[SOLVED] Jeep B1638 Code: Quick Fix For High Beam Control

The OBD code B1638 for Jeep indicates an issue with the right high beam bulb circuit.

Symptoms include the Engine Light being ON.

This code is commonly caused by a faulty right high beam bulb, open or shorted harness, poor electrical connection, or a faulty Front Totally Integrated Power Module (TIPM).

It is not a serious issue and can be fixed by inspecting and repairing the wiring harness and connectors related to the right high beam bulb.

Repair Importance Level	10.0 (Out of 10)
Estimated Repair Time	Approximately 1.0 hour
Repair Difficulty Level	10.0 (Out of 10)

Symptoms of the Jeep b1638 OBD Code

The Jeep B1638 fault code typically triggers when there is an issue with the passenger side airbag circuit.

Symptoms: Airbag warning light illuminated.
Chime sound when starting the vehicle.
Airbag system may not deploy in a collision.

Causes of the Jeep b1638 OBD Code

Possible triggers for Jeep fault code B1638 include issues with the passenger side airbag circuit.

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B1638 can be caused by a Faulty Right High Beam Bulb.
A Right High Beam Bulb harness that is open or shorted.
A Right High Beam Bulb circuit with a poor electrical connection.
Or a Faulty Front Totally Integrated Power Module (TIPM).

Fixing Jeep Error Code b1638 Step By Step

To resolve fault code Jeep B1638, inspect and repair the passenger airbag circuit as needed.

To fix Jeep OBDII code B1638, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
Next, check the wiring leading to the Occupant Restraint Controller (ORC) for any issues.
Inspect the ORC for proper connection and operation.
If no visible issues are found, consider resetting the ORC module using a scan tool.
Finally, if the problem persists, consider replacing the ORC module after verifying all wiring and connections are in good condition.

Cost Of Fixing Jeep b1638 Fault Code

Diagnosing and repairing fault code Jeep B1638 may involve replacing the passenger airbag module.

The cost to diagnose and fix Jeep OBD code B1638 will depend on the estimated 1. 0hour repair time.

Labor rates usually range from $75 to $150 per hour, so the cost can vary based on shop rates and the complexity of the repair.

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Details of the Jeep b1638 OBD Code

The Jeep B1638 code indicates a problem with the passenger side airbag circuit.

OBD code B1638 for Jeep vehicles indicates a problem with the Driver’s Seatbelt Tension Reducer Circuit.

This code is triggered by the Occupant Restraint Controller (ORC) module based on input signals from the seatbelt tension reducer circuit.

The ORC module monitors the seatbelt system for proper operation and triggers this code when an issue is detected with the driver’s seatbelt tension reducer circuit.

Mechanic’s Tech Notes

For Jeep code B1638, check for a faulty passenger airbag circuit.

To diagnose and fix OBDII code Jeep B1638, start by checking the Transmission Control Module (TCM) power and ground using a multimeter.

Verify TCM communication over the Controller Area Network (CAN) network with a scan tool.

If the TCM does not respond, reprogramming or reflashing may be necessary.

Visually inspect the wiring harness and connectors for any damage, and check connector pins for signs of being broken, bent, pushed out, or corroded.

This thorough inspection will help identify and address any issues causing the B1638 fault code.

FAQ

1. What does OBD code B1638 indicate in a Jeep vehicle?

OBD code B1638 in a Jeep indicates an issue with the right high beam bulb circuit. Check the bulb, harness, and connections for faults.

2. How can I diagnose the root cause of code B1638 in my Jeep?

Diagnose code B1638 in your Jeep by checking the right high beam bulb, harness, and connections for faults. Inspect TIPM and related components visually for issues.

3. What components should I inspect or replace to fix OBD code B1638 in a Jeep?

Inspect or replace right high beam bulb, bulb harness, TIPM, wiring harness, connectors. Check for damage, poor connections, broken pins, corrosion.

Wrap Up

If your Jeep is displaying OBD code b1638, you may experience issues with the passenger’s seatbelt pretensioner circuit.

This could be caused by a faulty seatbelt pretensioner, damaged wiring harness, or poor connection at the seatbelt pretensioner connector.

To address Jeep OBD code b1638, check the wiring harness for any visible damage, ensure proper connection at the seatbelt pretensioner connector, and test the seatbelt pretensioner for proper functionality.

Replace any damaged components or repair any faulty connections to resolve the issue effectively.