Fault-Tracing
Fault-tracing TCM-0042
Checking the oil temperature
- Ignition on
- Read the oil temperature for the transmission control module (TCM).
Check that oil temperature is within the permitted range. Compare with the temperature of the automatic transmission.
Note! The transmission temperature sensor is located inside the control system and may be affected by the heat given off by the solenoids.
Oil Temperature Sensor:
Is the temperature OK?
Yes - Fault-tracing information
No - Checking the wiring and component
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Fault-tracing information
The probable cause of the diagnostic trouble code (DTC) was the transmission being subjected to high loads and high temperatures. It is therefore important to change transmission fluid and to check the function of the transmission. Check the transmission oil cooler and corresponding hoses. Check for blockage and damage.
Hint: If no fault is found check the oil temperature sensor. See: Checking internal components of the transmission Checking Internal Components of the Transmission
Other information
- Transmission fluid, replacing Transmission Fluid, Replacing
Continue - Resetting the oil 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 - Test driving
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Test driving
Test drive the vehicle following: Test drive schedule, description Test Drive Schedule, Description
Has the transmission displayed any mechanical faults?
Yes - Fault-tracing information
No - Fault Found
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Fault-tracing information
Cancel the fault tracing in progress. Add the mechanical symptoms to the symptom list and fault trace the symptoms.
Continue - DONE
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Checking the wiring and component
- Open the gearbox control system
Check the signal cable between the oil temperature sensor in the transmission and transmission control module (TCM) terminal #B8 (#B8). Check for a short circuit to ground.
Remedy as necessary
Other information:
- Connecting the breakout box Connecting Breakout Box, Transmission Control Module (TCM)
- Signal description Signal Description. Transmission Control Module (TCM)
- Cover control system, replacing Cover Control System, Replacing
- Checking wiring and terminals Checking Wiring And Terminals
Oil Temperature Sensor:
Continue - Verification
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Verification
Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the connectors, components etc.
- Ignition on
- Start the engine and allow it to idle.
- Read the oil temperature for the transmission control module (TCM).
Check that oil temperature is within the permitted range. Compare with the external temperature of the transmission.
Note! The transmission temperature sensor is located inside the control system and may be affected by the heat given off by the solenoids.
Oil Temperature Sensor:
Is the temperature OK?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - Fault Found
VERIFICATION FAILED - Fault-tracing information
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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 the oil temperature
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