Chrysler Crossfire. Manual — part 734
(P0710) TRANS TEMP SENSOR SHORTED
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NAG1 - ELECTRICAL DIAGNOSTICS
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(P0710) TRANS TEMP SENSOR SHORTED (CONTINUED)
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.
POSSIBLE CAUSES
TEMP SENSOR - P/N SWITCH CIRCUIT SHORT TO GROUND
TEMP SENSOR - P/N SWITCH CIRCUIT SHORT TO OTHER CIRCUITS
TRANSMISSION TEMP SENSOR - P/N SWITCH
TRANSMISSION CONTROL MODULE
For a complete Transmission Control Module Circuit Diagram, (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTO-
MATIC - NAG1 - SCHEMATICS AND DIAGRAMS).
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
T
, read Engine DTCs. Check and repair all engine
DTCs prior to performing transmission symptom diagnostics.
With the DRB III
T
, 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
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NAG1 - ELECTRICAL DIAGNOSTICS
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(P0710) TRANS TEMP SENSOR SHORTED (CONTINUED)
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. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
TRANSMISSION CONTROL MODULE - REMOVAL).
Perform NAG1 TRANSMISSION VERIFICATION TEST.
No
>> Check for a poor terminal to pin connections at the Trans-
mission Solenoid Assembly harness connector and repair
as necessary. If no problems are found in the connector,
replace the Transmission Temperature Sensor - P/N Switch. (Refer to 21 - TRANSMISSION/TRANS-
AXLE/AUTOMATIC - NAG1/ELECTROHYDRAULIC UNIT - REMOVAL).
Perform NAG1 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. (Refer to 21 - TRANSMISSION/
TRANSAXLE/AUTOMATIC - NAG1/ELECTROHYDRAULIC UNIT - REMOVAL).
Perform NAG1 TRANSMISSION VERIFICATION TEST.
No
>>
Go To 5
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NAG1 - ELECTRICAL DIAGNOSTICS
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(P0710) TRANS TEMP SENSOR SHORTED (CONTINUED)
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.
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. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
TRANSMISSION CONTROL MODULE - REMOVAL).
Perform NAG1 TRANSMISSION VERIFICATION TEST.
No
>> Repair the Temp Sensor - P/N Switch circuit for a short to
other circuit(s).
Perform NAG1 TRANSMISSION VERIFICATION TEST.
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