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DTC B3588

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 Descriptor

DTC B3588 00: Rear Fog Lamp Switch Circuit Malfunction

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Rear Fog Lamp Switch Signal

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B3588 00

Circuit/System Description

The rear fog lamp switch signal circuit is grounded through a resistor momentarily by pressing the rear fog lamp switch. The body control module (BCM) energises the rear fog lamp supply voltage circuit which illuminates the rear fog lamp.

Conditions for Running the DTC

    • The ignition is turned ON.
    • Low beam is illuminated.
    • Rear fog lamp switch activated.

Conditions for Setting the DTC

Rear Fog Lamp switch stuck.

Action Taken When the DTC Sets

The rear fog lamp is inoperative.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Reference Information

Schematic Reference

Fog Lamps Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Exterior Lighting Systems Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool Rear Fog Lamp Switch parameter. The reading should change between Active/Inactive when changing between pressed and released rear fog lamp switch button.

Circuit/System Testing

  1. Ignition OFF, disconnect the X1 and X3 harness connectors at the K9 Body Control Module.
  2. Ignition ON, test for less than 0.3 V between the signal circuit terminal 9 X1 and ground.
  3. If greater than the specified value, test the circuits listed below for a short to voltage. If the circuit tests normal, replace the S30 Headlamp Switch.
    • Signal circuit terminal 9 X1
    • 12 V reference voltage circuit terminal 4 X3
  4. Ignition OFF, test for infinite resistance between the signal circuit terminal 9 X1 and ground.
  5. If less than infinite resistance, test the circuits listed below for a short to ground. If the circuit tests normal, replace the S30 Headlamp Switch.
    • Signal circuit terminal 9 X1
    • 12 V reference voltage circuit terminal 4 X3
  6. Test for 7.4-7.9 kΩ between the signal circuit terminal 9 X1 and the 12 V reference voltage circuit terminal 4 X3.
  7. If less than 7.4 kΩ, test the signal circuit and the 12 V reference circuit for a short circuit. If the circuit tests normal, replace the S30 Headlamp Switch.
    If greater than 7.9 kΩ, test the signal circuit and the 12 V reference circuit for an open/high resistance. If the circuit tests normal, replace the S30 Headlamp Switch.
  8. Test for 2.0-2.4 kΩ between the signal circuit terminal 9 X1 and the 12 V reference voltage circuit terminal 4 X3 while pressing the rear fog lamp switch.
  9. If not the specified range, replace the S30 Headlamp Switch.
  10. If all circuits test normal, replace the K9 Body Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Headlamp Switch Replacement
    • Control Module References for BCM replacement, setup and programming
   


© Copyright Chevrolet. All rights reserved
   


© Copyright Chevrolet. All rights reserved