The number(s) below refer to the step number(s) on the diagnostic table.
This step determines if the transfer case shift control module has electronic control of the switch indicator lamps.
This step provides a ground to the indicator lamp circuits in order to eliminate the transfer case shift control module.
This step checks for B+ in the indicator lamp circuits.
Step | Action | Value(s) | Yes | No |
---|---|---|---|---|
1 | Was the Transfer Case Diagnostic System Check performed? | -- | Go to Step 2 | |
Do the switch indicator lamps turn On? | -- | Go to Step 7 | Go to Step 3 | |
3 |
Do each of the switch indicator lamp states change from OFF to ON as Indicator Lamps are commanded ON? | -- | Go to Step 7 | Go to Step 4 |
Do each of the lamps illuminate when its circuit is grounded? | -- | Go to Step 7 | Go to Step 5 | |
Connect a J 39200 Digital Multimeter DMM between the suspect circuit and ground in order to measure voltage. Is the voltage within the specified value? | 9-14 V | Go to Step 8 | Go to Step 6 | |
6 | Inspect the suspect circuit(s) for open. Refer to Wiring Repairs in Wiring Systems. Were the suspected circuit(s) open? | -- | Go to Step 9 | Go to Step 8 |
7 | Replace the transfer case shift control module. Refer to Transfer Case Shift Control Module Replacement . Is the action complete? | -- | Go to Step 10 | -- |
8 | Replace the range/mode switch. Refer to Transfer Case Shift Control Switch Replacement . Is the action complete? | -- | Go to Step 10 | -- |
9 | Repair an open in the suspect circuit(s). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 10 | -- |
10 |
Have all the ATC components been reconnected and properly mounted? | -- | Go to Step 11 | -- |
11 | Clear all ATC DTCs. Have all the ATC DTCs been cleared? | -- | -- |