Signal Too Low
Signal too low
Checking oil temperature sensor function
- Ignition on.
- Read off oil temperature.
Check that the temperature is reasonable.
Compare with the transmission temperature.
Was the transmission temperature reasonable?
Yes - Intermittent fault
No - Checking wiring and components
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Checking wiring and components
Check cable between control module #A37 and transmission connector (control module side) #12 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Hint: With the ignition off and the transmission connector disconnected the resistance between #12 and #13 should be 765-1035 ohms at 20°C (68°F). At other transmission temperatures, see table Component resistance values Component Resistance Values.
With the control module and transmission connectors disconnected the resistance between control module #A37 and #A55 should be infinite.
Remedy as necessary.
Other information:
- To connect the breakout box, see Connecting breakout box, Transmission control module (TCM) Connecting Breakout Box, Transmission Control Module (TCM).
- To disconnect transmission connector, see Inspecting/cable harness to solenoids .
- To check/replace oil temperature sensor, see Replacing the oil temperature sensor .
- For information about signals, see Signal specification, Transmission control module (TCM) Signal Description AW50-42.
Was a fault detected?
Yes - Resetting adaptation and oil quality counter
No - No Fault Found
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Resetting adaptation and oil quality counter
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 - DONE
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DONE - Verification
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Verification
Verification
Hint: After carrying out the repair check that the fault has been remedied.
- Ignition off.
- Reinstall connectors, components etc.
- Ignition on.
- Read off oil temperature.
Check that the transmission oil temperature is within its permitted range. Compare with the transmission temperature.
Is the oil temperature within its permitted range?
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 - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking oil temperature sensor function
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Intermittent fault
Check cable between control module #A37 and transmission connector (control module side) #12 for an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Remedy as necessary.
Other information:
- To connect the breakout box, see Connecting breakout box, Transmission control module (TCM) Connecting Breakout Box, Transmission Control Module (TCM).
- To disconnect transmission connector, see Inspecting/cable harness to solenoids .
- For information about signals, see Signal specification, Transmission control module (TCM) Signal Description AW50-42.
Continue - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - FAULT FOUND
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Attempt New Test - Checking oil temperature sensor function
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