B1597: Dim Panel Increase Input Circuit Failure

Definition: This code indicates a malfunction in the circuit responsible for increasing the illumination of the dashboard panel. It typically involves issues with wiring, connectors, or components related to the dimming function.

B1597: Dim Panel Increase Input Circuit failure

Typical severity: Medium

Common Causes

B1597: Dim Panel Increase Input Circuit failure

Common causes:

• Faulty dim panel increase switch
• Short circuit or open circuit in the wiring related to the dim panel increase input circuit
• Defective body control module (BCM)

 

Common Misdiagnosis

OBD2 Code: B1597

Description: Dim Panel Increase Input Circuit Failure

Common Misdiagnosis: Replacing the dimmer switch without checking for wiring issues or a faulty instrument cluster.

 

Common Diagnostic Steps

OBD2 Code: B1597

Description: Dim Panel Increase Input Circuit Failure

• Inspect the dimmer switch for proper operation and connectivity.
• Check for any blown fuses related to the instrument panel or dimmer circuit.
• Examine wiring and connectors for signs of damage, corrosion, or disconnection in the dimmer circuit.
• Test the voltage at the dimmer switch to ensure it is receiving power and sending a signal when adjusted.
• Use a scan tool to check for any additional codes that may indicate related issues with other components.
• If applicable, inspect the body control module (BCM) for faults or malfunctions affecting the dimming function.
• Consult vehicle-specific repair manuals or technical service bulletins (TSBs) for known issues related to this code on your vehicle model.