Test 9A - No Response From Powertrain Control Module
- If engine does not run, see the appropriate TESTS W/O CODES article in the ENGINE PERFORMANCE section. See 4.0L 6-Cylinder, see: TESTS W/O CODES - 4.0L 6-CYL and 5.2L V8, see: TESTS W/O CODES - 5.2L V8 . If engine runs, turn ignition off. Disconnect Powertrain Control Module (PCM). PCM is located at right corner of firewall. Turn ignition on. Connect jumper wire between ground and PCM connector, terminal No. C30 (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 terminal No. C28 (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 PCM.
NOTE:
For connector terminal ID, see CONNECTOR IDENTIFICATION
and WIRING DIAGRAM
. After each repair, perform VERIFICATION TEST VER-1.
CAUTION:
Always turn ignition off prior to disconnecting any module connector.