Inspection Procedure 45 - Injector Control Circuit
NOTE:
For Engine Control Module (ECM) terminal ID, See Figure
. For wiring diagram, see the WIRING DIAGRAMS
article.
- Access connectors on ECM. The ECM is located below instrument panel, just in front of center console.
- Ensure ignition is off. Disconnect 26-pin ECM connector B-53 from ECM.
- Turn ignition on. Using voltmeter, check voltage between ground and terminals No. 1 (Green wire), 2 (Green/Yellow wire), No. 14 (Yellow/Black wire) and No. 15 (Green/Red wire) on 26-pin ECM connector B-53. Battery voltage should exist.
- If battery voltage exists, go to step 6). If battery voltage does not exist, check for defective terminals or connections at each injector.
- If terminals or connections are defective, repair as necessary. If terminals and connections are okay, check for a trouble symptom. See the TROUBLE SYMPTOM INSPECTION . If no trouble symptom exists, check wiring harness between ECM and connector for injector. Repair wiring harness as necessary.
- Check for defective terminals or connections on 26-pin ECM connector B-53. If terminals or connections are defective, repair as necessary.
- If terminals and connections are okay, check for a trouble symptom. See the TROUBLE SYMPTOM INSPECTION . If no trouble symptom exists, replace ECM.