Stuck
Stuck
Checking the function of the transmission
- Start the engine
- Ensure that the car is fully braked
- Move the gear selector to position D
- Press the "Winter" mode button.
Hint: The "Winter" mode activates second gear.
Check that the engine speed (RPM) drops considerably when "Winter" mode is engaged.
Hint: If the engine speed (RPM) drops considerably, the lock-up function is engaged.
Did the engine speed (RPM) drop dramatically?
Yes - Replacing the control system
No - Checking diagnostic trouble codes (DTCs)
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Checking diagnostic trouble codes (DTCs)
Checking diagnostic trouble codes (DTCs)
Checking diagnostic trouble codes (DTCs)
- Ignition on
- Read off diagnostic trouble codes (DTCs).
If any other diagnostic trouble codes (DTCs) than TCM-0050 are stored, these must be fault-traced and remedied after this fault-tracing is completed.
Continue - Erasing diagnostic trouble codes (DTCs)
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Erasing diagnostic trouble codes (DTCs)
- Ignition off
- Wait for two minutes to allow time for the diagnostic trouble codes (DTCs) to be stored in the control module memory
- Ignition on
- Erase diagnostic trouble codes (DTCs).
Continue - Check the diagnostics number
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Check the diagnostics number
Checking the software
Checking the software
Note! To carry out fault-tracing, the transmission control module (TCM) must be programmed with specific software.
- Ignition on
- Read off the control module diagnostic number.
Check the read off diagnostic number against the diagnostic numbers given in the center table.
If the diagnostic number is included in the table, the control module must be programmed with the latest software.
See the technical journal for information about the most recent software.
Continue - Test driving
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Test driving
Note! Test drive the car according to the driving schedule below to check whether the fault is still active. The test drive is compiled in order to create the conditions in which the diagnostic trouble code (DTC) will be stored again if the fault is active. The TEST MODE function can be used to provoke any diagnostic trouble codes (DTC). The function reduces the conditions for how quickly diagnostic trouble codes (DTCs) are stored in the control module and the test drive becomes easier.
- Start the engine
- Activate TEST MODE.
Note! Do not switch off the engine!
- Disconnect the VIDA station. Test drive the car as described below.
Warning! Please observe traffic regulations.
Note! Before test driving, the transmission fluid should be at operating temperature, approximately 80-90°C.
Shift the gear selector to position D. Carefully accelerate to 50-65 km/h. Maintain the same speed for more than 20 seconds.
Criteria for diagnostic trouble code (DTC):
- The transmission fluid temperature must exceed 30°C
- The engine must be running for at least 20 seconds
- Gear selector in position D, 3 or 2 (4T65EV).
Gear selector in Geartronic position and gears 4, 3 or 2 (4T65EV-GT)
- Speed 50-65 km/h for at least 5 seconds.
Hint: The car must be driven at an engine speed where the lock-up function is not normally activated.
- At least 5 seconds since the last gear shift
- Positive engine torque (no engine braking).
Continue - Checking diagnostic trouble codes (DTCs)
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Checking diagnostic trouble codes (DTCs)
- Ignition on
- Read off diagnostic trouble codes (DTCs).
If any other diagnostic trouble codes (DTCs) than TCM-0050 are stored, these must be fault-traced and remedied after this fault-tracing is completed.
Was diagnostic trouble code (DTC) TCM-0050 stored?
Yes - DTC
No - NO DTC
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DTC - Checking solenoid SL
NO DTC - Fault-tracing information
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Checking solenoid SL
- Ignition off
- Connect the breakout box to the control module connector (transmission side).
Check solenoid SL by measuring the resistance between terminals #A51 (#A51) and #A53 (#A53).
When the transmission is cold (20°C), the resistance must be 10-11 ohms. When the transmission is at operating temperature (150°C), the resistance must not exceed 16 ohms.
Other information:
- To connect the breakout box, see Connecting the breakout box, 4T65EV-GT Connecting the Breakout Box
- For information about signals, see Signal specification, 4T65EV-GT Signal Specification.
Was the resistance OK?
Yes - Checking the transmission fluid
No - Checking the wiring
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Checking the transmission fluid
- Ignition off.
Remove the transmission oil trough according to Gearbox fluid, replacing Removal and Replacement. Check the transmission oil and filter. Check forabnormalamounts of particles in the oil.
Large amounts of particles in the oil trough and filter indicate that there is an internal fault in the transmission and that the transmission must be replaced. If there are small amounts of particles in the oil trough and filter, the transmission control system should be replaced.
