Diagnostic Test

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

1) CHECK FOR SHIFT LEVER ASSEMBLY DTCS
With the scan tool, check for Shift Lever Assembly DTCs.

Are there any Shift Lever Assembly DTCs present?

Yes
1. Refer to NAG1 - SHIFTER DIAGNOSTICS and perform the appropriate symptom.
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
1. Go To step 2).
2) CHECK THE SHIFT LEVER ASSEMBLY CABLE FOR PROPER ADJUSTMENT
Check the Shift Lever Assembly Cable for proper adjustment. Refer to AUTOMATIC TRANSMISSION-AUTOMATIC TRANSMISSION NAG1/SERVICE INFORMATION for the appropriate service procedure.

Is the Shift Lever Assembly Cable for properly adjusted?

Yes
1. Go To step 3).
No
1. Adjust the Shift Lever Assembly Cable per the Service Information. (Refer to TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1/GEAR SHIFT CABLE - ADJUSTMENTS)
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .
3) CHECK THE (T54) TEMPERATURE SENSOR-P/N SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 1: Checking Temperature Sensor-P/N Switch Signal Circuit For Short To Ground
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off to the lock position.

Disconnect the TCM C2 harness connector.

Measure the resistance between ground and the (T54) Temperature Sensor-P/N Switch Signal circuit.

Is the resistance below 5.0 ohms?

Yes
1. Repair the (T54) Temperature Sensor-P/N Switch Signal circuit for a short to ground.
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
1. Go To step 4).
4) CHECK THE (T54) TEMPERATURE SENSOR-P/N SWITCH SIGNAL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT

Fig 2: Checking Temperature Sensor-P/N Switch Signal Circuit For Short To Another Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Disconnect the TCM C1 harness connector.

Disconnect the Transmission Electrohydraulic Control Unit Assembly harness connector.

Measure the resistance between the (T54) Temperature Sensor-P/N Switch Signal circuit and all other circuits in the TCM C1 and C2 harness connectors.

Is the resistance below 5.0 ohms between the (T54) Temperature Sensor-P/N Switch Signal circuit and any other circuit(s)?

Yes
1. Repair the (T54) Temperature Sensor-P/N Switch Signal circuit for a short to another circuit(s).
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
1. Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/TRANSMISSION CONTROL MODULE - DESCRIPTION)
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .