P0714

(P0714) TRANS TEMP SENSOR ERRATIC





When Monitored and Set Condition
- When Monitored: When transmission temperature is below 170°C (338°F).
- Set Condition: When there is a 10°C (18°F) variation between each transmission temperature sensor read. If the DTC is reset (after an ignition cycle), the DTC will be set to Stored (Intermittent) status.

POSSIBLE CAUSES
- TRANSMISSION TEMP SENSOR CIRCUITS
- TRANSMISSION CONTROL MODULE

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 in accordance with the Service Information.

Note: Always perform diagnostics with a fully charged battery to avoid false symptoms.
With the DRB III*, read the engine DTCs. Check and repair all engine DTCs prior to performing transmission symptom diagnostics.
With the DRB III*, 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: Verify flash level of transmission controller. Some problems are corrected by software upgrades to the transmission controller.

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

Perform this procedure prior to Symptom diagnosis.
Continue
Go To 2

2. TRANSMISSION TEMP SENSOR CIRCUITS





Turn the ignition on.
With the DRB III*, monitor the Transmission Temperature.
With the brakes firmly applied, place the gear selector in Drive.
While monitoring the DRB III*, wiggle the wires and connectors from the TCM to the Transmission Solenoid Assembly.
Did the transmission temperature fluctuate while wiggling the wires?
Yes>>Repair the wiring and/or connectors as necessary.
Perform NAG1 TRANSMISSION VERIFICATION TEST.
No>>Go To 3

3. TRANS TEMP SENSOR - PARK NEUTRAL SWITCH





Replace the Transmission Temp Sensor - P/N Switch.
Perform NAG1 TRANSMISSION VERIFICATION TEST. With the DRB III*, read Transmission DTCs.
Did DTC (P0714) TRANS TEMP SENSOR ERRATIC set again?
Yes>>Replace the Transmission Control Module.
Perform NAG1 TRANSMISSION VERIFICATION TEST. Verification Tests
No>>Test Complete.