Land Rover Range Rover 1997 4.6L Workshop Manual

landrover :: Land Rover Range Rover HSE (LP)
V8-4.6L (1997)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Locations > Ultrasonic Module (Z205)

Alarm Module: LocationsUltrasonic Module (Z205)

Top Of LH 'B' Post

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Locations > Ultrasonic Module (Z205) > Page 8

Alarm Module: LocationsAlarm R.F. Aerial Module (Z250)

RH Side Of Luggage Compartment

> Relays and Modules > Relays and Modules - Body and Frame > Door Module > Component Information > Locations > Left Front (Z243)

Door Module: LocationsLeft Front (Z243)

Behind front door trim panel

> Relays and Modules > Relays and Modules - Body and Frame > Door Module > Component Information > Locations > Left Front (Z243) > Page 14

Door Module: LocationsRight Front (Z244)

Behind front door trim panel

> Relays and Modules > Relays and Modules - Body and Frame > Power Seat Control Module > Component Information > Locations > Left (Z252)

Power Seat Control Module: LocationsLeft (Z252)

Underside of LH front seat

> Relays and Modules > Relays and Modules - Body and Frame > Power Seat Control Module > Component Information > Locations > Left (Z252) > Page 19

Power Seat Control Module: LocationsSeat Outstation, Right (Z258)

Underside of RH front seat

> Relays and Modules > Relays and Modules - Body and Frame > Power Seat Control Module > Component Information > Locations > Page 20

Power Seat Control Module: Service and Repair

Service repair no 78.70.01

: Seat outstation is used on electrically operated seats with position memory function.NOTE

Remove

1. Remove seat. See: Body and Frame/Seats/Service and Repair 2. Remove 2 bolts securing front of seat frame to cushion pan.

3. Slacken 2 bolts securing rear of seat frame.4. Disconnect 4 multiplugs.

5. Remove 2 nuts securing outstation to frame.6. Lift front of seat frame away from cushion pad to provide clearance for outstation removal. Remove outstation.

Refit

7. Reverse removal procedure.8. Tighten bolts securing cushion pan to frame to 29 Nm (21 ft. lbs.)

> Relays and Modules > Relays and Modules - Body and Frame > Power Seat Relay > Component Information > Locations

Power Seat Relay: Locations

- Under right heat front seatRight Hand Seat Fuse Box

- Right hand side of engine compartmentEngine Compartment Fuse Box

> Relays and Modules > Relays and Modules - Body and Frame > Power Seat Relay > Component Information > Locations > Page 24

Range Rover HSE (LP) V8-4.6L (1997)

RL1 Front Wiper Control Relay
RL2 ABS Power Relay
RL3 Air Suspension Power Relay
RL4 Right Heated Front Screen Relay
RL5 Left Heated Front Screen Relay
RL6 Auxiliary Power 1 Relay
RL7 Auxiliary Power 2 Relay
RL8 Front Wiper Interval Relay
RL9 Horn Relay

RL10 Spare RelayRL11 Headlamps Wash/Wipe RelayRL12 Fuel Pump RelayRL13 A/C Condenser Fan 1 RelayRL14 A/C Condenser Fan 2 RelayRL15 Ignition RelayRL16 Starter RelayRL17 ABS Pump RelayRL18 A/C Control RelayRL19 Engine Main Control RelayRL20 Air Suspension Compressor Relay

> Relays and Modules > Relays and Modules - Body and Frame > Power Seat Relay > Component Information > Locations > Page 25

Range Rover HSE (LP) V8-4.6L (1997)

K213 Left Non-Memory Seat Power Relay 1K215 Left Non-Memory Seat Power Relay 2

> Relays and Modules > Relays and Modules - Body and Frame > Power Seat Relay > Component Information > Locations > Page 26

Range Rover HSE (LP) V8-4.6L (1997)

K214 Right Non-Memory Seat Power Relay 1K216 Right Non-Memory Seat Power Relay 2

> Relays and Modules > Relays and Modules - Body and Frame > Power Seat Relay > Component Information > Locations > Page 27

Power Seat Relay: Service and Repair

SEAT POWER RELAY

Service repair no - 78.70.47

2 power relays are fitted to electrically operated seats without position memory function.NOTE:

Remove

1. If possible, raise seat cushion to full extent to improve access to relays.2. Remove relay from connector block.

Refit

3. Reverse removal procedure.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Locations

ABS Main Relay: Locations

- Under right heat front seatRight Hand Seat Fuse Box

- Right hand side of engine compartmentEngine Compartment Fuse Box

> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Locations > Page 32

Range Rover HSE (LP) V8-4.6L (1997)

