MHSMM Messages Not Received
NOTE:
After making any repairs, perform MEMORY SYSTEMS VERIFICATION TEST
under VERIFICATION TESTS.
- Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, select BODY, then MEMORY SEAT MODULE. If scan tool communicates with Memory Heated Seat/Mirror Module (MHSMM), go to next step. If scan tool does not communicate with MHSMM, perform BUS +/- SIGNALS OPEN FROM MEMORY HEATED SEAT/MIRROR MODULE test.
- Using scan tool, clear DTCs. Turn ignition off. Turn ignition on, and wait one minute. Using scan tool, retrieve DTCs. If MHSMM MESSAGES NOT RECEIVED DTC resets, replace Body Control Module (BCM). If MHSMM MESSAGES NOT RECEIVED DTC does not reset, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.