Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

1) DETERMINING IF RELATED DTC'S ARE PRESENT
With the scan tool, check for other Transmission DTC's

Is the DTC P0841 present also?

Yes
1. Refer to DIAGNOSTIC CODE INDEX and perform the appropriate diagnostic procedure(s).
No
1. Go To step 2).
2) CHECK THE DTC EVENT DATA FOR TRS CODE TR2
With the scan tool, check the DTC EVENT DATA for P1776.

Does the DTC EVENT DATA show a TRS Code of TR2?

Yes
1. This indicates the shift lever and the manual control valve were in an invalid position between Neutral and OD. Check the shifter cable for: proper adjustment, binding, friction, improper routing, or the shifter was moved in transit. Repair as necessary.
2. Perform 40/41 TE TRANSMISSION VERIFICATION TEST - VER 1 .
No
1. Go To step 3).
3) CHECK TO SEE IF DTC P1776 IS CURRENT
With the scan tool, check the STARTS SINCE SET counter for P1776.

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

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

Yes
1. Go To step 4).
No
1. Go To step 9).
4) CHECK THE PCM AND WIRING USING THE TRANSMISSION SIMULATOR
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 8333-1A.

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. Go To step 5).
No
1. Go To step 6).
5) CHECK THE SOLENOID SWITCH VALVE FOR STICKING
Remove the transmission oil pan and Valve body and inspect the Solenoid Switch Valve for sticking in its bore, repair or replace as necessary.

NOTE: This DTC may be caused by debris lodged in the Transmission Solenoid Switch Valve bore. If debris is found, clean the valve body and reassemble the transmission per the Service Information.

With the scan tool, record the DTC EVENT DATA for P1776 and erase DTCs.

Reassemble the transmission and test drive the vehicle. Try to duplicate the original set conditions using the DTC EVENT DATA recorded earlier.

With the scan tool, check Transmission DTCs.

Did the DTC P1776 reset?

Yes
1. Replace the Transmission Solenoid Assembly per the Service Information.
2. Perform 40/41 TE TRANSMISSION VERIFICATION TEST - VER 1 .
No
1. Test Complete
2. Perform 40/41 TE TRANSMISSION VERIFICATION TEST - VER 1 .
6) CHECK THE (T50) L/R PRESSURE SWITCH SENSE CIRCUIT FOR AN OPEN

Fig 1: Checking L/R Pressure Switch Sense Circuit
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 tool #8815 to perform diagnosis.

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

Is the resistance above 5.0 ohms?

Yes
1. Repair the (T50) L/R Pressure Switch Sense circuit for an open.
2. Perform 40/41 TE TRANSMISSION VERIFICATION TEST - VER 1 .
No
1. Go To step 7).
7) CHECK THE (T50) L/R PRESSURE SWITCH SENSE CIRCUIT FOR A SHORT TO GROUND

Fig 2: Checking L/R Pressure Switch Sense Circuit
Courtesy of DAIMLERCHRYSLER CORP.

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

Is the resistance below 5.0 ohms?

Yes
1. Repair the (T50) L/R Pressure Switch Sense circuit for a short to ground.
2. Perform 40/41 TE TRANSMISSION VERIFICATION TEST - VER 1 .
No
1. Go To step 8).
8) CHECK THE (T50) L/R PRESSURE SWITCH SENSE CIRCUIT FOR A SHORT TO VOLTAGE

Fig 3: Checking L/R Pressure Switch Sense Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Ignition on, engine not running.

With the scan tool in the TIPM, actuate the TCM output.

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

Is the voltage above 0.5 volts?

Yes
1. Repair the (T50) L/R Pressure Switch Sense circuit for a short to voltage.
2. Perform 40/41 TE 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. Check for Service Information Tune-ups or Service Bulletins for any possible causes that may apply. If no problems are found, replace the PCM per the Service Information. With the scan tool, perform QUICK LEARN.
2. Perform 40/41 TE TRANSMISSION VERIFICATION TEST - VER 1 .
9) INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.

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

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

Check for any Service Information Tune-ups or Service Bulletins for possible causes that may apply.

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

Yes
1. Disassemble and inspect the Valve Body per the Service Information Inspect the Solenoid Switch Valve for sticking in its bore and repair or replace as necessary.
2. Perform 40/41 TE TRANSMISSION VERIFICATION TEST - VER 1 .
No
1. Test Complete.