RL1 Front Wiper Control Relay
RL2 ABS Power Relay
RL3 Air Suspension Power Relay
RL4 Right Heated Front Screen Relay
RL5 Left Heated Front Screen Relay
RL6 Auxiliary Power 1 Relay
RL7 Auxiliary Power 2 Relay
RL8 Front Wiper Interval Relay
RL9 Horn Relay

RL10 Spare RelayRL11 Headlamps Wash/Wipe RelayRL12 Fuel Pump RelayRL13 A/C Condenser Fan 1 RelayRL14 A/C Condenser Fan 2 RelayRL15 Ignition RelayRL16 Starter RelayRL17 ABS Pump RelayRL18 A/C Control RelayRL19 Engine Main Control RelayRL20 Air Suspension Compressor Relay

> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Locations > Page 33

Range Rover HSE (LP) V8-4.6L (1997)

K213 Left Non-Memory Seat Power Relay 1K215 Left Non-Memory Seat Power Relay 2

> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Locations > Page 34

Range Rover HSE (LP) V8-4.6L (1997)

K214 Right Non-Memory Seat Power Relay 1K216 Right Non-Memory Seat Power Relay 2

> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Locations > Page 35

ABS Main Relay: Description and Operation

The ABS electrical system has two relays and three fuses, located in the underbonnet relay and fuse box:

1. ABS valve block and ECU relay RL 2, yellow.2. Hydraulic pump relay, RL 17 black. Note that this relay is unique to the ABS system.3. Hydraulic pump relay fuse, 40 amp, Maxi 3.4. Valve relay fuse, 30 amp, F27.5. Valve relay fuse, 5 amp, F24.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Brake Fluid Pump Relay > Component Information > Locations

Brake Fluid Pump Relay: Locations

- Under right heat front seatRight Hand Seat Fuse Box

- Right hand side of engine compartmentEngine Compartment Fuse Box

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Brake Fluid Pump Relay > Component Information > Locations > Page 39

Range Rover HSE (LP) V8-4.6L (1997)

RL1 Front Wiper Control Relay
RL2 ABS Power Relay
RL3 Air Suspension Power Relay
RL4 Right Heated Front Screen Relay
RL5 Left Heated Front Screen Relay
RL6 Auxiliary Power 1 Relay
RL7 Auxiliary Power 2 Relay
RL8 Front Wiper Interval Relay
RL9 Horn Relay

RL10 Spare RelayRL11 Headlamps Wash/Wipe RelayRL12 Fuel Pump RelayRL13 A/C Condenser Fan 1 RelayRL14 A/C Condenser Fan 2 RelayRL15 Ignition RelayRL16 Starter RelayRL17 ABS Pump RelayRL18 A/C Control RelayRL19 Engine Main Control RelayRL20 Air Suspension Compressor Relay

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Brake Fluid Pump Relay > Component Information > Locations > Page 40

Range Rover HSE (LP) V8-4.6L (1997)

K213 Left Non-Memory Seat Power Relay 1K215 Left Non-Memory Seat Power Relay 2

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Brake Fluid Pump Relay > Component Information > Locations > Page 41

Range Rover HSE (LP) V8-4.6L (1997)

K214 Right Non-Memory Seat Power Relay 1K216 Right Non-Memory Seat Power Relay 2

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Brake Fluid Pump Relay > Component Information > Locations > Page 42

Brake Fluid Pump Relay: Description and Operation

The ABS electrical system has two relays and three fuses, located in the underbonnet relay and fuse box:

1. ABS valve block and ECU relay RL 2, yellow.2. Hydraulic pump relay, RL 17 black. Note that this relay is unique to the ABS system.3. Hydraulic pump relay fuse, 40 amp, Maxi 3.4. Valve relay fuse, 30 amp, F27.5. Valve relay fuse, 5 amp, F24.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Technical Service Bulletins > All Technical Service Bulletins for Electronic Brake

Control Module: > TEC191196 > Dec > 96 > ECM/ABS ECU - DTC's P1317/P1703 Set

Electronic Brake Control Module: All Technical Service BulletinsECM/ABS ECU - DTC's P1317/P1703 Set

12/31/96
19/11/96/US

SUBJECT: PRIDE - GEMs Codes P1317 & P1703

MODEL: Range Rover 4.0/4.6

AFFECTED VEHICLES: LP

up to TA327537

LHLJLD
DETAIL

If one of the above DTC's appears alone, the technician should inspect the wiring and connectors in the affected circuit. A P1317 code will require acheck of the circuit between the GEMS ECM and the ABS ECU. A P1703 code will require a check between the GEMS ECM and the transfer box ECU.

If the faults occur together it is likely that the operator of the vehicle cycled the ignition key (power up/power down) in a way that is known to cause acommunications "glitch" between the GEMS ECM and the ABS/T box ECU. If this occurred, DTC's P1317 and P1703 would be stored in GEMS andthe MIL would illuminate.

