DIAGNOSIS AND TESTING

Overview

The diagnosis of the seats can be separated into three main areas, seat movement, memory and seat heating.

Seat heating is controlled by the automatic temperature control module, so there will be some cross-over with the climate control section as far as diagnostic trouble codes (DTCs) are concerned.

There are a number of linked systems, such as the mirror and steering column movement which will also be covered in this section.

For information on the description and operation of the systems, refer to the relevant section of the workshop manual.

Inspection and Verification

Verify the customer concern.

Visually inspect for obvious mechanical or electrical faults.

Visual inspection

Mechanical	Electrical
Seat runners Seat frames Seat movement switch condition and installation Seat heater switch condition and installation Seat motor(s) condition and installation Steering column switch condition and installation Steering column condition and installation Door mirror switch condition and installation Door mirror condition and installation	Battery condition and state of charge Fuses Harnesses and connectors Seat movement switch(es) Seat heater switch(es) Seat heater elements Seat motor(s) Seat module(s) Memory control module(s) Steering column switch Steering column motor Door mirror switch(es) Door mirror motor(s) Ignition switch Battery junction box (BJB) Central junction box (CJB) Local interconnect network (LIN) circuit

Mechanical

Electrical

Seat runners
Seat frames
Seat movement switch condition and installation
Seat heater switch condition and installation
Seat motor(s) condition and installation
Steering column switch condition and installation
Steering column condition and installation
Door mirror switch condition and installation
Door mirror condition and installation

Battery condition and state of charge
Fuses
Harnesses and connectors
Seat movement switch(es)
Seat heater switch(es)
Seat heater elements
Seat motor(s)
Seat module(s)
Memory control module(s)
Steering column switch
Steering column motor
Door mirror switch(es)
Door mirror motor(s)
Ignition switch
Battery junction box (BJB)
Central junction box (CJB)
Local interconnect network (LIN) circuit

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

Use the approved diagnostic system or a scan tool to retrieve any DTCs before moving onto the symptom chart or DTC index.

Symptom chart

NOTE:

References to seat movement refer to either front seat.

Symptom	Possible causes	Action
Seat does not move when the switch is operated (forward, backward, tilt, etc)	Runner or mechanism jammed Switch fault Motor fault Thermal cut-out engaged Circuit fault Module fault	Check for obstructions at the seat runners, mechanisms, etc, rectify as necessary. The thermal cut-out may engage if there is a motor or mechanism fault. Check for DTCs indicating a switch, motor or module fault.
Steering column does not move when the switch is operated	Switch fault Motor fault Clutch/Solenoid fault	Check for DTCs indicating a switch, motor or clutch/solenoid fault.
Mirrors do not move when the switch is operated	Mechanical fault Switch fault Motor fault Circuit fault: high resistance Circuit fault: short circuit to ground	For mirror tests, refer to the relevant section of the workshop manual.
Memorized seat/steering column/mirror position is not resumed	Battery voltage below 10.5 volts Position not stored Switch operated during "one-touch" memory recall EEPROM fault	Before condemning a memory component, check the function from the switch and refer to the symptoms above. Make sure the battery voltage is adequate. Make sure that the desired position is correctly stored. Make sure that the memory store/recall procedure is being followed. Refer to the relevant section of the workshop manual.
"Lazy entry" function inoperative	Remote transmitter fault (battery, transmitter programming, etc) See list for "position is not resumed"	Check that the remote transmitter operates the central locking, etc. If it does, the fault is not with the transmitter. Refer to "position is not resumed".
Entry/Exit mode inoperative	Switch not in AUTO mode Switch fault Motor fault Clutch/Solenoid fault	Make sure the function is enabled and that the switch is correctly set. Check for DTCs indicating a switch, motor or clutch/solenoid fault.
Seat does not get warm	Switch fault Fuses Circuit fault Temperature sensor Battery voltage is greater than 16.5 volts	Check the LEDs at the switches as a quick check of the switch function. If the LEDs illuminate when the switches are operated, there is power to the switches and the switches are operating at least one level. Check the seat heater circuits, refer to the electrical guides. Check the temperature sensor function. If the battery voltage is higher than 16.5 volts for more than 5 seconds, seat heating is suspended. Refer to the relevant section of the workshop manual.
Part(s) of the seat do not get warm	Element fault	There are up to three elements in each seat, if the rest of the seat operates normally, check the element connections and continuity. Refer to the electrical guides.

DTC index

NOTES:

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).
For a full list of seat heating function DTCs, refer to section 412-00 - Climate Control in the workshop manual. For additional DTCs, refer to section 418-00 - Network Communications in the workshop manual.

