Checking components and wiring
Check the cable between combustion preheater module (CPM) terminal #12 and water pump terminal 1. Check for a short-circuit to supply voltage.
HINT: With the ignition on and the water pump connector disconnected, the voltage between water pump terminal 1 (control module side) and ground should be approximately 0 V.
The water pump must be replaced if no faults are found in the cable.
Remedy as necessary.
Other information
- See Connecting the breakout box
- See Signal specification
- See Replacing the water pump for the engine coolant heater
- See Contents
- Continue
Refer to Verification
Check the cable between combustion preheater module (CPM) terminal #12 and water pump terminal 1. Check for an intermittent short-circuit to supply voltage.
Remedy as necessary.
Other information
- See Connecting the breakout box
- See Signal specification
- See Replacing the water pump for the engine coolant heater
- See Contents
- Continue
Refer to Verification