The diagnostic steps and repair procedures detailed in this bulletin were developed as an element of the Land Rover Way OPERATION PRIDE. ThisTIB provides a library location for PRIDE information within the Land Rover North America technical literature system.
ACTION REQUIRED

If during TestBook diagnosis codes P1317 and P1703 are retrieved obtain Prom set PRM9622 and update the ECM Proms as described below. Asoftware modification prevents the problem from occurring.
PARTS INFORMATION
PRM9622 - Prom Set
LRNASTATK - Anti-static Mat Kit
PROCEDURE

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Technical Service Bulletins > All

Technical Service Bulletins for Electronic Brake Control Module: > TEC191196 > Dec > 96 > ECM/ABS ECU - DTC's P1317/P1703 Set > Page 51

Range Rover HSE (LP) V8-4.6L (1997)

NOTE:

Check that PRM9622 is not already fitted by accessing the "vehicle type" icon on the GEMS diagnostic in TestBook. This can be found in Real Timemonitoring under the switches & status icon. The tune I.D. number indicates the PROM currently fitted.
After checking the tune I.D. number, perform the diagnostic procedures and repairs outlined below for the resolution of GEMS Code P1317 & P1703.
PREPARATION

1. Record the fault on a DTCR, complete with freeze frame and FAX to LRNA at [phone].

2. If one of the DTC's appear alone, inspect the wiring and connectors in the affected circuit.

^ P1317 code - check circuit between the GEMS ECM and the ABS ECU.
^ P1703 code - check between the GEMS ECM and the transfer box ECU.

3. If the faults occur together obtain PROM set PRM9622 and update the ECM PROMs as described below.
REMOVAL

1. Make sure the ignition key is turned off.

2. Remove battery cover, ECM cover and harness clamp.

3. Disconnect harnesses and remove ECM.

NOTE:

Verify that white anti-back out strips are in place in connectors. If missing, install new ones.

4. Place ECM on grounded anti-static mat (LRNASTATK), red connector side up. Be sure to wear grounding wrist band (figure 1).

5. Remove 5 Torx(R) (T20) from cover and remove.

6. Remove 8 Torx(R) screws holding circuit board and fold over onto mat exposing chips.

NOTE:

Circuit board is easily damaged. DO NOT use screwdrivers or the like to pry covers off.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Technical Service Bulletins > All

Technical Service Bulletins for Electronic Brake Control Module: > TEC191196 > Dec > 96 > ECM/ABS ECU - DTC's P1317/P1703 Set > Page 52

Range Rover HSE (LP) V8-4.6L (1997)

7. Using suitable pliers carefully remove the blue and green chip covers (figure 2).

8. Remove the exposed Proms with Prom puller.
INSTALLATION

NOTE:

One PROM has 28 pins and the other 32 pins.

1. Make sure that the PROMs are oriented with the cutout towards the red connector and cutouts on the chip sockets.

2. Take care not to damage PROM legs. Carefully install new PROMs.

3. Check for bent pins before replacing PROM covers.
Do not overtighten circuit board screws

4. Install circuit board and fasten with screws removed earlier. Torque to 2.25-2.82 Nm. (20-25 lb. in.).

5. Replace outer cover and fasten with screws.

6. Apply the supplied self-adhesive update label on the side of the ECM to signify that update has been done.

7. Install ECM in box and reconnect wire harnesses.

NOTE:

Ensure that harness grommet is properly placed in ECM box.

8. Install ECM, harness clamp and battery covers.

9. Start vehicle and road test to assure proper engine operation and engine management system adaptation.
WARRANTY:
Normal warranty policy and procedures apply
COMP.CODE
SRO

18.30.89.26 Time 0.50Replace Prom set

19.22.13.17 Time 0.05 hrGems P Code P1317

19.22.17.03 Time 0.05 hrGems P Code P1703

19.22.98 - Time 0.80 hr.TestBook hook up, access codes, DTCR and diagnostic drive

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Technical Service Bulletins > Customer Interest for Electronic Brake Control Module:

> TEC191196 > Dec > 96 > ECM/ABS ECU - DTC's P1317/P1703 Set

Electronic Brake Control Module: Customer InterestECM/ABS ECU - DTC's P1317/P1703 Set

12/31/96
19/11/96/US

SUBJECT: PRIDE - GEMs Codes P1317 & P1703

MODEL: Range Rover 4.0/4.6

AFFECTED VEHICLES: LP

up to TA327537

LHLJLD
DETAIL

If one of the above DTC's appears alone, the technician should inspect the wiring and connectors in the affected circuit. A P1317 code will require acheck of the circuit between the GEMS ECM and the ABS ECU. A P1703 code will require a check between the GEMS ECM and the transfer box ECU.

