NASF TSB #LTB00041, Rev 2
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
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:
RR Sport Range Rover
• Cavity 1 connected to "-" pump connection Black (B) Brown (N)
• Cavity 2 connected to "+" pump connection Brown / Purple (NP) Red / White (RW)
Install a new supercharger coolant pump as part of the repair if either the fault codes or the incorrect wiring is discovered following the Repair Procedure outlined below.