Diagnostic Procedure

DIAGNOSTIC PROCEDURE

CAUTION:
A Midtronics PSC-550 Vehicle Power Supply must be connected to the vehicle battery during diagnosis.

1. Connect the Midtronics PSC-550 Vehicle Power Supply to the vehicle battery.

2. Connect IDS to the vehicle and begin a new diagnostic session, by entering the correct VIN for the current vehicle.

3. Read and record diagnostic trouble codes.

NOTE:
This procedure must be followed if any of the following codes are present: C1119 62, C1119 09, C1B 1162.

CAUTION:
If the dynamic response reservoir is empty, pump damage is likely to have occurred.

4. Check the dynamic response fluid level.

WARNING:
Whenever working under a vehicle the vehicle must be supported with safety stands.

NOTE:
Global Technical Reference (GTR) lookup sequence is as follows:

GTR Home > NAS > LS Range Rover Sport > Service Information/ 2007 > Workshop Manuals > Bookmark "Body and Paint/501-02 Front End Body Panels" LINK "Engine Undershield (76.10.50)"

5. If the fluid is low perform the following system inspection for leaks:

^ Raise and support the vehicle.

^ Refer to GTR Section 501-02 and remove the engine shield.





^ Remove the radiator access panel. (Figure 1)





^ Remove the right-hand (RH) splash shield. (Figure 2)

^ Inspect the dynamic response system for leaks.

6. If the fluid level is correct, use IDS to perform the following diagnostic response system test:

^ Select 'Special Applications'.

^ Select 'Dynamic Response Hydraulic Control - System Test'.





^ Demand 50 bar (725 psi) of pressure for up to five minutes or until the primary circuit pipes are hot. ([A] in Figure 3)

^ Check pipe temperature under RH wheel arch.

^ If 50 bar (725 psi) cannot be obtained, * refer to GTR Workshop Manual section 204-06 (60.60.23) to replace the faulty Pressure Control Valve (PCV) in the valve block*.

^ Open DCV1 and verify that system pressure is still 50 bar (725 psi).

^ Hold 50 bar (725 psi) pressure for two minutes.

^ If pressure has dropped by over 5 bar (72.5 psi), confirm in step 7 and replace the affected actuator.

^ Open DCV2 and verify that system pressure is still 50 bar (725 psi).

^ Hold 50 bar (725 psi) pressure for two minutes.

^ If pressure has dropped by over 5 bar (72.5 psi), confirm in step 7. The affected actuator will be replaced.

NOTE:
If the temperature comparison test is not conclusive at this stage, continued diagnosis revealing filter contamination (Condition B Figure 6) may indicate that the front actuator requires replacement.

7. Confirm which actuator is faulty by observing the follow symptoms:

^ If all four pipes in the front wheel arch area are hot and at a similar temperature the front actuator is faulty.

^ If the pipes in the rear wheel arch are hot, the rear actuator is faulty.

^ If the pressure has dropped, but there is no increase in the actuator pipes and rear pipes temperature ([B] in Figure 3), the valve block is faulty and requires replacement.