DTC	Description	Possible causes	Action
B1A7318	Left Hand Seat Heater	Left-hand seat heater power supply high resistance Left-hand seat heater power supply short circuit to ground	Check the left-hand seat heater switch and circuit. Refer to the electrical guides.
B1A7418	Right Hand Seat Heater	Right-hand seat heater power supply current below threshold	Check the right-hand seat heater switch and circuit. Refer to the electrical guides.
B1B6511	Left Hand Seat Heater Temperature Sensor	Left-hand seat heater temperature signal short circuit to ground	Check the seat heater temperature signal circuit. Refer to the electrical guides. Refer to the relevant section of the workshop manual.
B1B6515	Left Hand Seat Heater Temperature Sensor	Left-hand seat heater temperature signal high resistance Left-hand seat heater temperature signal short circuit to power	Check the seat heater temperature signal circuit. Refer to the electrical guides. Refer to the relevant section of the workshop manual.
B1B6611	Right Hand Seat Heater Temperature Sensor	Right-hand seat heater temperature signal short circuit to ground	Check the seat heater temperature signal circuit. Refer to the electrical guides. Refer to the relevant section of the workshop manual.
B1B6615	Right Hand Seat Heater Temperature Sensor	Right-hand seat heater temperature signal high resistance Right-hand seat heater temperature signal short circuit to power Right-hand seat heater power supply high resistance Right-hand seat heater power supply short circuit to ground	Check the seat heater temperature signal circuit. Refer to the electrical guides. Refer to the relevant section of the workshop manual.
B1B8541	Memory Control Module	Seat module error	Renew the seat memory control module. Refer to the warranty policy and procedures manual if a module is suspect.
B1B8549	Memory Control Module	Seat module error	If no customer complaint issue exists with seat operation, no action necessary, clear/ignore DTC. If seat functionality is affected, renew module. Refer to the warranty policy and procedures manual if a module is suspect.
B1B8587	Memory Control Module	No response from seat memory control module	Seat memory is not installed to all variants (optional). Fault logging is inhibited by the CCF, but an incorrectly configured CCF could give erroneous DTC logging. Repair action only required for vehicles with sunroof installed. Where necessary refer to the lost communication statement at the start of this table.
B1B8673	Seat Height Motor Relay	Memory control module internal relay fault (stuck on)	Renew the seat memory control module. Refer to the warranty policy and procedures manual if a module is suspect.
B1B8693	Seat Height Motor Relay	Software error Memory control module internal relay fault (inoperative)	If no customer complaint issue exists with seat operation, no action necessary, clear/ignore DTC. If seat functionality is incorrect check/renew the control module as necessary. Refer to the warranty policy and procedures manual if a module is suspect.
B1B8731	Seat Height Motor Speed/Position Sensor	Wiring circuit/connector issue Seat height motor speed/position sensor fault	Refer to the electrical guides and check the harness and connections between the seat memory module and the seat height motor. Repair/renew as necessary. If no circuit fault is found check/renew the seat height motor.
B1B873A	Seat Height Motor Speed/Position Sensor	Seat height moved beyond expected range Sensor circuit open or short circuit Seat adjustment range issue Seat height motor speed/position sensor fault	Refer to the electrical guides and check the harness and connections between the seat memory module and the seat height motor. Repair/renew as necessary. Check the seat adjustment ranges to ensure correct operation. Renew the seat height motor.
B1B8873	Seat Height Motor Relay	Memory control module internal relay fault (stuck on)	Renew the seat memory control module. Refer to the warranty policy and procedures manual if a module is suspect.
B1B8893	Seat Slide Motor Relay	Software error Memory control module internal relay fault (inoperative)	If no customer complaint issue exists with seat operation, no action necessary, clear/ignore DTC. If seat functionality is incorrect check/renew the control module as necessary.
B1B8931	Seat Slide Motor Speed/Position Sensor	Wiring circuit/connector issue Seat slide motor speed/position sensor fault	Refer to the electrical guides and check the harness and connections between the seat memory module and the seat slide motor. Repair/renew as necessary. If no circuit fault is found check/renew the seat slide motor.
B1B893A	Seat Slide Motor Speed/Position Sensor	Seat slide moved beyond expected range Sensor circuit open or short circuit Seat adjustment range issue Seat slide motor speed/position sensor fault	Refer to the electrical guides and check the harness and connections between the seat memory module and the seat slide motor. Repair/renew as necessary. Check the seat adjustment ranges to ensure correct operation. Renew the seat slide motor.
B1B9073	Seat Tilt Motor Relay	Memory control module internal relay fault (stuck on)	Renew the seat memory control module. Refer to the warranty policy and procedures manual if a module is suspect.
