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Technical Case Study - Infield 4x4

Air suspension fault displayed on instrument cluster of a RANGE ROVER 2013 chassis

 
Customer: Infield 4x4 - Will Kendrick
Brand: Land Rover
Model: Range Rover
Year: 2013
Channel of communication: AutologicMobile
Autologic Technician: Terry Oakford

Symptoms

Air suspension fault displayed on instrument cluster.

Fault codes

C1041-22 Front Axle Piston Pressure Sensor [Signal Amplitude > Maximum]
C1043-22 Rear Axle Piston Pressure Sensor [Signal Amplitude > Maximum
Autologic’s Jaguar/Land Rover Support Technician, Terry Oakfield, advises and supports Will Kendrick from Infield 4x4 on a Range Rover 2013 model year suspension fault.
 
Will was experiencing a dynamic suspension fault and required guidance in finding and fixing the fault.
 
Using Autologic diagnostic software and extensive product knowledge for Jaguar/Land Rover, Terry provides Will with the necessary steps to find the fault using the fault codes and initial information provided.

Recommended Fix

To begin, Terry suggest some initial ‘first checks’ to begin the process of identifying the fault:

Fault code C1041-22 Front Axle Piston Pressure Sensor - Signal amplitude > maximum
  • Dynamic response front actuator piston-side pressure regulating valve coil negative circuit - Short circuit to ground sensor fault
  • Dynamic response front actuator piston-side pressure regulating valve - Internal failure
  1. Check the dynamic response front actuator piston-side pressure regulating valve coil negative circuit for short circuit to ground.
    • Repair circuit as required, clear DTC and retest.
  1. If fault persists, check and install a new dynamic response valve block as required and reset adaptive data. Clear DTC and retest.
C1043-22 Rear Axle Piston Pressure Sensor - Signal amplitude > maximum
 
  • Dynamic response rear actuator piston-side pressure regulating valve coil negative circuit - Short circuit to ground Sensor fault
  • Dynamic response rear actuator piston-side pressure regulating valve - Internal failure
  1. Refer to the electrical circuit diagrams and:
    1. Check the dynamic response rear actuator piston-side pressure regulating valve coil negative circuit for short circuit to ground.
    2. Repair circuit as required
    3. Clear DTC and retest
  1. If fault persists, check and install a new dynamic response valve block as required and reset adaptive data. Clear DTC and retest
Will explained that there was a valve block located on the underside LH centre inner sill, and that the fault still remained.
 
Terry then asked Will to check the wiring on/near the rear actuator piston-side pressure regulating valve coil:

Wiring to this valve

Negative circuit – black/grey wire
Positive circuit – Black/violet wire

At valve block

Black 4 pin connector front of block
Pin 1 – black/grey wire
Pin 4 – black/violet wire

In line connector

Black 12 pin connector in front of the valve block
Pin 10 – black/violet wire
Pin 4 - black/grey wire

At the module – O/S/F near throttle pedal

Pin 4 – black/grey wire
Pin 5 – black/violet wire
 
Terry explained that as the code states negative circuit short to ground, the code is pointing towards the black/grey wire being shorted to vehicle ground. He suggests overlaying this wire between the module and the valve and test.
 
Will changed the block and tested the wires going to the box next to accelerator pedal and reported to Terry that the wires appeared to be fine, and that the fault still remained.
 

Terry then suggested checking the pressure sensor wiring

Repair

Autologic supports thousands of technicians and workshop owners with OEM brand-specific diagnostic support.
 
From symptom driven advice through to complex repair guidance, Autologic provide the knowledge and expertise to get from fault diagnosis to successful repair in minimal time, reducing costs and downtime for today’s modern workshop.
For more information on how Autologic can support your workshop, visit: www.uk.autologic.com or contact: sales-uk@autologic.com .