Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
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The front axle switch should be in the Locked position while the vehicle is in the 4WD mode. This step determines if the front axle switch is Locked during 4WD mode.
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This step determines if the front axle switch is Locked during AWD mode.
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This step determines if there is a mechanical failure or a faulty transfer case shift control module.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Transfer Case Diagnostic System Check performed? | -- | Go to Step 2 | |
Is the Front Axle Switch Locked? | Go to Step 3 | |||
Does the state of the Front Axle Switch continue to display Locked? | -- | Go to Step 4 | Go to Step 6 | |
Are the rpm values approximately equal at the same speeds? | -- | Go to Step 6 | Go to Step 5 | |
5 | Inspect front axle and transfer case for mechanical failure. Repair/replace as needed. Are the repairs complete? | -- | Go to Step 7 | -- |
6 | Replace transfer case shift control module. Refer to Transfer Case Shift Control Module Replacement . Is the action complete? | -- | Go to Step 7 | -- |
7 | Reconnect all ATC system components, make sure all the components are properly mounted. Have all the ATC components been reconnected and properly mounted? | -- | Go to Step 8 | -- |
8 | Clear all the ATC DTCs. Are all the ATC DTCs cleared? | -- | -- |
