Test 16A - No Response From Transmission Control Module
NOTE:
For connector terminal identification see CONNECTOR IDENTIFICATION
. For wiring diagrams, see WIRING DIAGRAMS
. Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE
.
CAUTION:
Always turn ignition off prior to disconnecting any module connector.
- Disconnect Transmission Control Module (TCM). TCM is located at left fenderwell, next to power distribution center. Turn ignition on. Connect jumper wire between ground and TCM connector terminal No. 43 (Violet/Dark Green wire).
- Using scan tool, select BODY, BODY COMPUTER, then SYSTEM TEST. Perform CCD BUS test. If scan tool does not display BUS SHORT TO GROUND, go to step 5). If scan tool displays BUS SHORT TO GROUND, go to next step.
- Move jumper wire to terminal No. 4 (White/Dark Green wire). Perform CCD BUS test. If scan tool displays BUS SHORT TO GROUND, replace TCM. If scan tool does not display BUS SHORT TO GROUND, go to next step.
- Connect jumper wire to ground and backprobe Body Control Module (BCM) 14-pin connector terminal No. 14 (White/Dark Green wire). Perform CCD BUS test. If scan tool does not display BUS SHORT TO GROUND, replace BCM. If scan tool displays BUS SHORT TO GROUND, repair open White/Dark Green wire.
- Connect jumper wire between ground and Body Control Module (BCM) 14-pin connector, terminal No. 6 (Violet/Dark Green wire). Perform CCD BUS test. If scan tool does not display BUS SHORT TO GROUND, replace BCM. If scan tool displays BUS SHORT TO GROUND, repair open Violet/Dark Green wire.