DIAGNOSIS AND TESTING

Overview

The wiper and washer system is controlled by the central junction box (CJB). All wiper functions for the front and rear wipers are controlled from a multi-function wash/wipe switch assembly located on the steering column.

For information on the description and operation of the system, refer to section 501-16 of the workshop manual.

Inspection and Verification

Verify the customer concern.

Visually inspect for obvious signs of mechanical or electrical faults.

Visual inspection

Mechanical	Electrical
Windshield and rear window for damage or contamination e.g. road film or general residue deposits Wiper blades, arms and linkage for wear, security, damage and freedom of movement Windshield/Rear window/Headlamp washer fluid level Washer pipes and jets for leaks, restrictions and damage	Battery condition and state of charge Fusible links Battery junction box (BJB) - fusible link 11E Battery junction box (BJB) - fusible link 18E Battery junction box (BJB) - fusible link 7E Fuses Battery junction box (BJB) - fuse 29E Battery junction box (BJB) - fuse 12E Central junction box (CJB) - fuse 48P Central junction box (CJB) - fuse 28P Central junction box (CJB) - fuse 11P Relays Battery junction box (BJB) - wiper relays Battery junction box (BJB) - headlamp power wash relay Battery junction box (BJB) - heated washer jet relay Central junction box (CJB) - washer pump relay Relay trailer - rear wiper relay Electrical connections Front and rear wiper motors Wiper switch Washer pumps Rain/light sensor Heated front washer jets Ignition switch Light switch Ambient air temperature sensor Central junction box (CJB) Battery junction box (BJB) ABS module Automatic temperature control module (ATCM) Instrument panel cluster (IPC) module Controller area network (CAN) circuits

Mechanical

Electrical

Windshield and rear window for damage or contamination e.g. road film or general residue deposits
Wiper blades, arms and linkage for wear, security, damage and freedom of movement
Windshield/Rear window/Headlamp washer fluid level
Washer pipes and jets for leaks, restrictions and damage

Battery condition and state of charge
Fusible links
- Battery junction box (BJB) - fusible link 11E
- Battery junction box (BJB) - fusible link 18E
- Battery junction box (BJB) - fusible link 7E
Fuses
- Battery junction box (BJB) - fuse 29E
- Battery junction box (BJB) - fuse 12E
- Central junction box (CJB) - fuse 48P
- Central junction box (CJB) - fuse 28P
- Central junction box (CJB) - fuse 11P
Relays
- Battery junction box (BJB) - wiper relays
- Battery junction box (BJB) - headlamp power wash relay
- Battery junction box (BJB) - heated washer jet relay
- Central junction box (CJB) - washer pump relay
- Relay trailer - rear wiper relay
Electrical connections
Front and rear wiper motors
Wiper switch
Washer pumps
Rain/light sensor
Heated front washer jets
Ignition switch
Light switch
Ambient air temperature sensor
Central junction box (CJB)
Battery junction box (BJB)
ABS module
Automatic temperature control module (ATCM)
Instrument panel cluster (IPC) module
Controller area network (CAN) circuits

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 diagnostic trouble codes (DTCs) before moving onto the symptom chart or DTC index.

Symptom chart

Symptom	Possible causes	Action
Wiper blade(s) drag/judder across the windshield/rear window	Contamination of the windshield/rear window Incorrectly installed wiper arm(s) Wiper arm(s) incorrectly aligned to the screen Wiper arm(s) spring tension inadequate	Clean the windshield/rear window. Check for the correct installation and tension of the wiper arm(s). Refer to the relevant section of the workshop manual. Rectify as necessary.
Very slow operation of the wiper(s) across the windshield/rear window	Low battery voltage Front wiper linkage seized or fouling Wiper circuit fault Wiper switch fault High resistance	Check the battery condition and state of charge. Check the wiper linkage for fouling. Disconnect the motor from the linkage. Refer to the relevant section of the workshop manual. Check the linkage operation. Check for DTCs indicating a wiper circuit fault. Rectify as necessary.
Wiper(s) inoperative
Noisy operation of wiper(s)	Wiper motor/linkage fault	Lift the wiper arm(s) from the windshield/rear window and recheck the noise level during the wiper sweep operation.
Noisy operation of washers	Washer motor(s) faulty Washer system blocked or partially blocked	Listen for washer motor operation. Check and top up washer fluid level. Check and rectify blocked washer circuit. Check the wiper/washer circuit for DTCs indicating a fault. Rectify as necessary.
Washers do not operate	Fluid level low Washer circuit blocked Washer circuit faulty

