LTB00793NAS2 - Suspension Air Supply Unit Exhaust Valve Fails To Vent I TOPlx

4/15/2016

TECHNICAL BULLETIN
LTB00793NAS2
15 APR 2016
© Jaguar Land Rover North America, LLC
NOTE: The information in Technical Bulletins is intended for use by trained, professional Technicians with the knowledge, tools, and equipment required to do the
job properly and safely. It informs these Technicians of conditions that may occur on some vehicles, or provides information that could assist in proper vehicle
service. The procedures should not be performed by 'do-it-yourselfers'. If you are not a Retailer, do not assume that a condition described affects your vehicle.
Contact an authorized Land Rover service facility to determine whether this bulletin applies to a specific vehicle.

This reissue replaces all previous versions. Please destroy all previous versions.
Changes are highlighted in gray

SECTION: 204-05

Suspension Air Supply Unit Exhaust Valve Fails To Vent
AFFECTED VEHICLE RANGE:
LR4 (LA)
Model Year:
VIN:
Assembly
Plant:

2015-2016
745077-813756

With:

Dynamic Suspension

Range Rover Sport (LW)
Model Year:
2015-2016
VIN:
505041-578144
Assembly
Solihull
Plant:

With:

Dynamic Suspension

Range Rover Sport (LW)
Model Year:
2014-2016
VIN:
600009-648477
Assembly
Solihull
Plant:

With:

Dynamic Suspension

Range Rover (LG)
2015-2016
Model Year:
VIN:
197621-279492
Assembly
Solihull
Plant:

With:

Dynamic Suspension

Solihull

MARKETS:
NAS

CONDITION SUMMARY:
Situation: The air suspension system may not raise/lower with a warning displayed on the Instrument Cluster and Diagnostic Trouble Code
(DTC) C1A13-64 may be stored.
Cause: This may be caused by the suspension air supply unit failing to vent in the allotted time due to either a blocked silencer or faulty exhaust
valve.
Action: Should a customer express this concern, follow the Service Instruction below.

PARTS:
LR075760

Suspension air supply unit exhaust valve - LR4 (L319)

Quantity: 1

LR078650

Suspension air supply unit - LR4 (L319)

Quantity: 1

LR075759

Suspension air supply unit exhaust valve - Range
Rover Sport (L494), Range Rover (L405)

Quantity: 1

LR069693

Suspension air supply unit - Range Rover Sport (L494;
with third row seating)

Quantity: 1

LR069691

Suspension air supply unit - Range Rover Sport (L494;
without third row seating), Range Rover (L405)

Quantity: 1

TOOLS:
Jaguar Land Rover-approved diagnostic tool with latest DVD and calibration File
Jaguar Land Rover-approved Midtronics battery power supply
Refer to the Service Instruction/Workshop Manual for any required special tools.

WARRANTY:
6 , NOTE: Repair procedures are under constant review, and therefore times are subject to change; those quoted here must be taken
as guidance only. Always refer to TOPlx to obtain the latest repair time.
http://topix.landrover.jlrext.com/topix/content/document/view?id=644182

1/6

LTB00793NAS2 - Suspension Air Supply Unit Exhaust Valve Fails To Vent I TOPlx

4/15/2016

6
NOTE: DOW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of
zero
TIME
CONDITION
CAUSAL
DESCRIPTION
SRO
(HOURS)
CODE
PART
Suspension air supply unit exhaust valve - Renew - LR4 (L319)

64.50.05

0.6

41

LR078650

Suspension air supply unit - Renew - LR4 (L319)

60.50.10

0.5

41

LR078650

Read and clear DTCs - LR4 (L319)

12.90.16

0.2

42

LR078650

Suspension air supply unit exhaust valve - Renew - Range Rover Sport (L494; with
third row seating)

64.50,05,50

0.5

41

LR069693

Suspension air supply unit exhaust valve - Renew - Range Rover Sport (L494;
without third row seating)

64.50.05

0.7

41

LR069693

Suspension air supply unit - Renew - Range Rover Sport (L494; with third row
seating)

60.50.10.50

0.4

41

LR069693

Suspension air supply unit - Renew - Range Rover Sport (L494; without third row
seating)

60.50.10

0.5

41

LR069693

Read and clear DTCs - Range Rover Sport (L494)

12.90.16

0.2

42

LR069693

Suspension air supply unit exhaust valve - Renew - Range Rover (L405)

64.50.05

0.7

41

LR069691

Suspension air supply unit - Renew - Range Rover (L405)

60.50.10

0.5

41

LR069691

Read and clear DTCs - Range Rover (L405)

12.90.16

0.2

42

LR069691

6 , NOTE: Normal Warranty procedures apply.