If the faults occur together it is likely that the operator of the vehicle cycled the ignition key (power up/power down) in a way that is known to cause acommunications "glitch" between the GEMS ECM and the ABS/T box ECU. If this occurred, DTC's P1317 and P1703 would be stored in GEMS andthe MIL would illuminate.

The diagnostic steps and repair procedures detailed in this bulletin were developed as an element of the Land Rover Way OPERATION PRIDE. ThisTIB provides a library location for PRIDE information within the Land Rover North America technical literature system.
ACTION REQUIRED

If during TestBook diagnosis codes P1317 and P1703 are retrieved obtain Prom set PRM9622 and update the ECM Proms as described below. Asoftware modification prevents the problem from occurring.
PARTS INFORMATION
PRM9622 - Prom Set
LRNASTATK - Anti-static Mat Kit
PROCEDURE

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Technical Service Bulletins >

Customer Interest for Electronic Brake Control Module: > TEC191196 > Dec > 96 > ECM/ABS ECU - DTC's P1317/P1703 Set > Page 58

Range Rover HSE (LP) V8-4.6L (1997)

NOTE:

Check that PRM9622 is not already fitted by accessing the "vehicle type" icon on the GEMS diagnostic in TestBook. This can be found in Real Timemonitoring under the switches & status icon. The tune I.D. number indicates the PROM currently fitted.
After checking the tune I.D. number, perform the diagnostic procedures and repairs outlined below for the resolution of GEMS Code P1317 & P1703.
PREPARATION

1. Record the fault on a DTCR, complete with freeze frame and FAX to LRNA at [phone].

2. If one of the DTC's appear alone, inspect the wiring and connectors in the affected circuit.

^ P1317 code - check circuit between the GEMS ECM and the ABS ECU.
^ P1703 code - check between the GEMS ECM and the transfer box ECU.

3. If the faults occur together obtain PROM set PRM9622 and update the ECM PROMs as described below.
REMOVAL

1. Make sure the ignition key is turned off.

2. Remove battery cover, ECM cover and harness clamp.

3. Disconnect harnesses and remove ECM.

NOTE:

Verify that white anti-back out strips are in place in connectors. If missing, install new ones.

4. Place ECM on grounded anti-static mat (LRNASTATK), red connector side up. Be sure to wear grounding wrist band (figure 1).

5. Remove 5 Torx(R) (T20) from cover and remove.

6. Remove 8 Torx(R) screws holding circuit board and fold over onto mat exposing chips.

NOTE:

Circuit board is easily damaged. DO NOT use screwdrivers or the like to pry covers off.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Technical Service Bulletins >

Customer Interest for Electronic Brake Control Module: > TEC191196 > Dec > 96 > ECM/ABS ECU - DTC's P1317/P1703 Set > Page 59

Range Rover HSE (LP) V8-4.6L (1997)

7. Using suitable pliers carefully remove the blue and green chip covers (figure 2).

8. Remove the exposed Proms with Prom puller.
INSTALLATION

NOTE:

One PROM has 28 pins and the other 32 pins.

1. Make sure that the PROMs are oriented with the cutout towards the red connector and cutouts on the chip sockets.

2. Take care not to damage PROM legs. Carefully install new PROMs.

3. Check for bent pins before replacing PROM covers.
Do not overtighten circuit board screws

4. Install circuit board and fasten with screws removed earlier. Torque to 2.25-2.82 Nm. (20-25 lb. in.).

5. Replace outer cover and fasten with screws.

6. Apply the supplied self-adhesive update label on the side of the ECM to signify that update has been done.

7. Install ECM in box and reconnect wire harnesses.

NOTE:

Ensure that harness grommet is properly placed in ECM box.

8. Install ECM, harness clamp and battery covers.

9. Start vehicle and road test to assure proper engine operation and engine management system adaptation.
WARRANTY:
Normal warranty policy and procedures apply
COMP.CODE
SRO

18.30.89.26 Time 0.50Replace Prom set

19.22.13.17 Time 0.05 hrGems P Code P1317

19.22.17.03 Time 0.05 hrGems P Code P1703

19.22.98 - Time 0.80 hr.TestBook hook up, access codes, DTCR and diagnostic drive

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Technical Service Bulletins > Page 60

Electronic Brake Control Module: Specifications

Torque Specifications

ECU Mounting Bolts ................................................................................................................................................................................... 6 Nm. (4 ft. lbs.)