B1B9093	Seat Tilt Motor Relay	Software error Memory control module internal relay fault (inoperative)	If no customer complaint issue exists with seat operation, no action necessary, clear/ignore DTC. If seat functionality is incorrect check/renew the control module as necessary.
B1B9131	Seat Tilt Motor Speed/Position Sensor	Wiring circuit/connector issue Seat tilt motor speed/position sensor fault	Refer to the electrical guides and check the harness and connections between the seat memory module and the seat tilt motor. Repair/renew as necessary. If no circuit fault is found check/renew the seat tilt motor.
B1B913A	Seat Tilt Motor Speed/Position Sensor	Seat tilt moved beyond expected range Sensor circuit open or short circuit Seat adjustment range issue Seat tilt motor speed/position sensor fault	Refer to the electrical guides and check the harness and connections between the seat memory module and the seat tilt motor. Repair/renew as necessary. Check the seat adjustment ranges to ensure correct operation. Renew the seat tilt motor.
B1B9273	Seat Recline Motor Relay	Memory control module internal relay fault (stuck on)	Renew the seat memory control module. Refer to the warranty policy and procedures manual if a module is suspect.
B1B9293	Seat Recline Motor Relay	Software error Memory control module internal relay fault (inoperative)	If no customer complaint issue exists with seat operation, no action necessary, clear/ignore DTC. If seat functionality is incorrect check/renew the control module as necessary.
B1B9331	Seat Recline Motor Speed/Position Sensor	Wiring circuit/connector issue Seat recline motor speed/position sensor fault	Refer to the electrical guides and check the harness and connections between the seat memory module and the seat recline motor. Repair/renew as necessary. If no circuit fault is found check/renew the seat recline motor.
B1B933A	Seat Recline Motor Speed/Position Sensor	Seat recline moved beyond expected range Sensor circuit open or short circuit Seat adjustment range issue Seat recline motor speed/position sensor fault	Refer to the electrical guides and check the harness and connections between the seat memory module and the seat recline motor. Repair/renew as necessary. Check the seat adjustment ranges to ensure correct operation. Renew the seat recline motor.
B1B9473	Seat Height Up Switch	Seat height up switch stuck Seat height up switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the seat switch pack for short to ground. Check the switch operation, renew as necessary.
B1B9573	Seat Height Down Switch	Seat height down switch stuck Seat height down switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the seat switch pack for short to ground. Check the switch operation, renew as necessary.
B1B9673	Seat Slide Forward Switch	Seat slide forward switch stuck Seat slide forward switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the seat switch pack for short to ground. Check the switch operation, renew as necessary.
B1B9773	Seat Slide Backward Switch	Seat slide backward switch stuck Seat slide backward switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the seat switch pack for short to ground. Check the switch operation, renew as necessary.
B1B9873	Seat Tilt Up Switch	Seat tilt up switch stuck Seat tilt up switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the seat switch pack for short to ground. Check the switch operation, renew as necessary.
B1B9973	Seat Tilt Down Switch	Seat tilt down switch stuck Seat tilt down switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the seat switch pack for short to ground. Check the switch operation, renew as necessary.
B1C0073	Seat Recline Up Switch	Seat recline up switch stuck Seat recline up switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the seat switch pack for short to ground. Check the switch operation, renew as necessary.
B1C0173	Seat Recline Down Switch	Seat recline down switch stuck Seat recline down switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the seat switch pack for short to ground. Check the switch operation, renew as necessary.
B1C0273	Memory Store Switch	Seat memory store switch stuck Seat memory store switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the seat switch pack for short to ground. Check the switch operation, renew as necessary.
B1C0373	Memory #1 Switch	Seat memory #1 switch stuck Seat memory #1 switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the seat switch pack for short to ground. Check the switch operation, renew as necessary.
B1C0473	Memory #2 Switch	Seat memory #2 switch stuck Seat memory #2 switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the seat switch pack for short to ground. Check the switch operation, renew as necessary.
B1C0573	Memory #3 Switch	Seat memory #3 switch stuck Seat memory #3 switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the seat switch pack for short to ground. Check the switch operation, renew as necessary.
B1C0601	Driver Up/Down And Common Mirror Motor Circuit	Mirror motor up/down circuit open or short circuit Mirror up/down motor failure	Refer to the electrical guides and check the circuit between the memory control module and the door mirror for open circuit or short to ground. Check the mirror operation, renew as necessary.
