P0710

P0710 - TRANS TEMP SENSOR SHORTED





When Monitored and Set Condition

- When Monitored: Always monitored with system active.
- Set Condition: Temperature sensor input below a threshold, failed temperature sensor, short to ground, TCM.






Diagnostic Test


1. PRE-DIAGNOSTIC CHECK OUT





NOTE: Low fluid level can be the cause of many transmission problems. If the fluid level is low, locate and repair the leak then check and adjust the fluid level.

NOTE: Always perform diagnostics with a fully charged battery to avoid false symptoms.

With the DRB III(R), read Engine DTCs. Check and repair all engine DTCs prior to performing transmission symptom diagnostics.

With the DRB III(R), read and record all Transmission DTCs.


NOTE: Check connectors - Clean/repair as necessary. Poor pin to terminal connections can set DTCs.

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Repair as necessary.

Most DTCs set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run.


NOTE: Check for any Technical Service Bulletins that may apply.

Perform this procedure prior to Symptom diagnosis.

Continue

Go To 2



2. CHECK TO SEE IF ENGINE STARTS

Attempt to start the engine in Park and Neutral.

Does the engine start in either position, Park or Neutral?

Yes

Go To 3

No

Go To 4



3. TRANSMISSION TEMPERATURE SENSOR





Turn the ignition off.

Disconnect the TCM C2 harness connector.


NOTE: Check connectors - Clean/repair as necessary.

Place the gear selector in Drive.

Measure the resistance of the Transmission Temperature Sensor from the Temp Sensor - P/N Switch circuit to the Sensor Ground circuit at the TCM C2 harness connector.

Is the resistance between 500 ohms and 2500 ohms?

Yes

- Replace the Transmission Control Module.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. Transmission Verification Test

No

- Check for a poor terminal to pin connections at the Transmission Solenoid Assembly harness connector and repair as necessary. If no problems are found in the connector, replace the Transmission Temperature Sensor - P/N Switch.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. Transmission Verification Test



4. TRANSMISSION TEMP SENSOR - P/N SWITCH

Turn the ignition off.

Disconnect the Transmission Solenoid Assembly harness connector.


NOTE: Check connectors - Clean/repair as necessary.


NOTE: This procedure may set several DTCs in both the PCM and TCM. Disregard and erase DTCs after this procedure.

With the gear selector in park, attempt to start the engine.

Does the engine start?

Yes

- Replace the Transmission Temperature Sensor - P/N Switch Assembly.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. Transmission Verification Test

No

Go To 5



5. TEMP SENSOR - P/N SWITCH CIRCUIT SHORT TO GROUND





Turn the ignition off.

Disconnect the TCM C2 harness connector.


NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance between ground and the Temp Sensor - P/N Switch circuit.

Is the resistance above 100 kohms?

Yes

- Go To 6

No

- Repair the Temp Sensor - P/N Switch circuit for a short to ground.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. Transmission Verification Test



6. TEMP SENSOR - P/N SWITCH CIRCUIT SHORT TO OTHER CIRCUITS





With the ignition off.

Disconnect the TCM C1 harness connector.


NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance from the Temp Sensor - P/N Switch circuit to all other circuits in the TCM C1 and C2 harness connectors.

Is the resistance above 100 kohms for all measurements?

Yes

- Replace the Transmission Control Module.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. Transmission Verification Test

No

- Repair the Temp Sensor - P/N Switch circuit for a short to other circuit(s).
- Perform NAG1 TRANSMISSION VERIFICATION TEST. Transmission Verification Test