COMPONENT LOCATION:
1. 6
NOTE: Range
Rover Sport
(L494) shown;
LR4 (L319),
Range Rover
(L405) similar.
Suspension air
supply unit location.

3

E1 52567

SERVICE INSTRUCTION:
http://topix.landrover.jlrext.com/topix/content/document/view?id=644182

2/6

LTB00793NAS2 - Suspension Air Supply Unit Exhaust Valve Fails To Vent I TOPlx

4/15/2016

. &cAUTION: before disconnecting or removing components, make sure the area around the joint faces and connections are clean.
Plug open connections to prevent contamination.
6

NOTE: removal steps in this procedure may contain installation details.

1. Remove the suspension air supply unit (see T0Pix Workshop Manual, section 204-05: Vehicle Dynamic Suspension).

2. 6

NOTE: Range Rover Sport (L494) and Range Rover (L405) vehicles only.

Remove the suspension air supply unit cover.

El61582

All vehicles.
3. Check for white
powder at the
silencer.

• If white powder
is present at the
silencer (A),
replace the
suspension air
supply unit (see
T0Pix Workshop
Manual, section
204-05: Vehicle
Dynamic
Suspension).
• Once the
new
compressor
is fitted,
continue to
Steps 1118.

• If no white
powder is
present at the
silencer (B),
replace the
suspension air
supply unit
exhaust valve.
• Continue
to:
• Range
Rover
Sport
(L494)
and
Range
Rover
(L405) Steps 418.
• LR4
(L319) Steps 718.

http://topix.landrover.jlrext.com/topix/content/document/view?id=644182

3/6

LTB00793NAS2 - Suspension Air Supply Unit Exhaust Valve Fails To Vent I TOPlx

4/15/2016
6

NOTE: Steps 4-6: Range Rover Sport (L494} and Range Rover (L405} vehicles only.

4. Remove the retaining screw.
• Remove the electrical wiring cover.
• Torque: 1 Nm

S. Remove the suspension air supply unit retaining bolts.
• Torque: 10 Nm

6. &
cAUTION: step 6: Range Rover Sport (L494} and Range Rover (L405}
vehicles only. Before replacing the upper cover, make sure that the intake
hose and filter are fitted in their correct positions. Failure to follow this
instruction may cause damage to the component.
Reposition the suspension air supply unit to access the exhaust valve.

7. 6
NOTE: LR4 (L319} suspension air supply unit shown; Range Rover Sport
(L494} and Range Rover (L405} similar.
Remove the electrical connector from the exhaust valve of the suspension air supply
unit.

http://topix.landrover.jlrext.com/topix/content/document/view?id=644182

4/6

LTB00793NAS2 - Suspension Air Supply Unit Exhaust Valve Fails To Vent I TOPlx

4/15/2016

8. 6

NOTE: note the installed position before removal.

Remove the retaining screws from the exhaust valve of the suspension air supply
unit.
• Remove the exhaust valve from the suspension air supply unit.
• Torque: 3 Nm

9 . .fficAUTION: when removing the suspension air supply unit exhaust valve,
all three O rings must be removed from the suspension air supply unit.
Make sure all three 0 rings on the exhaust valve have been removed from the
suspension air supply unit.

10. To install the new suspension air supply unit exhaust valve, reverse the removal procedure .

.fficAUTION: a Jaguar Land Rover-approved Midtronics battery power supply must be connected to the vehicle battery during SDD
diagnosis / module programming .
.ffi.C AUTION: ensure all ignition 'ON' / ignition 'OFF' requests are carried out; failure to perform these steps may cause damage to
control modules in the vehicle.

11. Connect the Jaguar Land Rover-approved Midtronics battery power supply to the vehicle battery.
12. Turn ignition ON (engine not running).
http://topix.landrover.jlrext.com/topix/content/document/view?id=644182

5/6

4/15/2016

LTB00793NAS2 - Suspension Air Supply Unit Exhaust Valve Fails To Vent I TOPlx

13. Connect the Jaguar Land Rover-approved diagnostic tool to the vehicle and begin a new session.
14. Follow the on-screen prompts, allowing the diagnostic tool to read the VIN and identify the vehicle and initiating the data collect sequence.
15. Read and clear all diagnostic trouble codes (DTC).
16. Follow all on-screen instructions to complete this task.
17. Exit the current session.

18. Disconnect the diagnostic tool and battery power supply from the vehicle.

http://topix.landrover.jlrext.com/topix/content/document/view?id=644182

6/6