Test 5: No Codes
- Continuity Check (STI)
Disconnect positive battery cable. Disconnect ISC-E processor. Set VOM on 200 ohm scale. Measure resistance between processor connector Pin 16 and Self-Test Input (STI) connector. Resistance should be less than 5 ohms. If resistance is less than 5 ohms, go to next step. If not, service harness and repeat quick test.
- Continuity Check (STO)
Set VOM on 200 ohm scale. Measure resistance between processor connector Pin 18 and Self-Test Output (STO) connector. Resistance should be less than 5 ohms. If resistance is less than 5 ohms, go to next step. If not, service harness and repeat quick test.
- Continuity Check (GROUND)
Set VOM on 200 ohm scale. Measure resistance between negative battery cable and Self-Test ground connector. Resistance should be less than 5 ohms. If resistance is less than 5 ohms, go to next step. If not, service harness and repeat quick test.
- Continuity Check (GROUND)
Set VOM on 200 ohm scale. Measure resistance between negative battery cable and processor connector Pin 24. Resistance should be less than 5 ohms. If resistance is less than 5 ohms, go to next step. If not, service harness and repeat quick test.
- Continuity Check (POWER)
Set VOM on 200 ohm scale. Measure resistance between positive battery cable and processor connector Pin 1. Resistance should be less than 5 ohms. If resistance is less than 5 ohms, go to next step. If not, service harness and repeat quick test.
- Continuity Check (IGNITION RUN)
Set VOM on 200 ohm scale. Measure resistance from processor connector Pin 14 to ignition run circuit 687. Resistance should be less than 5 ohms. If resistance is less than 5 ohms, replace ISC-E processor and repeat quick test. If not, service harness and repeat quick test.