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) DETERMINE IF RELATED TCM POWER INPUT DTCS ARE PRESENT
With the scan tool, read Transmission DTCs.

Are there any TCM Power Input DTCs present also?

Yes
1. Perform appropriate DTC test(s) in this article.
No
1. Go To step 2).
2) CHECK FOR LOSS OF PRIME DTC
With the scan tool, check for other Transmission DTC's.

Is the DTC P0944 present also?

Yes
1. Perform appropriate DTC test(s) in this article.
2. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1
No
1. Go To step 3).
3) CHECK TO SEE IF P0846 IS CURRENT
With the scan tool, Check the STARTS SINCE SET counter for P0846.

NOTE: This counter only applies to the last DTC set.

Is the STARTS SINCE SET counter 2 or less?

Yes
1. Go To step 4).
No
1. Go To step 9).
4) PCM AND WIRING
Turn the ignition off to the lock position.

Remove the Starter Relay.

CAUTION: Removal of the Starter Relay is to prevent a Transmission, NO RESPONSE, condition and disable the starter.

Install the Transmission Simulator, Miller tool #8333 and the Electronic Transmission Adapter kit 8333-1A.

NOTE: Check connectors - Clean/repair as necessary.

Ignition on, engine not running.

With the Transmission Simulator, turn the Pressure Switch selector to 2/4.

With the scan tool, monitor the 2/4Pressure Switch state while pressing the Pressure Switch Test button on the Transmission Simulator.

Did the 2/4 Pressure Switch state change?

Yes
1. Go To step 8).
No
1. Go To step 5).
5) (T47) 2/4 PRESSURE SWITCH SENSE CIRCUIT OPEN

Fig 1: Checking 2/4 Pressure Switch Sense Circuit For Open
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off to the lock position.

Disconnect the PCM C4 harness connector.

Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.

NOTE: Check connectors - Clean/repair as necessary.

CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

Measure the resistance of the (T47) 2/4Pressure Switch Sense circuit from the appropriate terminal of special tool #8815 to the Transmission Solenoid/Pressure Switch Assembly harness connector.

Is the resistance above 5.0 ohms?

Yes
1. Repair the (T47) 2/4Pressure Switch Sense circuit for an open.
2. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1
No
1. Go To step 6).
6) (T47) 2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND

Fig 2: Checking 2/4 Pressure Switch Sense Circuit For Short To Ground
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off to the lock position.

Disconnect the PCM C4 harness connector.

Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance between ground and the (T47) 2/4 Pressure Switch Sense circuit.

Is the resistance below 5.0 ohms?

Yes
1. Repair the (T47) 2/4 Pressure Switch Sense circuit for a short to ground.
2. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1
No
1. Go To step 7).
7) (T47) 2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE

Fig 3: Checking 2/4 Pressure Switch Sense Circuit For Short To Voltage
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off to the lock position.

Disconnect the PCM C4 harness connector.

Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.

Remove the Transmission Control Relay.

NOTE: Check connectors - Clean/repair as necessary.

Connect a jumper wire between the (Internal) Fused B+ circuit and (T16) Transmission Control Relay Output circuit.

Ignition on, engine not running.

Measure the voltage of the (T47) 2/4 Pressure Switch Sense circuit.

Is the voltage above 0.5 volts?

Yes
1. Repair the (T47) 2/4 Pressure Switch Sense circuit for a short to voltage.
2. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1
No
1. Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the PCM per the Service Information. With the scan tool PERFORM QUICK LEARN, then program Pinion Factor in the Front Control Module. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/POWERTRAIN CONTROL MODULE - REMOVAL)
2. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1
8) 2/4 PRESSURE SWITCH
View repair.

Repair
1. Replace the Transmission Solenoid/Pressure Switch Assembly per the Service Information.
2. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1
9) INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set the DTC are not present at this time.

Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.

Wiggle the wires while checking for shorted and open circuits.

With the scan tool, check the EATX DTC EVENT DATA to help identify the conditions in which the DTC was set.

Were there any problems found?

Yes
1. Repair as necessary.
2. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1
No
1. Test Complete.