* Lumbar horizontal motor terminal C and terminal D
* Adjustable pedal motor terminal 4 and terminal 5
DTC B1335 42 or B1335 4B
Verify that DTC B1335 42 or B1335 4B is not set.
If either DTCs is set, replace the MSM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Front Seat Recliner Actuator Motor Replacement ()
* Seat Lumbar Sub System Replacement ()
* Front Seat Adjuster Replacement (with HP2) ()Front Seat Adjuster Replacement (without HP2) ()
* Brake Pedal Assembly Replacement (See: Accessories and Optional Equipment/Pedal Positioning System/Service and Repair/Removal and
Replacement/Brake Pedal Assembly Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for MSM replacement, setup, and programming
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
- Device Ignition 1 (ON and START) Circuit Short to Battery
DTC B1370 06
- Device Ignition 1 (ON and START) Circuit Short to Ground or Open
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 modules
and DTCs is also used to determine what power mode signals and information is transmitted by the PMM. The BCM logic uses all this information
