Engine Controls - Reduced Power/DTC's P0096/P601
No.: LTB00041Issue: 2
Date: May 24, 2007
SECTION: 303-03D
Reduced Power Under Load Possible DTC P0096 and/or P2601 Stored
AFFECTED VEHICLE RANGE:
*Range Rover (LM) Supercharged 6A198058 to 7A261419*
Range Rover Sport (LS) Supercharged 6A901924 to 7A109767
ISSUE 2 CHANGES ARE HIGHLIGHTED WITH GREY BACKGROUND AND SHOWN WITH ASTERISKS.
CONDITION SUMMARY:
REDUCED POWER OR MISFIRE AT HIGH ENGINE LOADS
Situation:
The customer may complain of reduced power and or a misfire at high engine loads and road speeds, with the possibility of Diagnostic Trouble Codes (DTC) P0096 and/or P2601 stored. The electrical harness power supply and ground for the auxiliary coolant pump may be cross connected in connector C3006. The pump will run backwards causing the Engine Control Module (ECM) to reduce power to prevent damage because the pump flow is low. The auxiliary coolant pump will be degraded under these conditions.
Action:
Should a customer express concern, modify the wiring at connector C3006 to the correct positions:
PARTS:
PEB500010........Supercharger coolant pump Qty 1
TOOLS:
YRW9000010.............Terminal extractor tool
WARRANTY:
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 DDW to obtain the latest repair time.
DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of zero.
*INSPECT WIRING, CHECK P-CODES AND IF INDICATED REPLACE PUMP*
NOTE:
Check the Warranty claims history in DDW to determine if the repair covered in this Technical Bulletin has been previously completed.
1. Release the connector locking tab and disconnect connector C3006 from the coolant pump (Figure 1)
*CAUTION:
Connector information in both the Range Rover and Range Rover Sport Electrical Library contain potentially confusing information Wiring should be as outlined below.*
2. Inspect the wires to determine if they are crossed.
*Correct orientation Range Rover Sport (LS) is:*
^ Black (B) wire in Cavity 1 connected to "-" pump connection
^ Brown and Purple (NP) wire in Cavity 2 connected to "+" pump connection
*Correct orientation for Range Rover (LM) is:
^ Brown (N) wire in Cavity 1 connected to "-" pump connection
^ Red and White (RW) wire in Cavity 2 connected to "+" pump connection*
3. If the wires are crossed, use terminal extractor tool YRW9000010 from the Harness Repair Kit and swap cavity 1 and cavity 2 wires *to the positions indicated above.*
CAUTION:
A Midtronics PSC-550 Vehicle Power Supply must be connected to the vehicle battery during diagnosis.
4. If the wires were not crossed in connector C3006, perform the following IDS check:
^ Connect the Midtronics PSC-550 power supply to the vehicle battery.
^ Connect IDS to the vehicle and begin a new diagnostic session, by entering the correct VIN for the current vehicle.
^ Follow the IDS prompts to read the vehicle configuration.
^ Using IDS determine if trouble codes P0096 and/or P2601 are stored.
5. If the P-codes are present, or the wires were crossed, remain in the IDS session, but temporarily disconnect the VCM from the vehicle and disconnect the battery charger/power supply.
NOTE:
Global Technical Reference (GTR) lookup sequence is as follows:
GTR Home> NAS > Service Information/ LS - Range Rover Sport >2007 > Workshop Manuals Range Rover Sport Workshop Manual 2007> Bookmark "Powertrain> Engine> 303-03D Supercharger Cooling" Link "Coolant Pump (26.50.26)".
6. If the wires were crossed in connector C3006 or the fault codes P0096 or P2601 are stored, refer to GTR section: 303-03D (26.50.26) and install a new supercharger coolant pump.
7. *If the coolant pump is replaced perform a final IDS check as follows:*
^ Connect the battery charger and re-connect the VCM to continue the session.
^ Use IDS, following the on-screen instructions, to clear DTCs.
^ When the task is completed, exit the current session.
8. Disconnect IDS and the battery charger/power supply.
Disclaimer