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).
Intermittent faults may cause DTCs to be logged, however some DTCs may be cleared during an ignition off, ignition on cycle. Carry out a road test (if safe to do so), check the functionality of the system and retrieve any DTCs before turning the ignition off.
For additional DTCs, refer to section 418-00 - Network Communications in the workshop manual.

DTC	Description	Possible causes	Action
B1A6811	Ambient Temperature Sensor	Ambient air temperature sensor signal short circuit to ground	Refer to the electrical guide and check the ambient air temperature sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1A6815	Ambient Temperature Sensor	Ambient air temperature sensor signal high resistance Ambient air temperature sensor signal short circuit to 5 volts	Refer to the electrical guides and check the ambient air temperature sensor circuit. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B551C	Rain Sensor Module	Rain sensor module supply voltage out of range	Refer to the electrical guides and check the power supply to the sensor module from the CJB, repair as necessary. If the power supply exists, no further action necessary, clear/ignore DTC.
B1B5546	Rain Sensor Module	Rain sensor module calibration/parameter memory failure: Initialization error - unable to perform optical calibration	Check the cleanliness of the windscreen in the sensor location. Check for correct installation of the sensor to the optical element and the adherence of the optical element to windscreen. Clear DTC and retest. If DTC persists, renew the rain/ambient light sensor.
B1B5549	Rain Sensor Module	Rain sensor module internal electronic failure	Renew the rain/ambient light sensor.
B1B5587	Rain Sensor Module	No response from rain sensor module	Rain sensor 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.
B1B5591	Rain Sensor Module	Rain sensor module - measured temperature outside of normal operating range	No action necessary, clear/ignore DTC.
B1C4467	Rear Wiper Park Position Switch Stuck	Incorrect software level (NNV502520) resulting in DTC log when engine is cranked or the tailgate is opened when the rear wiper is running Rear wiper park position circuit short to ground Rear wiper motor park switch fault	Ensure the software level is NNV502990 or later and update if necessary using the manufacturers recommended diagnostic equipment. Clear the DTC and retest. Refer to the electrical guides and check the rear wiper park position circuit. Clear the DTC and retest. If the DTC returns, suspect an internal fault with the rear wiper motor, check and renew as required.
B1C4567	Front Wiper Park Position Switch Stuck	Incorrect software level (NNV502520)resulting in DTC log when engine is cranked or the tailgate is opened when the front wiper is running Front wiper park position circuit short to ground Front wiper motor park switch fault	Ensure the software level is NNV502990 or later and update if necessary using the manufacturers recommended diagnostic equipment. Clear the DTC and retest. Refer to the electrical guides and check the front wiper park position circuit. Clear the DTC and retest. If the DTC returns, suspect an internal fault with the front wiper motor, check and renew as required.
B1C4623	Rear Washer Switch Stuck	Rear washer circuit short to ground Rear washer switch fault	Refer to the electrical guides and check the rear washer switch circuit. Check the switch operation, renew as necessary.
B1C4723	Front Washer Switch Stuck	Front washer circuit short to ground Front washer switch fault	Refer to the electrical guides and check the front washer switch circuit. Check the switch operation, renew as necessary.
B1C5329	Front Wiper Intermittent Data	Front wiper intermittent circuit short or open circuit Front wiper switch fault	Refer to the electrical guides and check the intermittent wiper switch circuit. Check the switch operation, renew as necessary.
B1C7612	Front Wiper Fast Relay Coil Circuit	Front wiper fast relay coil circuit short to power	Refer to the electrical guides and check the front wiper fast relay circuit, repair/renew as necessary.
