Test 8A - No Response From Transmission Control Module
NOTE:
For connector terminal identification see CONNECTOR IDENTIFICATION
. For wiring diagrams, see WIRING DIAGRAMS
. Perform VERIFICATION TEST VER-1A
after each repair.
CAUTION:
Always turn ignition off prior to disconnecting any module connector.
- Determine if transmission is operating correctly before proceeding with following test. See article in the appropriate AUTOMATIC TRANSMISSIONS Section as needed.
- Turn ignition off. Disconnect Transmission Control Module (TCM). TCM is located on right fenderwell, next to washer reservoir. Turn ignition on. Connect jumper wire between ground and TCM connector terminal No. 43 (Violet/Brown 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, repair open Violet/Brown wire. If scan tool displays BUS SHORT TO GROUND, go to next step.
- Move jumper wire to TCM connector terminal No. 4 (White/Black wire). Perform CCD BUS test. If scan tool does not display BUS SHORT TO GROUND, repair open White/Black wire. If scan tool displays BUS SHORT TO GROUND, replace TCM.