Pinpoint Test 38

Pinpoint Test 38: No Communication with the Restraints Control Module (RCM)

Normal Operation
The RCM communicates with the scan tool using ISO 9141 communication mode through the data link connector (DLC).

Possible Causes
A no-communication condition can be caused by:
- damage to circuit (LB/W).
- a damaged DLC.
- a damaged scan tool.
- an RCM internal concern.

WARNING: The air bag is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards.

NOTE: If a seat equipped with a seat-mounted side air bag system and/or a safety belt pretensioner (if equipped) system is being serviced, the air bag system must be deactivated using the appropriate deactivation procedure.

NOTE: Restraint system diagnostic tools MUST be installed under the seats in the side air bag and safety belt pretensioner to floor connectors.

NOTE: Diagnostics or repairs are not to be performed on a side air bag system and/or a safety belt pretensioner (if equipped) system with the seats in the vehicle. Prior to attempting to diagnose/repair the side air bag system and/or safety belt pretensioner (if equipped) system the seats must be removed from the vehicle and the restraint system diagnostic tools must be installed in the side air bag and the safety belt pretensioner (if equipped) connectors at the floor connectors. The restraint system diagnostic tools must be removed prior to operating the vehicle over the road.

NOTE: Diagnostics may be performed on seat systems other than the side air bag or the safety belt pretensioner (if equipped) system (lumbar, climate controlled, heated, power seat track) with the seat installed in the vehicle as long as the restraint system diagnostic tools are installed under the seats in the side air bag and safety belt pretensioner to floor connectors.

NOTE: After diagnosing/repairing a seat system, the restraint system diagnostic tools must be removed before operating the vehicle over the road.

Step 1 - 3:

Step 4:

Step 5:

TEST DESCRIPTION