Test 4A - Powertrain Control Module No Response Condition
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION
. For wiring diagram, see the appropriate WIRING DIAGRAMS
article in the ENGINE PERFORMANCE section.
- WIRING DIAGRAMS - 2.5L TBI
- WIRING DIAGRAMS - 2.5L FLEXIBLE FUEL
- WIRING DIAGRAMS - 3.0L
- Using scan tool, read Powertrain Control Module (PCM) status. If scan tool displays ACTIVE ON THE BUS, replace traveler module. If scan tool does not display ACTIVE ON THE BUS, go to next step.
- Turn ignition switch off. Disconnect PCM connector. PCM is located in engine compartment, outboard of battery. DO NOT disconnect scan tool from Data Link Connector (DLC). Using an external ohmmeter, check resistance of Violet/Brown wire between PCM connector terminal No. 26 and DLC terminal No. 6. If resistance is more than 5 ohms, repair open Violet/Brown wire. If resistance is less than 5 ohms, go to next step.
- Check resistance of White/Black wire between PCM connector terminal No. 46 and DLC terminal No. 4. If resistance is more than 5 ohms, repair open White/Black wire. If resistance is less than 5 ohms, replace PCM.