B1C7614	Front Wiper Fast Relay Coil Circuit	Front wiper fast relay coil circuit short to ground or open circuit	Refer to the electrical guides and check the front wiper fast relay circuit, repair as necessary.
B1C7712	Rear Wiper Fast Relay Coil Circuit	Rear wiper fast relay coil circuit short to power	Refer to the electrical guides and check the rear wiper fast relay circuit, repair/renew as necessary.
B1C7714	Rear Wiper Fast Relay Coil Circuit	Rear wiper fast relay coil circuit short to ground or open circuit	Refer to the electrical guides and check the rear wiper fast relay circuit, repair as necessary.
B1C7812	Powerwash Relay Coil Circuit	Front washer pump/powerwash relay coil circuit short to power	Refer to the electrical guides and check the relevant washer pump relay circuit, repair as necessary.
B1C7814	Powerwash Relay Coil Circuit	Front washer pump/powerwash relay coil circuit short to ground or open circuit	Refer to the electrical guides and check the relevant washer pump relay circuit, repair as necessary.
B1C7912	Front Washer Pump Relay Output Circuit	Front washer pump relay output circuit short to power	Refer to the electrical guides and check the front washer pump relay circuit, repair/renew as necessary.
B1C7914	Front Washer Pump Relay Output Circuit	Front washer pump relay output circuit short to ground or open circuit	Refer to the electrical guides and check the front washer pump relay supply fuse and the relay output circuit, repair as necessary.
B1C8012	Rear Washer Pump Relay Coil Circuit	Rear washer pump relay coil circuit short to power	Refer to the electrical guides and check the rear washer pump relay circuit, repair as necessary.
B1C8014	Rear Washer Pump Relay Coil Circuit	Rear washer pump relay coil circuit short to ground or open circuit	Refer to the electrical guides and check the rear washer pump relay circuit, repair as necessary.
B1C8112	Rear Washer Pump Relay Output Circuit	Rear washer pump relay output circuit short to power	Refer to the electrical guides and check the rear washer pump relay circuit, repair/renew as necessary.
B1C8114	Rear Washer Pump Relay Output Circuit	Rear washer pump relay output circuit short to ground or open circuit	Refer to the electrical guides and check the rear washer pump relay supply fuse and the relay output circuit, repair as necessary.
B1C8212	Headlamp Washer Relay A	Headlamp washer relay output circuit short to power	Where feature is installed, refer to the electrical guides and check the headlamp pump relay circuit, repair as necessary.
B1C8214	Headlamp Washer Relay A	Headlamp washer relay output circuit short to power	Where feature is installed, refer to the electrical guides and check the headlamp pump relay circuit, repair/renew as necessary.
B1D3713	Wiper Switch Connection Circuit	Wiper switch connection circuit open circuit	Refer to the electrical guides and check the switch circuit, repair/renew as necessary.
B1D3813	Front Wiper Motor	Front wiper motor circuit open circuit	Refer to the electrical guides and check the wiper circuit, repair/renew as necessary.
B1D3913	Rear Wiper Motor	Rear wiper motor circuit open circuit	Refer to the electrical guides and check the wiper circuit, repair/renew as necessary.
B1D4613	Tailgate Latch Connection Circuit	Tailgate ajar switch circuit high resistance Tailgate ajar switch failure	Refer to the electrical guides and check the latch circuit, repair/renew as necessary.
U030055	Internal Control Module Software Incompatibility	Incorrect software loaded CAN wiring to instrument cluster high resistance Incorrect instrument cluster CAN configuration	Configure the module using the approved diagnostic system. Check the CAN circuits. Refer to the electrical guides.
U1A0387	Car Config Parameter	Lost communication with the BCM/RCM Missing message Car configuration not received	Configure the module using the approved diagnostic system. Refer to the lost communication statement in the Network Communications section in the workshop manual.
U1A1449	CAN Initialization Failure	CAN bus initialization failure CAN bus high resistance	Configure the module using the approved diagnostic system. Check the CAN circuits. Refer to the electrical guides.

Published: 11-May-2011

2007.0 Range Rover Sport (LS), 501-16

Wipers and Washers (G830991)