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Home >> Volvo >> 2004 >> XC90 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 4 Of 13 >> ECM-291B: Fuel Pump Control Module. Signal Missing (B5254T2; 2005-2007) >> Signal Too High/Signal Too Low/Signal Missing (2005) >> Checking Components And Wiring

Checking Components And Wiring

Check the pump control module connector. Check for contact resistance and oxidation.

Check the cable between Engine Control Module (ECM) terminal #B47 (#B57) and pump control module terminal #1. Check for an open circuit, short circuit to ground and supply voltage.

Remedy as necessary.

HINT: The diagnostic trouble code (DTC) may be caused by a defective pump control module. 

Other information: 

Fig 1: Identifying 6-Bit Connector
GLL108090Courtesy of VOLVO CARS CORPORATION
Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
GLL100563Courtesy of VOLVO CARS CORPORATION
Fig 3: Identifying Fuel Pump (FP) Control Module
GLL107944Courtesy of VOLVO CARS CORPORATION