2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 448
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Retained Accessory Power Description and Operation (See: Power and Ground Distribution/Description and Operation/Retained Accessory Power
Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the X5 harness connector at the BCM.
2. Test for greater than infinite resistance between the BCM ignition circuit terminal 13 and ground.
瀚慖f less than specified, test for a short to ground.
3. If the circuit tests normal, test or replace the BCM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
Control Module References (See: Testing and Inspection/Programming and Relearning) for module replacement, setup, and programming
B1440
DTC B1440
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 B1440 00
- Power Mode Master Input Circuits Mismatch
Diagnostic Fault Information
Circuit/System Description
This vehicles power mode master (PMM) is the body control module (BCM). The ignition switch is a low current switch with multiple discrete
ignition switch signals to the PMM for determination of the power mode. The PMM receives the ignition switch signals, and additionally a
reference voltage signal from the BCM, through the ignition switch, and back to the BCM. There are redundancies within the PMM system that can
allow operation of certain subsystems when there are faults in the ignition switch circuits. Other information such as serial data input from other
