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Fig. 21: I/P Bulb Dimming 2 of 2 DIAGNOSTIC INFORMATION AND PROCEDURES DIAGNOSTIC CODE INDEX DIAGNOSTIC CODE INDEX DTC Description DTC B1395 B1395 03: Voltage Below Threshold DTC B2530 B2530 00: Front Fog Lamp Control Circuit DTC B2545 B2545 00: Backup Lamps Circuit DTC B2555 B2555 01: Passenger Compartment Lamp Control Circuit Short to Battery B2555 02: Passenger Compartment Lamp Control Circuit Short to Ground DTC B2575 2575 00: Headlamp Control Circuit DTC B257A B257A 00: Headlamp Switch Input Signal Mismatch
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Lighting - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
DIAGNOSTIC STARTING POINT - LIGHTING Begin the system diagnosis with the Diagnostic System Check - Vehicle . The Diagnostic The identification of the control modules which command the system The ability of the control modules to communicate through the serial data circuit The identification of any stored diagnostic trouble codes (DTCs) and their status The Use of the Diagnostic System Check - Vehicle will identify the correct procedure for DTC B1395 DTC B2580 B2580 00: Headlamp High Beam Control Circuit DTC B2585 B2585 00: Park Lamp Control Circuit DTC B2600 B2600 00: Daytime Running Lamp Control Circuit DTC B2610 B2610 00: Passenger Compartment Dimming 1 Circuit B2610 01: Passenger Compartment Dimming 1 Circuit Short to Battery B2610 02: Passenger Compartment Dimming 1 Circuit Short to Ground B2610 04: Passenger Compartment Dimming 1 Circuit Open DTC B2615 B2615 00: Passenger Compartment Dimming 2 Circuit B2615 01: Passenger Compartment Dimming 2 Circuit Short to Battery B2615 02: Passenger Compartment Dimming 2 Circuit Short to Ground B2615 04: Passenger Compartment Dimming 2 Circuit Open DTC B2625 B2625 00: Display Dimming Pulse Width Modulation (PWM) Output Circuit DTC B2645 B2645 03: Ambient Light Sensor Circuit Below Threshold DTC B2652 B2652 00: Passenger Compartment Dimming 3 DTC B3445 B3445 00: Stop Lamp Circuit DTC B3600 B3600 03: Voltage Below Threshold DTC B3884 B3884 00: Center High Mounted Stop Lamp (CHMSL) Circuit
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Lighting - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptors DTC B1395 03 Voltage Below Threshold DTC B1395 07 Voltage Above Threshold Diagnostic Fault Information Circuit/System Description Voltage for the interior backlighting components and stop lamp switch activation signal is The stop lamp switch is also supplied voltage on the same circuit for a stop lamp OFF signal to Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance I/P Dimming Voltage B1395 03 and B3600 03 B1395 03, B2652 00, and B3600 03 B1395 07 B1395 03, B1395 07 Stop Lamp Signal B1395 03 and B3600 03 - - -
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Lighting - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Conditions for Running the DTC The ignition is ON. Conditions for Setting the DTC B1395 03 The BCM detects a voltage that is lower than 0.33 volt on the I/P dimming voltage reference B1395 07 The BCM detects a voltage that is greater than 4.97 volts on I/P dimming voltage reference B3600 03 The BCM detects a voltage that is lower than 0.10 volt on the I/P dimming control circuit. Action Taken When the DTC Sets The I/P lamps are dim or not illuminated. The I/P lamps will not dim. The stop lamps are always ON. Conditions for Clearing the DTC The conditions for setting the DTC are no longer present. A history DTC clears after 100 malfunction-free ignition cycles. Reference Information Schematic Reference Interior Lights Dimming Schematics Exterior Lights Schematics Connector End View Reference Component Connector End Views Description and Operation
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Lighting - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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