Test NTC-3A: Checking Pcm Power & Grounds
NOTE:
Perform TEST NTC-1A: NO TROUBLE CODES (NTC) TESTS or TEST NTC-12A: CHECKING IDLE AIR CONTROL MOTOR before proceeding.
- Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect one end of a 12-volt test light to B+. Connect other end of test light to PCM connector terminals No. 10, 47 and 50. See PCM CONNECTOR WIRE IDENTIFICATION table. If test light is brightly illuminated on all circuits, go to next step. If test light is not brightly illuminated, repair appropriate circuit for high resistance to ground. See TEST VER-2A: ROAD TEST VERIFICATION .
- Turn ignition on. Using a 12-volt test light connected to ground, check voltage of PCM connector terminal No. 20. See PCM CONNECTOR WIRE IDENTIFICATION table. If test light is brightly illuminated, go to next step. If test light is not brightly illuminated, repair open or high resistance on fused ignition switch output circuit. Perform TEST VER-2A: ROAD TEST VERIFICATION .
- Turn ignition off. Reconnect PCM connectors. PCM power and ground circuits are okay. Test is complete.
PCM CONNECTOR WIRE IDENTIFICATION
| Application | Wire Color | |
|---|---|---|
| PCM Ground Circuits | ||
| PCM Terminal No. 10 | Black/Tan | |
| PCM Terminal No. 47 | Black/White | |
| PCM Terminal No. 50 | Black/Tan | |
| PCM Fused B+ Circuit | ||
| PCM Terminal No. 46 | Red/White | |
| PCM Fused Ignition Switch Output Circuit | ||
| PCM Terminal No. 20 | Dark Blue/White | |
| PCM 5-Volt Supply Circuit | ||
| PCM Terminal No. 61 | Violet/White | |