2010 Cadillac Truck SRX AWD V6-3.0L Page 711

2010 Cadillac Truck SRX AWD V6-3.0L Page 711

1. Ignition ON, observe the function of the E5L stop lamp-left while commanding the Left Brake Lamp ON and OFF with a scan tool. The E5L

stop lamp-left should turn ON and OFF while changing between the commanded states

2. Observe the function of the E5R stop lamp-right while commanding the Right Brake Lamp ON and OFF with a scan tool. The E5R stop

lamp-right should turn ON and OFF while changing between the commanded states.

Circuit/System Testing

1. Ignition OFF, disconnect the X1 harness connector at the appropriate E5 tail lamp.

2. Test for less than 30 ohm between the ground circuit terminal C and ground.

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance

3. Connect a test lamp between the control circuit terminal A and ground

4. Ignition ON, command the Brake Lamp ON and OFF with a scan tool, the test lamp should turn ON and OFF when changing between the

commanded states.

瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.

瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the K9 BCM.

5. If all circuits test normal, test or replace the E5 tail lamp.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Tail Lamp Replacement (See: Lighting and Horns/Tail Lamp/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup and programming

B3882

DTC B3881 or B3882

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B3881 02

- Tail Lamp Circuit Short to Ground

DTC B3881 04

- Tail Lamp Circuit Open

DTC B3882 02

- Right Tail Lamp Circuit Short to Ground

DTC B3882 04

- Right Tail Lamp Circuit Open

Diagnostic Fault Information

Circuit/System Description

The brake pedal position sensor is used to sense the action of the driver application of the brake pedal. The brake pedal position sensor provides an

analog voltage signal to the body control module (BCM). The BCM will apply battery voltage to the right, left and center stop lamp control circuits.