C1404

C1404-TRANSFER CASE RANGE POSITION SENSOR CIRCUIT LOW





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

- When Monitored:
Ignition on.

Battery voltage between 9.0 and 16.0 volts.

- Set Condition:
The Totally Integrated Power Module (TIPM) detects a short to ground on the Mode Sensor A circuit for more than five seconds.





1. DTC IS ACTIVE
1. Start the engine and allow it to idle.
2. Move the Transfer Case Lever to each position several times.
3. With the scan tool, read the DTCs.

Is the status Active for this DTC?

Yes

- Go To 3

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. ATTEMPT TO SET THE OPPOSITE DTC
1. Turn the ignition off.
2. Disconnect the Transfer Case Selector Switch harness connector.
3. Turn the ignition on.
4. With the scan tool, read the TIPM DTCs.

Does the scan tool display DTC C1405-TRANSFER CASE RANGE POSITION SENSOR CIRCUIT HIGH?

Yes

- Replace the Transfer Case Selector Switch. Position Sensor - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE (D201) MODE SENSOR A CIRCUIT FOR A SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the TIPM C1 harness connector.
3. Measure the resistance between ground and the (D201) Mode Sensor A circuit.

Is the resistance above 10k Ohms?

Yes

- For Power Wagon vehicles, Go To 4
- For all others, replace the Totally Integrated Power Module (TIPM). Totally Integrated Power Module (TIPM) - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the short to ground in the (D201) Mode Sensor A circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK THE (D201) MODE SENSOR A CIRCUIT FOR A SHORT TO THE (K91) SENSOR GROUND CIRCUIT




1. Measure the resistance between the (D201) Mode Sensor A circuit and the (K91) Sensor Ground circuit at the Transfer Case Selector Switch harness connector.

Is the resistance above 10k Ohms?

Yes

- Replace the Totally Integrated Power Module (TIPM). Totally Integrated Power Module (TIPM) - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the short between the (D201) Mode Sensor A circuit and the (K91) Sensor Ground circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.