C1405

C1405- TRANSFER CASE RANGE POSITION SENSOR CIRCUIT HIGH





For a complete wiring diagram refer to Diagrams/Electrical. Electrical Diagrams

- 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.







Diagnostic Test


1. T-CASE POSITION SENSOR VOLTAGE ABOVE 4.8 VOLTS

Ignition on, engine not running.

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. (T103) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE





Turn the ignition off to the lock position.

Disconnect the Shift Motor/Mode sensor harness connector.

Ignition on, engine not running.

Measure the voltage of the (T103) 5 Volt Supply circuit.

Is the voltage above 5.5 volts?

Yes

- Repair the (T103) 5 Volt Supply circuit for a short to voltage.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests

No

- Go To 3



3. (D201) MODE SENSOR A CIRCUIT SHORTED TO VOLTAGE





Measure the voltage of the (D201) Mode Sensor A circuit.

Is the voltage above 5.5 volts?

Yes

- Repair the (D201) Mode Sensor A circuit for a short to voltage.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests

No

- Go To 4



4. SHIFT MOTOR/MODE SENSOR ASSEMBLY





Turn the ignition off to the lock position.

Connect a jumper wire between the (G180) TIPM sensor return circuit and the (D201) Mode sensor A circuit at the Shift Motor/Mode sensor harness connector.

Ignition on, engine not running.

With the scan tool under TIPM, read the T-Case Position sensor voltage.


NOTE: Remove the jumper wire before continuing.

Is the voltage below 0.2 volts?

Yes

- Replace the Shift Motor/Mode sensor assembly.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests

No

- Go To 5



5. (D201) MODE SENSOR A CIRCUIT OPEN





Turn the ignition off to the lock position.

Disconnect the TIPM C4 harness connector.

Measure the resistance of the (D201) Mode Sensor A circuit between the Shift Motor/Mode sensor harness connector and the TIPM C4 harness connector.

Is the resistance above 5.0 ohms?

Yes

- Repair the (D201) Mode Sensor A circuit for an open.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests

No

- Go To 6



6. (G180) TIPM SENSOR RETURN CIRCUIT OPEN





Measure the resistance of the (G180) TIPM Sensor Return circuit between the Shift Motor/Mode sensor harness connector and the TIPM C4 connector.

Is the resistance above 5.0 ohms?

Yes

- Repair the (G180) Sensor Return circuit for an open.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests

No

- Replace the TIPM.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests



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

- Repair as necessary.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests

No

- Test complete.