2010 Cadillac Truck SRX AWD V6-3.0L Page 476

2010 Cadillac Truck SRX AWD V6-3.0L Page 476

Circuit/System Testing

1. Ignition OFF, disconnect the harness connectors X1, X2, X4, X5, and X6 at the K9 BCM.

2. Ignition OFF, test for less than 3.0 Ohms between the ground circuit terminals listed below and ground:

* Terminal 1 X1

* Terminal 2 X2

瀚慖f not within the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminals listed below and ground:

* Terminal 2 X1

* Terminal 3 X1

* Terminal 4 X1

* Terminal 1 X2

* Terminal 3 X2

* Terminal 4 X2

* Terminal 20 X4

* Terminal 3 X5

* Terminal 4 X5

瀚慖f the test lamp does not illuminate, test the B+ circuits for a short to ground or an open/high resistance.

4. If all the circuits test normal, test or replace the K9 BCM.

Repair Instructions

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

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

B1527

DTC B1527

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 Descriptor

DTC B1527 00

- High Parasitic Load Detected

Circuit/System Description

The body control module (BCM) monitors the state of charge of the electrical system. If the BCM senses that the state of charge at ignition On is 30

percent lower than what it was when the engine was running.

Conditions for Running the DTC

The ignition must be in Accessory or Run mode for this code to set.

Conditions for Setting the DTC

The state of charge at ignition ON is 30 percent lower than when the engine was running and battery drain is more than 2 A.

Action Taken When the DTC Sets

There is no battery telltale illuminated or DIC message displayed.

Conditions for Clearing the DTC