B1453

DTC B1453

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using the diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptor
DTC B1453
- Vehicle Speed Signal

Circuit/System Description

When the ignition switch is turned to ON, the inflatable restraint sensing and diagnostic module (SDM) will perform turn-on test to diagnose critical malfunctions within SDM itself.

The SDM continuously receives vehicle speed signal from the instrument panel cluster. If driver seat belt is unbelted, the SDM gives the such alerts as warning lamp and sound according to vehicle status.

Conditions for Running the DTC

Ignition voltage is within the normal operating voltage range.

Conditions for Setting the DTC

The SDM can not receive vehicle speed signal from the instrument panel cluster.

Action Taken When the DTC Sets

The SDM commands the air bag indicator ON.

Conditions for Clearing the DTC

The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.

Reference Information
Schematic Reference

SIR Schematics (without WHB) (SIR Schematics (without WHB))SIR Schematics (WHB) (SIR Schematics (WHB))
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Circuit/System Testing

Note: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

* Instrument panel cluster
* SDM
* Instrument panel cluster wiring harness connector
* SDM wiring harness connector

1. Ignition Off, wait one minute for SDM to discharge.
2. Disconnect the instrument panel cluster (IPC) connector.
3. Disconnect the SDM connector.
4. Check for 0 ohms between terminal 57 of SDM and terminal 14 of the IPC.

• If resistance is not as specified, test circuit for an open or high resistance.

5. Check for infinite resistance between terminal 57 of SDM and ground.

• If resistance is not as specified, test circuit for a short to ground. If OK, replace the IPC.

• Use the scan tool in order to clear the DTCs, if DTC B1453 sets again, replace the SDM.

Repair Instructions

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

Control Module References (Programming and Relearning) for IPC and SDM replacement, setup, and programming