerometer signal circuit: short circuit to other circuit or ground
  • Lower lateral accelerometer fault
Check the lower lateral accelerometer circuit. Carry out the accelerometer tests using the approved diagnostic system. Install a new lower lateral accelerometer as necessary. REFER to: Lower Accelerometer (204-06 Ride and Handling Optimization, Removal and Installation).
C1B1222Lower lateral accelerometer circuit
  • Lower lateral accelerometer loose
  • Lower lateral accelerometer signal circuit: short circuit to other circuit or ground
  • Lower lateral accelerometer fault
Check the lower lateral accelerometer fitment, rectify as necessary. Check the lower lateral accelerometer circuit. Carry out the accelerometer tests using the approved diagnostic system. Install a new lower lateral accelerometer as necessary. REFER to: Lower Accelerometer (204-06 Ride and Handling Optimization, Removal and Installation).
C1B1226Lower lateral accelerometer circuit
  • Lower lateral accelerometer signal circuit: short circuit to other circuit
  • Lower lateral accelerometer fault
Check the lower lateral accelerometer circuit. Carry out the accelerometer tests using the approved diagnostic system. Install a new lower lateral accelerometer as necessary. REFER to: Lower Accelerometer (204-06 Ride and Handling Optimization, Removal and Installation).
C1B1228Lower lateral accelerometer circuit
  • Lower lateral accelerometer mounting damaged
  • Lower lateral accelerometer loose
  • Lower lateral accelerometer fault
Check the lower lateral accelerometer fitment, rectify as necessary. Carry out the accelerometer tests using the approved diagnostic system. Install a new lower lateral accelerometer as necessary. REFER to: Lower Accelerometer (204-06 Ride and Handling Optimization, Removal and Installation).
C1B1276Lower lateral accelerometer circuit
  • Lower lateral accelerometer mounting damaged
  • Lower lateral accelerometer fault
Check the lower lateral accelerometer fitment, rectify as necessary. Carry out the accelerometer tests using the approved diagnostic system. Install a new lower lateral accelerometer as necessary. REFER to: Lower Accelerometer (204-06 Ride and Handling Optimization, Removal and Installation).
C1B1312Upper lateral accelerometer circuit
  • Upper lateral accelerometer signal circuit: short circuit to other circuit or power
  • Upper lateral accelerometer fault
Check the upper accelerometer circuit. Carry out the accelerometer tests using the approved diagnostic system. Install a new upper lateral accelerometer as necessary. REFER to: Upper Accelerometer (204-06 Ride and Handling Optimization, Removal and Installation).
C1B1314Upper lateral accelerometer circuit
  • Upper lateral accelerometer signal circuit: short circuit to other circuit or ground
  • Upper lateral accelerometer fault
Check the upper accelerometer circuit. Carry out the accelerometer tests using the approved diagnostic system. Install a new upper lateral accelerometer as necessary. REFER to: Upper Accelerometer (204-06 Ride and Handling Optimization, Removal and Installation).
C1B1322Upper lateral accelerometer circuit
  • Upper lateral accelerometer loose
  • Upper lateral accelerometer signal circuit: short circuit to other circuit
  • Upper lateral accelerometer fault
Check the upper lateral accelerometer fitment, rectify as necessary. Check the upper accelerometer circuit. Carry out the accelerometer tests using the approved diagnostic system. Install a new upper lateral accelerometer as necessary. REFER to: Upper Accelerometer (204-06 Ride and Handling Optimization, Removal and Installation).
C1B1326Upper lateral accelerometer circuit
  • Upper lateral accelerometer signal circuit: short circuit to other circuit
  • Upper lateral accelerometer fault
Check the upper accelerometer circuit. Carry out the accelerometer tests using the approved diagnostic system. Install a new upper lateral accelerometer as necessary. REFER to: Upper Accelerometer (204-06 Ride and Handling Optimization, Removal and Installation).
C1B1328Upper lateral accelerometer circuit
  • Upper lateral accelerometer mounting damaged
  • Upper lateral accelerometer loose
  • Upper lateral accelerometer fault
Check the upper lateral accelerometer fitment, rectify as necessary. Carry out the accelerometer tests using the approved diagnostic system. Install a new upper lateral accelerometer as necessary. REFER to: Upper Accelerometer (204-06 Ride and Handling Optimization, Removal and Installation).
C1B1376Upper lateral accelerometer circuit
  • Upper lateral accelerometer mounting damaged
  • Upper lateral accelerometer fault
Check the upper lateral accelerometer fitment, rectify as necessary. Carry out the accelerometer tests using the approved diagnostic system. Install a new upper lateral accelerometer as necessary. REFER to: Upper Accelerometer (204-06 Ride and Handling Optimization, Removal and Installation).
