91boostedgst
10+ Year Contributor
- 38
- 0
- Feb 28, 2012
-
Scottsbluff,
Nebraska
My question is what the title says.any help/advice would be great
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Quoted from autozone.com
1. Attach the connector, use test harness MD998478 or equivalent.
2. With the engine cranking, check the voltage between the No. 2 terminal (black clip) and ground. It should be 0.4-4.0 volts.
3. With the engine idling, check the voltage between the No 2 terminal (black clip) and ground. It should be 1.5-2.5 volts.
4. If these specifications are met, the sensor and wiring is fine and the PCM may be faulty.
5. Detach the sensor connector and measure at the harness side. Attach an ohmmeter.
6. With the ignition switch ON , measure the voltage between terminal No. 3 and ground.
There should be positive battery voltage.
7. With the ignition switch ON , measure the voltage between terminal No. 2 and ground. It should be 4.8-5.2 volts.
8. Check to see if there is continuity between terminal No. 1 and ground, there should be continuity.
9. If the voltage readings are correct, and there is continuity, replace the sensor. If not, repair or replace the harness, or the PCM may be faulty.