B1634 - FAULT CODE - OBD2

B1634 CHRYSLER, DODGE, JEEP, RAM: LEFT HIGH BEAM CONTROL CIRCUIT HIGH

The TIPM (Totally Integrated Power Module) is a controller that works as an intelligent fuse box for most of the vehicle’s electrical system. Its purpose is to observe the commands of several modules and switches, which are provided in the form of voltage. The Totally Integrated Power Module is located in the engine compartment near the battery. It is connected directly to the B+ cable through a bolt located on the top of the controller, and it is grounded by electrical connectors. It has internal relays, fuses, and a microprocessor that perform tasks commanded by the FCM.

The OBDII diagnostic code B1634 for Chrysler, Dodge, Jeep, and RAM vehicles is related to the left high beam. It is set when the TIPM detects that the left high beam does not meet the factory specifications due to high voltage.

• The Check Engine turns on.

Reasons for setting the B1634 OBD2 fault code:

• Left high beam bulb circuit wires may be damaged.
• Left high beam bulb circuit connections may be faulty, which causes erratic operation.
• The left high beam bulb may be faulty.
• The fully integrated Front End Power Module may have shortcomings.

To troubleshoot DTC B1634 OBDII, try this:

• First, consult the Technical Service Bulletins.
• Check for damage to the left high beam bulb circuit wiring and connectors. Look for damages caused by corrosion or wear. If such conditions are found, make repairs.
• Make electrical tests on the left high beam bulb circuit to verify that it is not open due to faulty electrical connections. If the voltages of the circuit do not match those specified by the manufacturer, make the necessary repairs.
• Check the condition of the left high beam bulb. If any damage is found, consider replacing the bulb.