Fault-Tracing
Fault tracing
Checking oil quality and oil level in transmission
Note! The transmission oil's quality and level are extremely important for the function of the transmission. Therefore it is important that these are correct. In addition, the oil level is dependent on oil temperature.
- Ignition on
- Read off the oil's temperature.
Check the transmission's oil level. If it is low, check the transmission for leaks and then top off the oil.
Check the oil's quality.
If the oil smells burnt, change transmission oil.
Other information
- Oil level, checking Checking Oil Level
- Oil grade, checking Oil Grade, Checking
- Transmission fluid, replacing Transmission Fluid, Replacing
Select an alternative below
1. No defect found.
2. Transmission oil changed, level low or quality poor.
Select alternative according to above.
1 - Checking the wiring and component
2 - Resetting the oil quality counter
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Checking the wiring and component
- Ignition off
Check connector B (22-pin) for the transmission control module (TCM). Check for damaged or pressed in pins. Check for contact resistance and oxidation.
Check the cables between the transmission's and the solenoid's connector for open circuit
Hint: Check linear pressure solenoid SLU as described in: Checking internal components of the transmission Checking Internal Components of the Transmission
If no defects were found on connectors or cables, replace the transmission.
Remedy as necessary.
Other information
- Gearbox, removing Transmission, Removing
- Installing the gearbox Transmission, Installation
- Control system, replacing Control System, Replacing
- Cable harness, control system, gearbox, replacing Service and Repair
- To access connector B, see: Transmission control module (TCM), replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals
Was a fault detected?
Yes - Resetting the oil quality counter
No - Replacing the transmission
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Replacing the transmission
Previous tests indicate an internal malfunction in the transmission.
Other information
- Gearbox, removing Transmission, Removing
- Installing the gearbox Transmission, Installation
Continue - Resetting adaptation and the fluid quality counter
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Resetting the oil quality counter
Resetting the counter for Transmission oil, change
Resetting the counter for Transmission oil, change
Hint: The transmission control module (TCM) has a counter for the oil's quality that counts up when the transmission is exposed to very heavy loads or high ambient temperature. If the counter is not reset when draining/changing oil, there is a risk that a diagnostic trouble code may be generated under incorrect conditions. That is why it is important that the counter for Transmission oil, change is reset.
Note! This only applies when the transmission oil is changed and when the oil is changed during repairs to the transmission's temperature sensor.
- Ignition on
Activate reset of the counter by clicking on the symbol for VCT2000.
Continue - DONE
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DONE - Verification
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Resetting adaptation and the fluid quality counter
Resetting adaptation
Resetting adaptation and counter for "Transmission oil, changing"
Hint: The transmission has torque-controlled, adaptive pressure control. The pressure control means that the transmission itself controls the pressure during each shift sequence in order to avoid harsh shifting. Each shift is assessed by the transmission control module (TCM) and is stored in the internal memory, which results in compensation for wear in the transmission and clutch. In order for the transmission to function correctly after repair, it is important to reset the adaptation in the memory. Since the oil is changed during the repair, the counter for "Transmission oil, change" shall also be reset. If the counter is not reset when draining/changing oil, there is a risk that a diagnostic trouble code may be generated under incorrect conditions.
Note! This applies only if the transmission or one of the components in the transmission have been replaced.
- Ignition on
Activate reset of the adaptation and the counter by clicking on the symbol for VCT2000.
Continue - DONE
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DONE - Verification
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Verification
Verification
Verification
Note! When the transmission's control module has been removed and reinstalled, it is important that the gear position sensor is calibrated. Select vehicle communication and calibrate gear position sensor.
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the components, reconnect the connectors etc.
Test drive the vehicle following: Test drive schedule, description Test Drive Schedule, Description
Check that the transmission does not display any obvious function faults.
Note! When test driving, the oil temperature must be above 20 °C.
Is the function OK?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - 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 - FAULT-TRACING FAILED
No - Attempt New Test
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FAULT-TRACING FAILED - FAULT-TRACING FAILED
Attempt New Test - Checking oil quality and oil level in transmission
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