PCM Message Not Received; No Response From PCM
NOTE:
Perform body verification test after each repair. See BODY VERIFICATION TEST under VERIFICATION TESTS.
CAUTION:
Always turn ignition off prior to disconnecting any module connector.
- Disconnect Powertrain Control Module (PCM). PCM is located next to air filter housing. See COMPONENT LOCATIONS . Turn ignition on. Connect a jumper wire between ground and PCM connector terminal No. 59 (Violet/Brown wire). See Figure. Using scan tool, select BODY, BODY COMPUTER, SYSTEM TEST and perform CCD BUS test. If scan tool displays BUS SHORT TO GROUND, go to next step. If scan tool does not display BUS SHORT TO GROUND, go to step 5.
- Move jumper wire to terminal No. 60 (White/Black wire). Perform CCD BUS test. If scan tool displays BUS SHORT TO GROUND, replace PCM. See POWERTRAIN CONTROL MODULE (PCM) under REMOVAL & INSTALLATION. If scan tool does not display BUS SHORT TO GROUND, go to next step.
- Using a jumper wire, backprobe BCM 14-pin connector between ground and terminal No. 13 (White/Dark Green wire). See CONNECTOR IDENTIFICATION . Do not disconnect connector. Perform CCD BUS test. If scan tool does not display BUS SHORT TO GROUND, go to next step. If scan tool displays BUS SHORT TO GROUND, repair open in White/Dark Green wire.
- Replace BCM. See BODY CONTROL MODULE (BCM) under REMOVAL & INSTALLATION.
- Using a jumper wire, backprobe between ground and BCM 14-pin connector terminal No. 5 (Violet/Brown wire). Perform CCD BUS test. If scan tool does not display BUS SHORT TO GROUND, go to next step. If scan tool displays BUS SHORT TO GROUND, repair open in Violet/Brown wire.
- Replace BCM. See BODY CONTROL MODULE (BCM) under REMOVAL & INSTALLATION.