Test N - Neutral/A/C Switch Input
- Turn ignition off and wait 10 seconds. Ensure heater and A/C off. Transmission in Neutral or "P". Disconnect 60-pin connector at ECA and inspect. Install breakout box and reconnect ECA. Turn ignition on and place DVOM on 20 volt scale. Measure voltage between box pin 30 and chassis ground. If less than .5 volt, proceed to step 3 . If not, proceed to next step.
- Turn ignition off and wait 10 seconds. With breakout box installed and ECA connected. Locate neutral drive switch. Disconnect harness at switch. With DVOM on 200 ohm scale, measure resistance across switch contacts. If less than 5 ohms, correct open circuit and repeat QUICK TEST . If 5 ohms or more, replace defective switch and repeat QUICK TEST .
- Reconnect neutral drive switch, with breakout box and ECA still connected. With DVOM on 20 volt scale, turn A/C switch off. Turn ignition switch on and measure voltage from box pin 10 to chassis ground. If 1 volt or more, repair short to power in circuit and repeat QUICK TEST . If less than 1 volt, replace ECA and repeat QUICK TEST .