C1405

C1405- TRANSFER CASE RANGE POSITION SENSOR CIRCUIT HIGH





For a complete wiring diagram, refer to the Wiring Information..

- When Monitored:
With the ignition on. Battery voltage between 9.0 and 16.0 volts

- Set Condition:
The TIPM detects 5.0 volts on the Transfer Case Range Position Sensor Signal circuit for 2.0 seconds when voltage should not be present.





1. T-CASE POSITION SENSOR VOLTAGE ABOVE 4.8 VOLTS
1. Ignition on, engine not running.
2. With the scan tool under TIPM, read the T-Case Position sensor voltage.

Is the voltage above 4.8 volts?

Yes

- Go To 2

No

- Go To 7

2. (T313) MODE SENSOR SIGNAL CIRCUIT VOLTAGE




1. Turn the ignition off to the lock position.
2. Disconnect the Transfer Case Motor harness connector.
3. Ignition on, engine not running.
4. Measure the voltage of the (T313) Mode Sensor Signal circuit and the (Z904) Ground at the Transfer Case Motor harness connector.

Is the voltage between 4.8 and 5.2 volts?

Yes

- Replace the Transfer Case (4WD) Switch.
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

No

- Go To 3

3. (T313) MODE SENSOR SIGNAL CIRCUIT OPEN




1. Turn the ignition off to the lock position.
2. Disconnect the TIPM C1 harness connector.
3. Measure the resistance of the (T313) Mode Sensor Signal circuit between the Transfer Case (4WD) Switch harness connector and the TIPM C1 harness connector.

Is the resistance above 5.0 ohms?

Yes

- Repair the (T313) Mode Sensor Signal circuit for an open.
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

No

- Go To 4

4. (Y13) SENSOR GROUND CIRCUIT OPEN




1. Disconnect the Instrument Cluster C2 harness connector.
2. Measure the resistance of the (Y13) Sensor Ground circuit between the Transfer Case (4WD) Switch harness connector and the Instrument Cluster C2 harness connector.

Is the resistance above 5.0 ohms?

Yes

- Repair the (Y13) Sensor Ground circuit for an open.
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

No

- Go To 5

5. (T313) MODE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE




1. Ignition on, engine not running.
2. Measure the voltage of the (T313) Mode Sensor Signal circuit at the Transfer Case Motor harness connector.

Is the voltage above 0.2 volts?

Yes

- Repair the (T313) Mode Sensor Signal circuit for a short to voltage.
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

No

- Go To 6

6. (Y13) SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition off to the lock position.
2. Disconnect the Transfer Case (4WD) Switch harness connector.
3. Ignition on, engine not running.
4. Measure the voltage of the (Y13) Sensor Ground circuit at the Transfer Case (4WD) Switch harness connector.

Is the voltage above 0.2 volts?

Yes

- Repair the (Y13) Sensor Ground circuit for a short to voltage.
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

No

- Replace the Totally Integrated Power Module (TIPM).
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

7. INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
3. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
4. Look for the data to change or for the DTC to reset during the wiggle test.

Were any problems found?

Yes

- Repair as necessary.
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

No

- Test complete.