B1C0701	Driver Left/Right and Right-hand Up/Down Mirror Motor Circuit	Mirror motor left/right circuit open or short circuit Mirror left/right motor failure	Refer to the electrical guides and check the circuit between the memory control module and the door mirror for open circuit or short to ground. Check the mirror operation, renew as necessary.
B1C0801	Passenger Left/Right And Common Mirror Motor Circuit	Mirror motor left/right circuit open or short circuit Mirror left/right motor failure	Refer to the electrical guides and check the circuit between the memory control module and the door mirror for open circuit or short to ground. Check the mirror operation, renew as necessary.
B1C0973	Driver Left/Right Mirror Motor Circuit	Software error (DTC can be logged when the mirror is moved manually) Mirror motor left/right circuit open or short circuit Mirror left/right motor failure	If no customer complaint issue exists with mirror operation, no action necessary, clear/ignore DTC. If mirror functionality is incorrect, refer to the electrical guides and check the circuit for open of short to ground. Renew the mirror motor/mirror as necessary.
B1C1073	Driver Up/Down Mirror Motor Circuit	Software error (DTC can be logged when the mirror is moved manually) Mirror motor up/down circuit open or short circuit Mirror up/down motor failure	If no customer complaint issue exists with mirror operation, no action necessary, clear/ignore DTC. If mirror functionality is incorrect, refer to the electrical guides and check the circuit for open of short to ground. Renew the mirror motor/mirror as necessary.
B1C1173	Passenger Left/Right Mirror Motor Circuit	Software error (DTC can be logged when the mirror is moved manually) Mirror motor left/right circuit open or short circuit Mirror left/right motor failure	If no customer complaint issue exists with mirror operation, no action necessary, clear/ignore DTC. If mirror functionality is incorrect, refer to the electrical guides and check the circuit for open of short to ground. Renew the mirror motor/mirror as necessary.
B1C1273	Passenger Up/Down Mirror Motor Circuit	Software error (DTC can be logged when the mirror is moved manually) Mirror motor up/down circuit open or short circuit Mirror up/down motor failure	If no customer complaint issue exists with mirror operation, no action necessary, clear/ignore DTC. If mirror functionality is incorrect, refer to the electrical guides and check the circuit for open of short to ground. Renew the mirror motor/mirror as necessary.
B1C133A	Driver Up/Down Mirror Motor Feedback Circuit	Door mirror motor moved beyond expected range Sensor circuit open or short circuit Door mirror motor position sensor fault	Refer to the electrical guides and check the harness and connections between the seat memory module and the mirror. Repair/renew as necessary. Check/renew the mirror motor/assembly.
B1C143A	Driver Left/Right Mirror Motor Feedback Circuit	Door mirror motor moved beyond expected range Sensor circuit open or short circuit Door mirror motor position sensor fault	Refer to the electrical guides and check the harness and connections between the seat memory module and the mirror. Repair/renew as necessary. Check/renew the mirror motor/assembly.
B1C153A	Passenger Up/Down Mirror Motor Feedback Circuit	Door mirror motor moved beyond expected range Sensor circuit open or short circuit Door mirror motor position sensor fault	Refer to the electrical guides and check the harness and connections between the seat memory module and the mirror. Repair/renew as necessary. Check/renew the mirror motor/assembly.
B1C163A	Passenger Left/Right Mirror Motor Feedback Circuit	Door mirror motor moved beyond expected range Sensor circuit open or short circuit Door mirror motor position sensor fault	Refer to the electrical guides and check the harness and connections between the seat memory module and the mirror. Repair/renew as necessary. Check/renew the mirror motor/assembly.
B1C1773	Driver Mirror Left Switch	Mirror left switch stuck Mirror left switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the mirror switch pack for short to ground. Check the switch operation, renew as necessary.
B1C1873	Driver Mirror Right Switch	Mirror right switch stuck Mirror right switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the mirror switch pack for short to ground. Check the switch operation, renew as necessary.
B1C1973	Driver Mirror Up Switch	Mirror up switch stuck Mirror up switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the mirror switch pack for short to ground. Check the switch operation, renew as necessary.
B1C2073	Driver Mirror Down Switch	Mirror down switch stuck Mirror down switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the mirror switch pack for short to ground. Check the switch operation, renew as necessary.
B1C2173	Passenger Mirror Left Switch	Mirror left switch stuck Mirror left switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the mirror switch pack for short to ground. Check the switch operation, renew as necessary.