Select an alternative
1. Large amounts particles in the oil trough and filter
2. Small amounts particles in the oil trough and filter.
1 - Replacing the transmission
2 - Replacing the control system
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Checking the wiring
- Ignition off
- Control module disconnected
- Connect the breakout box to the control module connector (transmission side)
- Disconnect the transmission connector
- Adapter951 1505 Adapter 20 pin 951 1505 Adapter 20 Pin and breakout box951 1428 Breakout box 951 1428 Breakout Box connected to the transmission connector (control module side).
Check the wiring between control module terminal #A51 (#A51) and transmission connector terminal #T (#A17). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Check the wiring between control module terminal #A53 (#A53) and transmission connector terminal #E (#A5). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information:
- To connect the breakout box, see Connecting the breakout box, 4T65EV-GT Connecting the Breakout Box
- To connect the breakout box to the transmission connector, see Connecting the breakout box, GM automatic transmissions, 4T65EV-GT Connecting the Breakout Box, GM Automatic Transmissions
- For information about signals, see Signal specification, 4T65EV-GT Signal Specification
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Was a fault detected?
Yes - Verification
No - Checking the wiring and component
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Checking the wiring and component
- Ignition off
- Open the transmission control system
- Connect adapter951 1505 Adapter 20 pin 951 1505 Adapter 20 Pin and breakout box951 1428 Breakout box 951 1428 Breakout Box to the transmission connector (transmission side).
Check the cable between transmission connector terminal #T (#A17) and solenoid SL terminal #A. Check the cable between transmission connector terminal #E (#A5) and solenoid SL terminal #B. Check these cables for an open-circuit.
Hint: Check solenoid SL by measuring the resistance between solenoid SL terminals #A and #B. When the transmission is cold (approximately 20°C), the resistance must be 10-11 ohms.
Remedy as necessary.
Other information:
- To open the transmission control system, see Side cover transmission, replacing Side Cover Transmission, Replacing
- To connect the breakout box to the transmission connector, see Connecting the breakout box, GM automatic transmissions, 4T65EV-GT Connecting the Breakout Box, GM Automatic Transmissions
- To replace solenoid SL, see Solenoid lock-up function, replacing
- To replace the cable harness, see Wiring harness / oil temperature sensor, replacing Removal and Replacement
- For information about signals, see Signal specification, 4T65EV-GT Signal Specification
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Select "Continue".
Continue - Resetting the adaptation
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Replacing the transmission
Fault-tracing indicates a fault in the transmission. Replace the transmission.
Other information:
- To remove the transmission, see Gearbox, removing Gearbox, Removing
- To install the transmission, see Gearbox, installing Gearbox, Installing.
Select "Continue" when the fault has been remedied.
Continue - Resetting the adaptation
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Fault-tracing information
The fault-tracing indicates that the control module has previously detected a fault but that the fault is no longer active.
Continue - No Fault Found
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Resetting the adaptation
Resetting the adaptation
Resetting adaptation and the counter for "Transmission oil change"
Hint: The transmission has torque controlled adaptive pressure control. Pressure control means that the transmission regulates the pressure itself during each gear shift. This avoids harsh gear shifting. Each gear shift is evaluated by the control module and stored in the memory. This allows for compensation for wear and tear in the transmission and clutch. It is important that the adaptation in the memory is reset after the transmission has been repaired. This is to ensure normal operation. The oil is replaced during repair; the "Transmission oil change" counter must be reset. If the counter is not reset when the fluid is drained and replaced, there is a risk that a diagnostic trouble code (DTC) will be stored in incorrect circumstances.
Note! This applies only if the transmission or one of the components in the transmission have been replaced.
- Ignition on.
Click on the VCT2000 symbol to reset the adaptation and counter.
Continue - Verification
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Resetting the adaptation
Resetting the adaptation, AW55-50/51SN, AW50/51 AWD, 4T65EV-GT
DONE - FAULT FOUND
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Verification
Checking diagnostic trouble codes (DTCs)
DTC - Fault-tracing information
NO DTC - FAULT FOUND
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit Fault-Tracing
No - Attempt New Test
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Attempt New Test - Checking the function of the transmission
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Replacing the control system
Fault-tracing indicates a fault in the transmission control system. Replace the control system.
Other information:
- To replace the control system, see Control system / valve housing, replacing .
Select "Continue" when the fault has been remedied.
Continue - Resetting the adaptation
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