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Technical Service Bulletins > Page 61

Electronic Brake Control Module: Locations

Beneath Fascia On Passenger's Side Of Bulkhead

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Technical Service Bulletins > Page 62

Electronic Brake Control Module: Service and Repair

Numbers in parentheses ( ) refer to numbers in illustrations.NOTE:

REMOVAL

1. Remove 3 fasteners (1) securing the passenger side underdash trim panel. Release panel for access to ABS Electronic Control Unit .(ECU)

2. Disconnect ECU multiplug (2).3. Remove 2 bolts (3) securing ECU to bracket.4. Remove ECU.

INSTALLATION

6 Nm (4 ft. lbs.).

1. Locate ECU to bracket, install securing bolts. Tighten to 2. Connect multiplug to ECU. Install closing panel and secure with fasteners.

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Locations

Radiator Cooling Fan Motor Relay: Locations

- Under right heat front seatRight Hand Seat Fuse Box

- Right hand side of engine compartmentEngine Compartment Fuse Box

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Locations > Page 67

Range Rover HSE (LP) V8-4.6L (1997)

RL1 Front Wiper Control Relay
RL2 ABS Power Relay
RL3 Air Suspension Power Relay
RL4 Right Heated Front Screen Relay
RL5 Left Heated Front Screen Relay
RL6 Auxiliary Power 1 Relay
RL7 Auxiliary Power 2 Relay
RL8 Front Wiper Interval Relay
RL9 Horn Relay

RL10 Spare RelayRL11 Headlamps Wash/Wipe RelayRL12 Fuel Pump RelayRL13 A/C Condenser Fan 1 RelayRL14 A/C Condenser Fan 2 RelayRL15 Ignition RelayRL16 Starter RelayRL17 ABS Pump RelayRL18 A/C Control RelayRL19 Engine Main Control RelayRL20 Air Suspension Compressor Relay

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Locations > Page 68

Range Rover HSE (LP) V8-4.6L (1997)

K213 Left Non-Memory Seat Power Relay 1K215 Left Non-Memory Seat Power Relay 2

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Locations > Page 69

Range Rover HSE (LP) V8-4.6L (1997)

K214 Right Non-Memory Seat Power Relay 1K216 Right Non-Memory Seat Power Relay 2

> Relays and Modules > Relays and Modules - Cruise Control > Cruise Control Module > Component Information > Locations > Cruise Control ECU (Z121)

Cruise Control Module: LocationsCruise Control ECU (Z121)

Behind RH Side Of Fascia Right Of Steering Column

> Relays and Modules > Relays and Modules - Cruise Control > Cruise Control Module > Component Information > Locations > Cruise Control ECU (Z121) > Page 75

Cruise Control Module: LocationsCruise Control Converter/Inverter Module (Z249)

Behind RH Side Of Fascia Right Of Steering Column

> Relays and Modules > Relays and Modules - Cruise Control > Cruise Control Module > Component Information > Locations > Page 76

Cruise Control Module: Service and Repair

Service repair no - 19.75.49
Remove

1. Remove fascia closing panel.2. Remove 2 bolts securing ECU bracket to fascia. Release bracket to gain access to fixings.3. Disconnect multiplug from ECU.4. Remove 2 bolts securing ECU. Remove ECU.

Refit

5. Reverse removal procedure.

> Relays and Modules > Relays and Modules - HVAC > Condenser Fan Motor Relay, HVAC > Component Information > Locations

Condenser Fan Motor Relay: Locations

- Under right heat front seatRight Hand Seat Fuse Box

- Right hand side of engine compartmentEngine Compartment Fuse Box

> Relays and Modules > Relays and Modules - HVAC > Condenser Fan Motor Relay, HVAC > Component Information > Locations > Page 81

Range Rover HSE (LP) V8-4.6L (1997)

RL1 Front Wiper Control Relay
RL2 ABS Power Relay
RL3 Air Suspension Power Relay
RL4 Right Heated Front Screen Relay
RL5 Left Heated Front Screen Relay
RL6 Auxiliary Power 1 Relay
RL7 Auxiliary Power 2 Relay
RL8 Front Wiper Interval Relay
RL9 Horn Relay

RL10 Spare RelayRL11 Headlamps Wash/Wipe RelayRL12 Fuel Pump RelayRL13 A/C Condenser Fan 1 RelayRL14 A/C Condenser Fan 2 RelayRL15 Ignition RelayRL16 Starter RelayRL17 ABS Pump RelayRL18 A/C Control RelayRL19 Engine Main Control RelayRL20 Air Suspension Compressor Relay

> Relays and Modules > Relays and Modules - HVAC > Condenser Fan Motor Relay, HVAC > Component Information > Locations > Page 82

Range Rover HSE (LP) V8-4.6L (1997)

K213 Left Non-Memory Seat Power Relay 1K215 Left Non-Memory Seat Power Relay 2

> Relays and Modules > Relays and Modules - HVAC > Condenser Fan Motor Relay, HVAC > Component Information > Locations > Page 83