C1B141CSensor supply 1
  • Lower lateral accelerometer or pressure transducer supply circuit: short circuit to other circuit or ground
  • Lower lateral accelerometer fault
  • Pressure transducer fault
Check the lower accelerometer and pressure transducer circuits. Carry out the accelerometer tests using the approved diagnostic system. Install a new lower lateral accelerometer as necessary. REFER to: Lower Accelerometer (204-06 Ride and Handling Optimization, Removal and Installation). Install a new pressure transducer as necessary. REFER to: Valve Block Transducer (204-06 Ride and Handling Optimization, Removal and Installation).
C1B151CSensor supply 2
  • Upper lateral accelerometer supply circuit: short circuit to other circuit or ground
  • Upper lateral accelerometer fault
Check the upper lateral accelerometer circuits. Carry out the accelerometer tests using the approved diagnostic system. Install a new upper lateral accelerometer as necessary. REFER to: Upper Accelerometer (204-06 Ride and Handling Optimization, Removal and Installation).
C1B181CControl module supply voltage cross-reference check
  • Control module supply circuit: high resistance
  • Charging system fault
Check the control module power and ground circuits. Check for charging system DTCs, rectify as necessary. REFER to: Charging System (414-00 Battery and Charging System - General Information, Diagnosis and Testing).
P14529Calculated torque error
  • Internal control module calculation failure
Check for associated codes giving more information. Refer to the warranty policy and procedures manual if a module is suspect.
U007388Control module communication bus off
  • CAN circuit fault
  • CAN module fault
  • Dynamic response module fault
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
U010087Lost communication with the engine control module (ECM)
  • ECM CAN message not received in the specified time
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
U010187Lost communication with the transmission control module (TCM)
  • TCM CAN message not received in the specified time
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
U010287Lost communication with the transfer case control module (TCCM)
  • TCCM CAN message not received in the specified time
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
U012287Lost communication with the anti-lock brake (ABS) module
  • ABS module CAN message not received in the specified time
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
U012687Lost communication with the steering wheel rotation sensor
  • Steering wheel rotation sensor CAN message not received in the specified time
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
U013287Lost communication with the air suspension control module
  • Air suspension control module CAN message not received in the specified time
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
U015587Lost communication with the instrument cluster module
  • Instrument cluster module CAN message not received in the specified time
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
U030055Module configuration does not match the vehicle configuration
  • Dynamic response module incorrectly configured
Configure the module using the approved diagnostic system.
U040181Invalid data received from the ECM
  • ECM fault
Check for CAN or module DTCs. Check the power and ground circuits to the ECM, rectify as necessary.
U040281Invalid data received from the TCM
  • TCM fault
Check for CAN or module DTCs. Check the power and ground circuits to the TCM, rectify as necessary.
U040381Invalid data received from the TCCM
  • TCCM fault
Check for CAN or module DTCs. Check the power and ground circuits to the TCCM, rectify as necessary.
U041681Invalid data received from the ABS module
  • ABS module fault
Check for CAN or module DTCs. Check the power and ground circuits to the ABS module, rectify as necessary.
U042181Invalid data received from the air suspension control module
  • Air suspension control module fault
Check for CAN or module DTCs. Check the power and ground circuits to the air suspension control module, rectify as necessary.
U042881Invalid data received from the steering wheel rotation sensor
  • Steering wheel rotation sensor fault
Check for CAN or module DTCs. Check the power and ground circuits to the steering wheel rotation sensor, rectify as necessary.
U042885Invalid data received from the steering wheel rotation sensor
  • Steering wheel rotation sensor out of calibration
  • Steering wheel rotation sensor fault
Calibrate the steering wheel rotation sensor using the approved diagnostic system. Check for CAN or module DTCs. Check the power and ground circuits to the steering wheel rotation sensor, rectify as necessary.
U042886Invalid data received from the steering wheel rotation sensor
  • Steering wheel rotation sensor out of calibration
  • Wheels out of alignment
  • Steering wheel rotation sensor fault
Calibrate the steering wheel rotation sensor using the approved diagnostic system. Check the wheel alignment, adjust as necessary. REFER to: Four-Wheel Alignment (204-00 Suspension System - General Information, General Procedures). Check for CAN or module DTCs. Check the power and ground circuits to the steering wheel rotation sensor, rectify as necessary.
U1A0400Vehicle speed CAN signal
  • ABS module fault
Check for CAN or module DTCs. Check the power and ground circuits to the ABS module, rectify as necessary.
U1A1086Ignition status CAN signal
  • Lost communications
Check for associated codes giving more information. Refer to the warranty policy and procedures manual if a module is suspect.
U1A1449CAN initialization failure
  • Dynamic response module internal fault
Refer to the warranty policy and procedures manual if a module is suspect.
U200798Valve(s)
  • Restricted filter
  • Restricted high pressure or return line pipework
  • Damaged pump
  • Contaminated fluid
  • Continuous use at high lateral acceleration
Check the filter and pipework. Check the pump, rectify as necessary. Check the fluid condition, replace and clean as necessary. Investigate the driving profile.