TwinTurbo.NET: Nissan 300ZX forum - Testing Coolant Temperature Sensor Circuit
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Subject Testing Coolant Temperature Sensor Circuit
     
Posted by njz on March 14, 2011 at 8:07 AM
  This message has been viewed 1367 times.
     
In Reply To What I ended up doing was disconnect the coolant posted by Worm Boy on March 13, 2011 at 10:05 PM
     
Message 1. Unplug Coolant Temp Connector
2. Unplug ECU Connector
3. Unplug TPS connector
4. Set meter to 10-200 ohms
5. Place Red lead to pin 28 of the ECU connector
6. Place Black lead to pin 30 of the ECU connector
You should see an open condition (go to 7)

7. Keep Red lead on pin 28 and place the Black lead to a body ground
You should see an open condition. Repeat the same for pin 30

8. Test Continuity between pin 30 and TPS (black wire)
Continuity = YES

Loop Test (Short)

9. Place Red lead to pin 28 of the ECU connector
10. Place Black lead to pin 30 of the ECU connector
Place Jumper across Temp sensor connector pins
Continuity = YES

     
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