Range Rover HSE (LP) V8-4.6L (1997)

K214 Right Non-Memory Seat Power Relay 1K216 Right Non-Memory Seat Power Relay 2

> Relays and Modules > Relays and Modules - HVAC > Control Module HVAC > Component Information > Technical Service Bulletins > Customer Interest: > TEC800196R > Dec > 96 > A/C - Poor System Performance

Technical Service Bulletin # TEC800196R

A/C - Poor System Performance

Issue: 2
12/13/96
80/01/96/US

SUBJECT: PRIDE - HVAC Printed Circuit Board Check/Replace

MODEL: Range Rover 4.0/4.6

AFFECTED VEHICLES: LP

SA302295 to TA344173

LHLJLD
DETAIL

Some Range Rovers may experience poor operation of the heating and ventilation unit To overcome these concerns, Land Rover has introduced a newHeating and Air Conditioning Control logic. The new control software has been fitted on the assembly line and produces a safe VIN of TA344173. Anyvehicle after this VIN will have the new control software fitted upon assembly.
A fix has been designed which involves the replacement of the PC board in the control unit. Use the following procedure to replace the PC board.

The diagnostic steps and repair procedures detailed on this bulletin were developed as an element of the Land Rover Way OPERATION PRIDE. ThisTIB provides a library location for PRIDE information within the Land Rover North America technical literature system.
ACTION REQUIRED

Upon customer complaint for the symptoms outlined, perform the specified repairs. Reference should also be made to bulletin 86/02/96/US (ExteriorTemperature Reading Incorrect) prior to replacing the control panel.
PARTS INFORMATION
STC 3702K HVAC Circuit Board
LRNASTATK Anti-static Mat Kit
PROCEDURE
Perform the diagnostic procedures and repairs as outlined for the repair of HVAC control units.

> Relays and Modules > Relays and Modules - HVAC > Control Module HVAC > Component Information > Technical Service Bulletins > Customer Interest: >

TEC800196R > Dec > 96 > A/C - Poor System Performance > Page 92

Range Rover HSE (LP) V8-4.6L (1997)

WARRANTY:
Normal warranty procedures and policies apply.
COMP. CODE:
6Y1U
SRO:

80.10.02 - Time 0.35 hr.

Remove HVAC control and inspect

80.10.89.27 - Time 0.55 hr.Remove HVAC control, inspect and replace circuit board

NOTE:

Times and operation descriptions are modification of PRIDE manual information.
SYMPTOMS:
Poor operation of the heating and ventilation unit can be categorized by the following symptoms:
Symptom 1:

Poor performance of heating and ventilation system in automatic mode. Specifically, insufficient responsiveness to achieve and maintain selected cabintemperature after start-up in hot ambient conditions.
Symptom 2:
Delay after start-up in hot ambient conditions before cooled air is supplied.
Symptom 3:
Inaccurate exterior-temperature readout, especially after hot soak.

To overcome these concerns Land Rover is introducing a new Heater and Air Conditioning Control Panel with the following changes to overcome theabove symptoms:
Symptom 1:

More aggressive fan speed control and revised dynamic performance strategy (including improved recirculation logic) to provide optimum performancein achieving and maintaining selected cabin temperature.
Symptom 2:
Logic changes within the unit eliminate the delay.
Symptom 3:
High temperature accuracy is improved due to changes made in the recirculation within the unit.

NOTE:

For more information on system characteristics, how the system works and diagnostics, see the HVAC specification document published withOperation PRIDE.

Refer to the Workshop Manual section 80, HVAC Controls, for removal instructions.

(Refer to this bulletin for the PC board replacement instructions)

Removal/Inspection

Removal

1. Remove two screws in each center console side panel.

> Relays and Modules > Relays and Modules - HVAC > Control Module HVAC > Component Information > Technical Service Bulletins > Customer Interest: >

TEC800196R > Dec > 96 > A/C - Poor System Performance > Page 93

Range Rover HSE (LP) V8-4.6L (1997)

2. Pull side panels down and away, and remove (Fig 1).

3. Remove four screws holding control unit (Fig 2).

4. Ensure that the parking brake is on, place gear selector in neutral, and carefully remove HVAC control unit.

5. Remove four multi-plugs from control unit.
Inspection

1. Check control for "Soft 15.00" label. If present the modification has already been done.

2. Check for part number AWR 5051 (the updated part, beyond VIN TA344173).

3. In any other case the board must be changed.

PC Board Replacement

! Before performing this repair, obtain a grounded anti-static mat. Place the control unit on the mat and attach wrist band.

