Part 2
Short-circuit to ground or open-circuit (Continued)
Checking for an open-circuit
Check cable between transmission connector terminal 25 and transmission control module (TCM) #A23 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 solenoid STH circuit for a short-circuit to ground
- Ignition off.
- Control module disconnected.
Connect an ohmmeter between #22 (#A22) on the breakout box and the transmission housing.
The ohmmeter should read infinite resistance.
OK - Checking the control signal cable for a short-circuit to supply voltage
Not OK - Checking solenoid STH circuit in the transmission for a short-circuit to ground
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Checking solenoid STH circuit in the transmission for a short-circuit to ground
- Ignition off.
- Remove the air cleaner (ACL) housing to access the transmission connector.
- Disconnect the transmission connector.
Connect an ohmmeter between transmission connector terminal 24 (transmission side) and the transmission housing.
The ohmmeter should read infinite resistance.
OK - Checking signal cable resistance to ground
Not OK - Checking solenoid STH for resistance to ground
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Checking solenoid STH for resistance to ground
- Ignition off.
- Open the control system according to Inspecting / replacing solenoids Inspecting / Replacing Solenoids.
- Disconnect solenoid STH.
Connect an ohmmeter between one of the pins in the solenoid connector and the transmission housing.
The ohmmeter should read infinite resistance.
OK - Checking for a short-circuit
Not OK - Replacing component
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Checking for a short-circuit
Check cables between solenoid STH and transmission connector terminals 24 and 25 for a short-circuit to ground 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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Replacing component
- Ignition off.
Replace transmission control system according to Control system, replacing Control System, Replacing.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Checking signal cable resistance to ground
- Ignition off.
- Control module disconnected.
- Transmission connector disconnected.
Connect an ohmmeter between #23 (#A23) on the breakout box and the transmission housing.
The ohmmeter should read infinite resistance.
OK - Checking for a short-circuit
Not OK - Checking for a short-circuit
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Checking for a short-circuit
Check cable between transmission connector terminal 25 and transmission control module (TCM) #A23 for a short-circuit to ground 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 a short-circuit
Check cable between transmission connector terminal 24 and transmission control module (TCM) #A22 for a short-circuit to ground 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 the control signal cable for a short-circuit to supply voltage
- Ignition off.
- Breakout box connected.
- Connect control module.
- Ignition on.
Connect a voltmeter between #22 (#A22) and #29 (#A29) on the breakout box.
The voltmeter should read 0-6 V.
OK - Checking signal cable for a short-circuit to supply voltage
Not OK - Checking for a short-circuit
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Checking for a short-circuit
Check cable between solenoid STH and transmission control module (TCM) #A22 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 the control module
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Checking signal cable for a short-circuit to supply voltage
- Ignition on.
Connect a voltmeter between #23 (#A23) and #29 (#A29) on the breakout box.
The voltmeter should read 0-2 V.
OK - Checking the control module
Not OK - Checking for a short-circuit
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Checking the control module
Hint: The transmission control module (TCM) can malfunction if there has been a short-circuit to supply voltage in the solenoid STH circuit. Check the transmission control module (TCM) as follows:
- Ignition off.
- Reconnect connectors, reinstall components.
- Ignition on.
- Go into scrolling value.
- Read off current in solenoid circuit.
- Depress accelerator pedal (AP) slowly.
The current should decrease as the accelerator pedal (AP) is depressed.
OK - Checking for contact resistance and oxidation
Not OK - Replacing component
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Checking for contact resistance and oxidation
- Ignition off.
The cause of the diagnostic trouble code (DTC) has been loose connections in the transmission control module (TCM) or transmission 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 a short-circuit
Check cable between solenoid STH and transmission control module (TCM) #A23 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 the control module
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Checking the control module
Hint: The transmission control module (TCM) can malfunction if there has been a short-circuit to supply voltage in the solenoid STH circuit. Check the transmission control module (TCM) as follows:
- Ignition off.
- Reconnect connectors, reinstall components.
- Ignition on.
- Go into scrolling value.
- Read off current in solenoid circuit.
- Depress accelerator pedal (AP) slowly.
The current should decrease as the accelerator pedal (AP) is depressed.
OK - Fault-tracing information
Not OK - Replacing component
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Fault-tracing information
Transmission control module (TCM) is OK.
Continue - FAULT FOUND
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Replacing component
- Ignition off.
Try a new control module according to Replacing transmission control module (TCM) Replacing Transmission Control Module (TCM).
Note! It is important that there is no short-circuit to supply voltage in the solenoid STH circuit. A short-circuit can damage the new transmission control module (TCM).
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 connectors, reinstall components etc.
- Ignition on.
- Select scrolling values.
- Read off current in solenoid circuit.
- Depress accelerator pedal (AP) slowly.
The current should decrease as the accelerator pedal (AP) is depressed.
OK - VERIFIED
Not OK - 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 solenoid STH
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Intermittent fault
Short-circuit to ground or open-circuit. 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 cable between solenoid STH and transmission control module (TCM) #A22 and #A23 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check cable between ground terminal 31/32 and transmission control module (TCM) #A29 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check ground terminal 31/32 for contact resistance and oxidation 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 solenoid STH
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