Diagnostic Test

WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

1) DETERMINING IF RELATED DTCS ARE PRESENT
With the scan tool, check for other Transmission DTCs

Is the DTC P0841 present also?

Yes
1. Refer to appropriate Transmission DTC and perform the appropriate symptom.
No
1. Go To 2).
2) CHECK TO SEE IF DTC P1775 IS CURRENT
With the scan tool, view DTCs.

Is the status Active for this DTC or is the STARTS SINCE SET counter 2 or less?

Yes
1. Go To 3).
No
1. Go To 8).
3) PCM AND WIRING
Turn the ignition off to the lock position.

Remove the Ignition Switch Feed fuse from the TIPM.

CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear.

WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in personal injury or death.

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

Ignition on, engine not running.

With the Transmission Simulator, turn the Pressure Switch selector switch to L/R.

With the scan tool, monitor the L/R Pressure Switch State while pressing the Pressure Switch Test button.

Did the Pressure Switch state change from open to closed when the test button was pressed?

Yes
1. Repair internal transmission as necessary per the Service Information. Inspect the Solenoid Switch Valve per the Service Information and repair or replace as necessary. If no problems are found, replace the Transmission Solenoid/Pressure Switch Assembly.
2. Perform 42RLE TRANSMISSION VERIFICATION TEST .
No
1. Go To 4).
4) (T16) TRANSMISSION CONTROL OUTPUT CIRCUIT OPEN

Fig 1: Checking Transmission Control Output Circuit For An Open
Courtesy of CHRYSLER LLC

Turn the ignition off to the lock position.

Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.

Disconnect the PCM C4 harness connector.

With the scan tool under TIPM, actuate the Transmission.

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 tool #8815 to perform diagnosis.

Using a 12-volt test light connected to ground, check all (T16) Transmission Control Relay Output circuits in the appropriate terminals of Miller tool #8815.

NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly on all (T16) Transmission Control Output circuits?

Yes
1. Go To 5).
No
1. Repair the (T16) Transmission Control Relay Output circuit for an open.
2. Perform 42RLE TRANSMISSION VERIFICATION TEST .
5) (T50) L/R PRESSURE SWITCH SENSOR CIRCUIT OPEN

Fig 2: Checking L/R Pressure Switch SENSOR Circuit For Open
Courtesy of CHRYSLER LLC

With the scan tool under TIPM, stop the Transmission actuation.

Turn the ignition off to the lock position.

Measure the resistance of the (T50) L/R Pressure Switch SENSOR circuit between the Transmission Solenoid/Pressure Switch Assembly harness connector and the appropriate terminal of Miller tool #8815.

Is the resistance above 5.0 ohms?

Yes
1. Repair the (T50) L/R Pressure Switch SENSOR circuit for an open.
2. Perform 42RLE TRANSMISSION VERIFICATION TEST .
No
1. Go To 6).
6) (T50) L/R PRESSURE SWITCH SENSOR CIRCUIT SHORT TO GROUND

Fig 3: Checking L/R Pressure Switch SENSOR Circuit For Short To Ground
Courtesy of CHRYSLER LLC

Measure the resistance between ground and the (T50) L/R Pressure Switch SENSOR circuit.

Is the resistance below 5.0 ohms?

Yes
1. Repair the (T50) L/R Pressure Switch SENSOR circuit for a short to ground.
2. Perform 42RLE TRANSMISSION VERIFICATION TEST .
No
1. Go To 7).
7) (T50) L/R PRESSURE SWITCH SENSOR CIRCUIT SHORT TO VOLTAGE

Fig 4: Checking L/R Pressure Switch SENSOR Circuit For Short To Voltage
Courtesy of CHRYSLER LLC

Ignition on, engine not running.

With the scan tool under TIPM, actuate the Transmission.

Measure the voltage of the (T50) L/R Pressure Switch SENSOR circuit.

Is the voltage above 0.5 volts?

Yes
1. Repair the (T50) L/R Pressure Switch SENSOR circuit for a short to voltage.
2. Perform 42RLE TRANSMISSION VERIFICATION TEST .
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
2. Perform 42RLE TRANSMISSION VERIFICATION TEST .
8) INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.

Test drive and verify if the transmission is launching in 2nd gear and/or no TCC engagement.

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

Are there 2nd gear launches and/or no TCC engagement?

Yes
1. Disassemble and inspect the Valve Body per the Service Information and repair or replace as necessary. If no problems are found in the Valve Body, replace the Transmission Solenoid Pressure Switch Assembly.
2. Perform 42RLE TRANSMISSION VERIFICATION TEST .
No
1. Test Complete.