1. Remove six Torx(R) (T-10) screws from metal base.

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Range Rover HSE (LP) V8-4.6L (1997)

2. Place control unit on an anti-static mat with control unit face towards you.

3. Put anti-static bracelet on your wrist and ground bracelet to anti static work station.

4. Pry apart two plastic retainers from metal base and remove metal base.

CAUTION:

Do not touch any metallic pins or surfaces on PC board. Handle the PC board by its edges.

5. Carefully remove PC board from control unit. Push on the plastic parts of the harness connectors if necessary.

6. Holding the PC board by its edges, remove ribbon plug from PC board and scrap old PC board.

CAUTION:

Do not touch any metallic pins or surfaces on PC board. Handle the PC board by its edges.

7. Remove new PC board from its packaging.

8. Ensure ribbon cable is not twisted. Carefully install ribbon plug fully and firmly onto new PC board.

9. Holding the PC board by its edges, tilt control unit horizontally and carefully install new PC board.

NOTE:

Ensure that both the black and the white connector will fit into control unit housing.

CAUTION:

Screws must not be over-tightened or allowed to drop into control unit interior. If a screw falls into control unit interior, the unit must be scrapped.

10. Position metal cover and using magnetic screwdriver, snugly tighten six retaining screws.

11. Install label provided with STC3702K on control unit over old label to denote service update.

12. Install four multi-connectors onto control unit, making sure that the plugs are fully seated in sockets.

13. Place control unit into dash and secure with four screws.

14. Install center console side panels and secure with screws removed earlier.

NOTE:

A complete test of the newly installed control unit must now be performed.

15.

First, place ignition switch in position 2:.Front panel must show:
^ Temp. = 21C (70F) and 21C (70F).

^ Face vent LED illuminated.

16. Complete HVAC initialization procedure using TestBook.

17. After initialization is completed with TestBook, start the engine and set temp to LO/LO.

18. Observe that the following HVAC functions occur:

^ Blower speed to MAX
^ Recirc. to ON
^ A/C ON

NOTE:

After 10 secs. cold air should be emitted from the vents. Make sure that the air is circulated using the recirculation mode, not fresh air.

19. Next, with the engine running set the temperature to HI/HI.

20. Observe that the following HVAC functions occur:

^ Blower slows to MEDIUM

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Range Rover HSE (LP) V8-4.6L (1997)

^ Recirc. to OFF
^ A/C is ON

NOTE:

After 10 seconds hot air should be emitted from the vents. Make sure that the air is circulated using the recirculation mode, not fresh air.

21.

Set distribution to the following positions and verify at each step the LED is illuminated above the appropriate button and the air comes out of theappropriate vent.
^ Face and feet.

^ Then to just feet.
^ Then to windshield and feet.
^ Then to just windshield.

22. Push each heated seat buttons and check that the LED is illuminated above the appropriate button and the seat begins to heat up.

23. Push both demist buttons (front and back) and check that the LED is illuminated above the appropriate button and the relay is heard switching.

24.

Connect TestBook and interrogate HVAC system to determine if any faults are stored. Ensure that cold climate package is selected for vehiclespecifications.

NOTE:

The HVAC control unit logic includes a self-tune feature to ensure optimum air control flap position, both on assembly and during the early lifebedding in period. The self-tune routine. is activated on the 1st, 10th, 20th, 50th, 100th, 500th and subsequent 500th start-ups. It sweeps the aircontrol flaps (recirculation, blend, and distribution) through all positions, and takes 90 seconds to complete. During this time, there is no fanoperation or airflow.
!

After servicing a vehicle that requires a new control unit, inform the customer of the self-tuning routine. This will ensure that the customer does notmistake the self-tuning as a fault. Explain to the customer that the self-tuning routine is a calibration process that improves the performanceconsistency throughout the life of the vehicle and is done to accommodate any wear of the mechanisms associated with the HVAC unit.

> Relays and Modules > Relays and Modules - HVAC > Control Module HVAC > Component Information > Technical Service Bulletins > All Technical Service Bulletins for Control Module HVAC: > TEC8001982 > Mar > 98

> A/C - Revised ECU Diagnosis/Service

Control Module HVAC: All Technical Service BulletinsA/C - Revised ECU Diagnosis/Service

No: 80/01/98/NAS
Ref: WSM Sections 80, 76,19
*Issue: 2*
Date: 03/06/98

PRIDE VI 6-40
HVAC - Revised Service Procedures
AFFECTED VEHICLE RANGE:
RANGE ROVER (LP) Up to WA381431
* indicates updated information
SITUATION:
REVISED DIAGNOSTIC AND PARTS POLICY FOR NEW HVAC ECU

At VIN WA381431 the HVAC ambient temperature sensor was moved from the fresh air intake plenum to a new location behind the front spoiler. Therevised location greatly improves the response time of the sensor. At the same VIN, the software in the HVAC ECU was changed to allow it to properlyinterpret the signal from the relocated sensor.

