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62TE






P0765-UD SOLENOID CIRCUIT







Theory of Operation

Six solenoids are used to control the friction elements (clutches). The continuity of the solenoid circuits is periodically tested. Each solenoid is turned on or off depending on its current state. An inductive spike should be detected by the PCM during this test. If no spike is detected, the circuit is tested again to verify the failure. In addition to the periodic testing, the solenoid circuits are tested if a gear ratio or pressure switch error occurs. In this case, one failure will result in the appropriate DTC being set. The MIL will illuminate and the transmission goes into neutral, if the DTC is set above 35 km/h (22 mph), Limp-in mode when vehicle speed is below 35 km/h (22 mph).

- When Monitored:
Initially at ignition on, then every 10 seconds thereafter. The solenoids will also be tested immediately after a gear ratio error or pressure switch error is detected.

- Set Condition:
Three consecutive solenoid continuity test failures, or one failure if test is run in response to a gear ratio or pressure switch error.





Always perform the 62TE Pre-Diagnostic Troubleshooting procedure before proceeding.Pre-Diagnostic Troubleshooting Procedure

1. CHECK IF RELATED TCM DTCS ARE PRESENT
1. With the scan tool, read DTCs

Are there any TCM Power Input DTCs present also?

Yes

- Perform the appropriate diagnostic procedure(s).

No

- Go To 2

2. CHECK IF THE DTC IS CURRENT
1. With the scan tool, read DTCs.

Is the status Active or is the STARTS SINCE SET counter set at 0 for this DTC?

Yes

- Go To 3

No

- Go To 8

3. CHECK THE PCM AND WIRING USING THE TRANSMISSION SIMULATOR
1. Turn the ignition off to the lock position.
2. 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 possible serious or fatal injury.

3. Install the Transmission Simulator, Miller tool #8333A and the Electronic Transmission Adapter kit.
4. Ignition on, engine not running.
5. With the scan tool, actuate the UD Solenoid.
6. Monitor the UD Solenoid LED on the Transmission Simulator.

Did the UD Solenoid LED on the Transmission Simulator blink on and off during actuation?

Yes

- Go To 4

No

- Go To 5

4. CHECK WIRING USING THE TRANSMISSION SIMULATOR
1. With the scan tool, continue to actuate the UD Solenoid.
2. While monitoring the UD Solenoid LED on the Transmission Simulator, wiggle the related wiring harness and connectors.

Did the UD Solenoid LED on the Transmission Simulator continue to blink on and off during the wiggle test?

Yes

- Replace the Transmission Solenoid/TRS Assembly.
- Perform 62TE TRANSMISSION VERIFICATION TEST 62TE Transmission Verification Test

No

- Repair wiring or connectors as necessary.
- Perform 62TE TRANSMISSION VERIFICATION TEST 62TE Transmission Verification Test

5. CHECK THE (T59) UD SOLENOID CONTROL CIRCUIT FOR AN OPEN




1. Turn the ignition off to the lock position.
2. Disconnect the PCM C4 harness connector.
3. Disconnect the Transmission Solenoid/TRS Assembly harness connector.

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 PCM Pinout Box 8815 to perform diagnosis.

4. Measure the resistance of the (T59) UD Solenoid Control circuit between the appropriate terminal of Miller special tool #8815 and the Solenoid/TRS Assembly harness connector.

Is the resistance above 5.0 ohms?

Yes

- Repair the (T59) UD Solenoid Control circuit for an open.
- Perform 62TE TRANSMISSION VERIFICATION TEST 62TE Transmission Verification Test

No

- Go To 6

6. CHECK THE (T59) UD SOLENOID CONTROL CIRCUIT FOR A SHORT TO GROUND




1. Measure the resistance between ground and the (T59) UD Solenoid Control circuit.

Is the resistance below 5.0 ohms?

Yes

- Repair the (T59) UD Solenoid Control circuit for a short to ground.
- Perform 62TE TRANSMISSION VERIFICATION TEST 62TE Transmission Verification Test

No

- Go To 7

7. CHECK THE (T59) UD SOLENOID CONTROL CIRCUIT FOR A SHORT TO VOLTAGE




1. Ignition on, engine not running.
2. With the scan tool in the TIPM, actuate the TCM output.
3. Measure the voltage of the (T59) UD Solenoid Control circuit.

Is the voltage above 0.5 volts?

Yes

- Repair the (T59) UD Solenoid Control circuit for a short to voltage.
- Perform 62TE TRANSMISSION VERIFICATION TEST 62TE Transmission Verification Test

No

- 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 and program the PCM. With the scan tool, perform QUICK LEARN Quick Learn Procedure.
- Perform 62TE TRANSMISSION VERIFICATION TEST 62TE Transmission Verification Test

8. INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle the wires while checking for shorted and open circuits.
4. With the scan tool, check the DTC EVENT DATA to help identify the conditions in which the DTC was set.

Were there any problems found?

Yes

- Repair as necessary.
- Perform 62TE TRANSMISSION VERIFICATION TEST 62TE Transmission Verification Test

No

- Test Complete.

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