Test C: Powertrain Control Module (Pcm) Does Not Respond To NGS Tester
- Turn ignition off. Disconnect NGS tester. Disconnect PCM connector located in right side of engine compartment, on firewall. Inspect connector for loose, damaged or corroded terminals. Repair connector as necessary and retest system for normal operation. If connector is okay, go to next step.
- Measure resistance between terminal No. 16 (Gray wire) at PCM connector and terminal No. 2 (Gray/Violet wire) at Data Link Connector (DLC). See Figure and Fig 1. If resistance is less than 5 ohms, go to step 4). If resistance is 5 ohms or more, go to next step.
- Disconnect 42-pin connector C3001 located near left strut tower. Measure resistance between terminal No. 4 (Gray wire) at connector C3001 and terminal No. 2 (Gray/Violet wire) at DLC. See Figure and Fig 2. If resistance is less than 5 ohms, repair open in Gray wire between connector C3001 and PCM. Retest system for normal operation. If resistance is 5 ohms or more, repair open in Gray or Gray/Violet wire between connector C3001 and DLC. Retest system for normal operation.
- Measure resistance between terminal No. 15 (Blue wire) at PCM connector and terminal No. 10 (Blue/White wire) at DLC. See Figure and Fig 1. If resistance is less than 5 ohms, go to step 6). If resistance is 5 ohms or more, go to next step.
- Disconnect 42-pin connector C3001 located near left strut tower. Measure resistance between terminal No. 12 (Blue wire) at connector C3001 and terminal No. 10 (Blue/White wire) at DLC. See Figure and Fig 2. If resistance is less than 5 ohms, repair open in Blue wire between connector C3001 and PCM. Retest system for normal operation. If resistance is 5 ohms or more, repair open in Blue or Blue/White wire between connector C3001 and DLC. Retest system for normal operation.
- Measure resistance of White/Blue wire between terminal No. 13 (White/Blue wire) at PCM connector and terminal No. 13 at DLC. If resistance is less than 5 ohms, replace PCM and retest system for normal operation. If resistance is 5 ohms or more, go to next step.
- Disconnect 42-pin connector C3001 located near left strut tower. Measure resistance of White/Blue wire between terminal No. 2 at connector C3001 and terminal No. 13 at DLC. If resistance is less than 5 ohms, repair open in White/Blue wire between connector C3001 and PCM. Retest system for normal operation. If resistance is 5 ohms or more, repair open in White/Blue wire between connector C3001 and DLC. Retest system for normal operation.
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.