The revised ECU employs a software strategy that prevents engine heat soak from affecting the temperature reading at low vehicle speeds. Under certainconditions, this strategy may prevent the display from updating. A revised procedure for diagnosing ambient temperature is required to preventunnecessary replacement of the ECU.

The older HVAC ECU will be superceded to the latest style. When an ECU is replaced on an older vehicle, the sensor will need to be relocated in orderfor the system to operate correctly.
RESOLUTION:

REVISED DIAGNOSTIC AND PARTS POLICY

Different diagnostic procedures are required to service the HVAC system. Use the procedure outlined in this TIB to diagnose ambient temperaturesensor faults on vehicles with externally mounted temperature sensors.

When replacing the HVAC ECU for any reason on a vehicle before WA381431 reposition the ambient temperature sensor using the procedure in thisTIB.

*NOTE:

The repairs outlined in this TIB are to be performed to resolve customer complaint of the symptoms described.*
PARTS INFORMATION:
JTN100000 ECU Installation Kit (supercedes AWR5051)
WARRANTY CLAIMS:

82.20.89.28

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Range Rover HSE (LP) V8-4.6L (1997)

Time 1.30 hrs.Install replacement HVAC ECU and install external temperature sensor

FAULT CODE: U
Normal warranty policy and procedures apply
REPAIR PROCEDURE:
REVISED AMBIENT TEMPERATURE SENSOR DIAGNOSIS PROCEDURE

NOTE:

On vehicles with an exterior mounted ambient temperature sensor the following operational parameters must be kept in mind when troubleshootingthe system:

^ Under most conditions the ambient temperature display does NOT update until the vehicle is driven over 15 MPH (25 KPH). THIS IS NORMAL

AND DOES NOT INDICATE A FAULT WITH THE CONTROL UNIT.

^ If the temperature reading is increasing, the ECU will limit the temperature change to a rate of 1F (0.5C) per minute.

1.

To diagnose an inaccurate temperature indication, first drive the vehicle above 15 MPH (25 KPH) for several minutes to determine if thetemperature reading adjusts to current conditions.

2. If the reading is still incorrect, check the resistance of the temperature sensor and compare it to the resistance values in chart.

3. If the sensor resistance is as specified, disconnect connectors C245 and C250.

NOTE:

In each of the following checks, if the resistance exceeds 2 ohms it is considered excessive.

4. Perform a resistance check of the sensor wires as follows:

^ Check resistance between C245, terminal 8 and C250, terminal 1
^ Check resistance between C245, terminal 7 and C250, terminal 2

5. Repair any leads where the resistance exceeds 2 ohms and repeat the resistance check.

NOTE:

In each of the following checks, the resistance reading must be infinite.

6. With C245 and C250 disconnected, check the sensor wires for a short:

^ Check resistance between C245, terminal 8 and ground
^ Check resistance between C245, terminal 7 and ground
^ Check resistance between C245, terminal 7 and C245, terminal 8

7. Repair any leads that have continuity in the above steps and repeat resistance and continuity checks.

8. Install connectors C245 and C250 when repairs are complete.
SYSTEM UPDATE TO LATEST CONFIGURATION ECU

CAUTION:

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for Control Module HVAC: > TEC8001982 > Mar > 98 > A/C - Revised ECU Diagnosis/Service > Page 102

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If the ECU is not matched to the proper sensor configuration, the HVAC system will not operate correctly.

NOTE:

The HVAC ECU has been superceded by the latest version, which is designed to work with an externally mounted ambient temperature sensor.When replacing an older style ECU, the temperature sensor must be relocated to the outside of the vehicle. To facilitate this, the older ECUsupercedes to a kit, which consists of an ECU, sensor, bracket and link lead.

NOTE:

The ECU type can be identified by checking the part number on the label:

^ P/N AWR5050 or AWR1012 must be used with an internal temperature sensor located in the air intake plenum.

^ P/N JFC101890 must be used with an external temperature sensor located behind the front spoiler.
SENSOR INSTALLATION

1. Disconnect battery.

2. Remove HVAC ECU as described in Workshop Manual Section 80, Operation 80.10.02.

3. Remove front bumper as outlined in Workshop Manual Section 76, Operation 76.22.72 through step 6.

4. Mark the position of the left bumper impact can assembly relative to the chassis to ensure correct positioning upon installation.

5. Remove the 2 nuts securing the impact can and the washer plate behind the nuts.

6. Install the bracket supplied in the kit in place of the washer plate with the sensor mounting opening in the down position (Figure 1).

7. Install bumper mount nuts, position the impact can to align the position marked in step 4 and tighten the nuts to 25 Nm (18 lbf. ft.).