Signal Too High
Signal too high
Checking oil temperature
- Ignition on.
- Go into scrolling values.
- 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 - Intermittent fault
No - Checking ground lead
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Checking ground lead
- Ignition off.
- Remove the air cleaner (ACL) housing to access the transmission connector.
- Disconnect the transmission connector.
Connect an ohmmeter between the transmission connector terminal 13 (transmission control module (TCM) side) and ground.
The ohmmeter should read approx. 0 ohms.
OK - Checking signal cable
Not OK - Checking the transmission control module (TCM) connector
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Checking the transmission control module (TCM) connector
- Ignition off.
- Disconnect transmission connector.
- Check transmission control module (TCM) connector for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Control module connected.
Connect an ohmmeter between the transmission connector terminal 13 (transmission control module (TCM) side) and ground.
The ohmmeter should read approx. 0 ohms.
OK - Fault-tracing information
Not OK - Checking for an open-circuit
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Fault-tracing information
The cause of the diagnostic trouble code (DTC) has been loose connections in the transmission control module (TCM) connector.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking for an open-circuit
Check cable between transmission connector terminal 13 and transmission control module (TCM) #A15 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking signal cable
- Ignition off.
- Transmission connector disconnected.
- Ignition on.
Note! Diagnostic trouble codes (DTCs) for solenoids and the gear-shift position sensor may be stored if the transmission connector is disconnected and the ignition switched on.
Connect a voltmeter between the transmission connector terminal 12 (transmission control module (TCM) side) and ground.
The voltmeter should read approx. 5 V.
OK - Checking oil temperature sensor resistance
Low - Checking the transmission control module (TCM) connector
High - Checking for a short-circuit to supply voltage
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Checking for a short-circuit to supply voltage
Check cable between transmission connector terminal 12 and control module #A14 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Checking oil temperature sensor
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Checking the transmission control module (TCM) connector
- Ignition off.
- Disconnect transmission connector.
- Check transmission control module (TCM) connector for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Control module connected.
- Ignition on.
Connect a voltmeter between transmission connector terminal 12 (transmission control module (TCM) side) and ground.
The voltmeter should read approx. 5 V.
OK - Fault-tracing information
Not OK - Checking for an open-circuit
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Checking for an open-circuit
Check cable between transmission connector terminal 12 and transmission control module (TCM) #A14 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking oil temperature sensor resistance
- Ignition off.
- transmission connector disconnected.
Connect an ohmmeter between the transmission connector terminals 12 and 13 (transmission side).
Compare the temperature below with the transmission temperature at the oil temperature sensor.
The ohmmeter should read 765-1035 ohms at +20°C, see table.
OK - Remedy contact resistance and oxidation
Not OK - Checking for an open-circuit
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Remedy contact resistance and oxidation
The cause of the diagnostic trouble code (DTC) has been loose connections in the transmission and transmission control module (TCM) connectors. Check connector for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking for an open-circuit
Check cables between the oil temperature sensor and transmission connector terminals 12 and 13 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Are cables OK?
Yes - Replacing component
No - Verification
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Checking oil temperature sensor
Hint: The oil temperature sensor can malfunction due to a short-circuit to supply voltage in the signal cable. Check signal cable as follows:
- Ignition off.
- Transmission connector disconnected.
- Connect an ohmmeter between the transmission connector terminals 12 and 13 (transmission side).
The ohmmeter should read 765-1035 ohms at +20°C, see table.
OK - Verification
Not OK - Replacing component
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Replacing component
Try a new oil temperature sensor according to Replacing the oil temperature sensor Replacing the Oil Temperature Sensor.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Verification
Verification
Hint: After repairs have been completed they must be verified as follows to ensure that the fault has been eliminated:
- Ignition off.
- Reconnect the connectors, reinstall components etc.
- Go into scrolling values.
- Ignition on.
- Read off oil temperature.
Check that the transmission oil temperature is within bounds. Compare with the transmission temperature.
Is the oil temperature within bounds?
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 - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking oil temperature
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Intermittent fault
Signal too high. Intermittent fault
Intermittent fault
- Ignition off.
- Check transmission and transmission control module (TCM) connectors for loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check the cable between the oil temperature sensor and transmission control module (TCM) #A14 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check the cable between the oil temperature sensor and transmission control module (TCM) #A15 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Select "Continue" when the fault has been repaired.
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
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