B1C2273	Passenger Mirror Right Switch	Mirror right switch stuck Mirror right switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the mirror switch pack for short to ground. Check the switch operation, renew as necessary.
B1C2373	Passenger Mirror Up Switch	Mirror up switch stuck Mirror up switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the mirror switch pack for short to ground. Check the switch operation, renew as necessary.
B1C2473	Passenger Mirror Down Switch	Mirror down switch stuck Mirror down switch circuit short to ground	Refer to the electrical guides and check the wiring between the memory control module and the mirror switch pack for short to ground. Check the switch operation, renew as necessary.
B1C3173	Steering Column Motor Relay	Software error (electric column not installed) Steering column motor relay fault (stuck on)	Where an electric column adjustment is not installed, no action necessary, clear/ignore DTC. Where an electric column adjustment is installed, refer to the electrical guides and check the column motor circuit for short or open circuit and check/renew the memory control module as necessary.
B1C3193	Steering Column Motor Relay	Software error (electric column not installed) Memory control module internal relay fault (inoperative)	Where an electric column adjustment is not installed, no action necessary, clear/ignore DTC. Where an electric column adjustment is installed, check/renew the control module as necessary.
B1C3213	Steering Column Tilt Solenoid	Software error (electric column not installed) Steering column motor tilt solenoid open load	Where an electric column adjustment is not installed, no action necessary, clear/ignore DTC. Where an electric column adjustment is installed, refer to the electrical guides and check the column tilt solenoid circuit for short or open circuit and check/renew the tilt solenoid as necessary.
B1C3296	Steering Column Tilt Solenoid	Software error (electric column not installed) Steering column motor tilt solenoid thermal overload	Where an electric column adjustment is not installed, no action necessary, clear/ignore DTC. Where an electric column adjustment is installed, refer to the electrical guides and check the column tilt solenoid circuit for short or open circuit. Check for other relevant DTCs and repair as necessary. Allow the solenoid to cool, clear the DTC and check the solenoid/tilt function operation. If the DTC persists renew the tilt solenoid as necessary.
B1C333A	Steering Column Tilt Feedback Signal	Software error (electric column not installed) Steering column tilt motor moved beyond expected range Sensor circuit open or short circuit Motor position sensor fault	Where an electric column adjustment is not installed, no action necessary, clear/ignore DTC. Where an electric column adjustment is installed, refer to the electrical guides and check the column tilt solenoid feedback circuit for short or open circuit. Check the solenoid/tilt function operation and range of movement. Renew the tilt solenoid as necessary.
B1C3413	Steering Column Telescopic Solenoid	Software error (electric column not installed) Steering column motor telescopic solenoid open load	Where an electric column adjustment is not installed, no action necessary, clear/ignore DTC. Where an electric column adjustment is installed, refer to the electrical guides and check the column telescopic solenoid circuit for short or open circuit and check/renew the tilt solenoid as necessary.
B1C3496	Steering Column Telescopic Solenoid	Software error (electric column not installed) Steering column motor telescopic solenoid thermal overload	Where an electric column adjustment is not installed, no action necessary, clear/ignore DTC. Where an electric column adjustment is installed, refer to the electrical guides and check the column telescopic solenoid circuit for short or open circuit. Check for other relevant DTCs and repair as necessary. Allow the solenoid to cool, clear the DTC and check the solenoid/telescopic function operation. If the DTC persists renew the telescopic solenoid as necessary.
B1C353A	Steering Column Telescopic Feedback Signal	Software error (electric column not installed) Steering column telescopic motor moved beyond expected range Sensor circuit open or short circuit Motor position sensor fault	Where an electric column adjustment is not installed, no action necessary, clear/ignore DTC. Where an electric column adjustment is installed, refer to the electrical guides and check the column telescopic solenoid feedback circuit for short or open circuit. Check the solenoid/telescopic function operation and range of movement. Renew the telescopic solenoid as necessary.
B1C363A	Steering Column Tilt/Telescope Switch	Software error (electric column not installed) Steering column tilt/telescopic switch voltage beyond expected range Sensor circuit open or short circuit Switch fault	Where an electric column adjustment is not installed, no action necessary, clear/ignore DTC. Where an electric column adjustment is installed, refer to the electrical guides and check the column tilt/telescopic switch circuit for short or open circuit. Check the tilt/telescopic switch operation and renew the switch as necessary.

Published: 11-May-2011

2007.0 Range Rover Sport (LS), 501-10

Seating

Seats (G830985)