Checking The Park/Neutral Position (PNP) Function In The Gear Position Sensor (Only Vehicles With Automatic Transmission): Notes

NOTE: For the test to be carried out the battery must be fault free and the starter motor relay and starter motor and corresponding wiring must be checked.

CAUTION: Avoid touching the pins in the control module and the corresponding connector on the cable harness. There is a risk of static discharge which could damage the control module. Discharge yourself and tools to be used by holding the tool's metal part and touching a body part on the car just before starting to work.

Fig 1: Checking Traffic Load On CAN Cables

Courtesy of VOLVO CARS CORPORATION

Ignition on.
When the gear position sensor is in position P or N the Engine Control Module (ECM) receives signals from the Transmission Control Module (TCM) that start is permitted.
The gear selector shall be in position P or N.
Parking brake applied.
Check the voltage between the Engine Control Module (ECM) terminals #B15 and #B1.

The voltage must be 0 V.

Other information
- See Connecting breakout box for Engine Control Module (ECM).
- See Signal specification for Engine Control Module (ECM).

Is the voltage OK?

YES
Refer to REPLACING A COMPONENT
NO
Refer to CHECKING THE WIRING AND TERMINALS