Chevrolet Silverado / GMC Sierra. Manual — part 2471
Fig. 21: I/P Bulb Dimming 2 of 2
Courtesy of GENERAL MOTORS CORP.
DIAGNOSTIC INFORMATION AND PROCEDURES
DIAGNOSTIC CODE INDEX
DIAGNOSTIC CODE INDEX
DTC
Description
DTC B1395
B1395 03: Voltage Below Threshold
B1395 07: Voltage Above 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
System Check - Vehicle will provide the following information:
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
diagnosing the system and where the procedure is located.
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
B2645 07: Ambient Light Sensor Circuit Above Threshold
DTC B2652
B2652 00: Passenger Compartment Dimming 3
DTC B3445
B3445 00: Stop Lamp Circuit
DTC B3600
B3600 03: Voltage Below Threshold
B3600 07: Voltage Above 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
supplied from the body control module (BCM). The BCM applies a voltage reference through the
instrument panel (I/P) dimming voltage reference circuit to the interior lamp dimming switch,
which is part of the headlamp switch. When the dimming switch is placed in the desired position,
the dimmed voltage setting is applied from the interior lamp dimming switch through the I/P
dimming control circuit to the BCM. The BCM then applies the dimmed voltage to the I/P lamps
supply voltage circuit and they dim to the correct level.
The stop lamp switch is also supplied voltage on the same circuit for a stop lamp OFF signal to
the BCM. When the stop lamp switch is activated the voltage signal circuit to the BCM is opened
prompting the BCM to illuminate the stop lamps.
Circuit
Short to
Ground
Open/High
Resistance
Short to
Voltage
Signal
Performance
I/P Dimming Voltage
Reference
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
circuit.
B1395 07
The BCM detects a voltage that is greater than 4.97 volts on I/P dimming voltage reference
circuit.
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
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст