2010 Cadillac CTS Sedan AWD V6-3.6L Page 139

2010 Cadillac CTS Sedan AWD V6-3.6L Page 139

瀚慖f DTC is set along with additional DTCs, repair the malfunction causing the DTCs before replacing the SDM.

Repair Instructions

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

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

B0056

DTC B0056-B0058

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 B0056 00

- Passenger Frontal Airbag Suppressed

DTC B0057 00

- Passenger Side Airbag Suppressed

DTC B0058 00

- Passenger Pretensioner Suppressed

Circuit/System Description

When the ignition is turned ON, the passenger presence system (PPS) and the inflatable restraint sensing and diagnostic module (SDM) performs

tests to diagnose critical malfunctions within itself. The PPS is used to monitor the weight of an occupant in the front passenger seat. If the pressure

from the occupant's weight is less than a specified value or an empty seat is detected, the PPS module will send a suppress signal to the SDM to

disable the instrument panel (I/P) module. When the PPS detects a fault within itself, then the PPS will communicate to the SDM through serial

data communications that a PPS fault is present. The SDM will disable the deployment of the module and then turn the AIR BAG indicator ON.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

This DTC is set when the SDM has commanded an air bag deployment while the PPS has determined that the front passenger seat has one the

following conditions:

* The pressure from the occupants weight is less than a specified value. The PPS module sent a disable signal to the SDM to disable the I/P

module.

* Empty front passenger seat

* A PPS fault was detected

Action Taken When the DTC Sets

* DTC B0056 and B0058 will only set if there is a child seated or the passenger seat is empty.

* DTC B0052, B0053, or B0055 will set along with this DTC.

* The SDM commands the AIR BAG indicator ON.

Conditions for Clearing the DTC

Any of the codes will set along with one of the following latched codes: DTC B0052, B0053, or B0055 and cannot be cleared.

Reference Information

Schematic Reference

SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)