Diagnostic Test

1) DTC IS ACTIVE
Ignition on, engine not running.

With the scan tool, read DTCs in the Final Drive Control Module.

Is the status Active for this DTC?

Yes
1. Go to 2).
No
1. Go to 7).
2) (T315) SHIFT MOTOR CONTROL A CIRCUIT VOLTAGE

Fig 1: Checking Shift Motor Control A Circuit Voltage
Courtesy of CHRYSLER LLC

Turn the ignition off to the lock position

Disconnect the Transfer Case Motor harness connector.

Ignition on, engine not running.

Measure the voltage of the (T315) Shift Motor Control A circuit.

Is the voltage within 1 volt of battery voltage?

Yes
1. Go to 3).
No
1. Go to 4).
3) (T316) SHIFT MOTOR CONTROL B CIRCUIT VOLTAGE

Fig 2: Checking Shift Motor Control B Circuit Voltage
Courtesy of CHRYSLER LLC

Measure the voltage of the (T316) Shift Motor Control B circuit.

Is the voltage within 1 volt of battery voltage?

Yes
1. Go to 6).
No
1. Go to 5).
4) (T315) SHIFT MOTOR CONTROL A CIRCUIT OPEN

Fig 3: Checking Shift Motor Control A Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off to the lock position

Disconnect the Final Drive Control Module C1 harness connector.

Measure the resistance of the (T315) Shift Motor Control A circuit from the Transfer Case Motor harness connector to the Final Drive Control Module C1 harness connector.

Is the resistance above 5.0 ohms?

Yes
1. Repair the (T315) Shift Motor Control A circuit for an open.
2. Perform TRANSFER CASE VERIFICATION TEST .
No
1. Replace the Final Drive Control Module in accordance with the Service Information.
2. Perform TRANSFER CASE VERIFICATION TEST .
5) (T316) SHIFT MOTOR CONTROL B CIRCUIT OPEN

Fig 4: Checking Shift Motor Control B Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off to the lock position

Disconnect the Final Drive Control Module C1 harness connector.

Measure the resistance of the (T316) Shift Motor Control B circuit from the Transfer Case Motor harness connector to the Final Drive Control Module C1 harness connector.

Is the resistance above 5.0 ohms?

Yes
1. Repair the (T316) Shift Motor Control B circuit for an open.
2. Perform TRANSFER CASE VERIFICATION TEST .
No
1. Replace the Final Drive Control Module in accordance with the Service Information.
2. Perform TRANSFER CASE VERIFICATION TEST .
6) TRANSFER CASE MOTOR
Using the wiring diagram/schematic as a guide, inspect all wiring and connectors that pertain to this circuit.

Were any problems found?

Yes
1. Repair as necessary.
2. Perform TRANSFER CASE VERIFICATION TEST .
No
1. Replace the Transfer Case Motor in accordance with the Service Information.
2. Perform TRANSFER CASE VERIFICATION TEST .
7) INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.

While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.

Look for the data to change or for the DTC to reset during the wiggle test.

Were any problems found?

Yes
1. Repair as necessary.
2. Perform TRANSFER CASE VERIFICATION TEST .
No
1. Test complete.