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 Contents
• For resistance values, see Component specifications
• To connect the breakout box, see Connecting the breakout box
• For information about signals on 5 cylinder engines, see Signal specification or Signal specification
• See Leak diagnostic pump, replacing .

Fig 1: Identifying Leak Diagnostic Unit Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Leak Diagnostic Pump

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to Information