2010 Cadillac Truck SRX FWD V6-3.0L Page 453

2010 Cadillac Truck SRX FWD V6-3.0L Page 453

Control Module References (See: Testing and Inspection/Programming and Relearning) for the appropriate control module replacement,

programming and setup

B1370

DTC B1370

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 B1370 01

- Control Module Ignition On and Start Circuit Short to Battery

DTC B1370 06

- Control Module Ignition On and Start Circuit Open

Diagnostic Fault Information

Circuit/System Description

The vehicle power mode master is the body control module (BCM). The ignition switch is a low current switch with multiple discrete circuits to the

BCM.

The power mode master will activate relays and other direct outputs of the power mode master as needed according to the calculated power mode.

Some relays controlled by the BCM are switched ignition voltage outputs that are pass through circuits within the BCM directly from the ignition

switch. If these circuits short to ground, the B+ circuit fuse to the ignition switch will open.

Conditions for Running the DTC

B1370 01

Ignition switch is in the Accessory position.

B1370 06

Ignition switch is in the Accessory, Run, or Crank positions.

Conditions for Setting the DTC

B1370 01

Ignition circuit is shorted to voltage.

B1370 06

* Ignition circuit is open.

* Ignition or run/crank relay circuit is shorted to ground.

* B+ circuit of the ignition run/crank relay is open or shorted to ground.

* Ignition run/crank relay control circuit open, including relay coil and ground.

Action Taken When the DTC Sets

The Instrument Cluster still functions except check engine light is always off.