Checking The Wiring

Check the signal cable between engine control module (ECM) terminal #B7 (#B17) and leak diagnostic unit terminal #1. Check for a short-circuit to ground.

Try a new leak diagnostic unit if no fault is found during the above fault-tracing.

Remedy as necessary.

Other information: 

• see CHECKING WIRING AND TERMINALS
• For resistance values, see COMPONENT SPECIFICATIONS
• To connect the breakout box, see CONNECTING THE BREAKOUT BOX
• For 5 cylinder turbocharged engines -2004, see SIGNAL DESCRIPTION
• For 6 cylinder engines -2004, see SIGNAL SPECIFICATION
• To access or replace the leak diagnostic unit, see LEAK DIAGNOSTIC PUMP, REPLACING .

Fig 1: Identifying Leak Diagnostic Unit Connector Terminals

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying Ohm Meter

Courtesy of VOLVO CARS CORPORATION

Fig 3: Identifying Leak Diagnostic Pump

Courtesy of VOLVO CARS CORPORATION

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  Refer to INFORMATION