B1453

DTC B1453

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this 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 Descriptors
DTC B1453 01
- Run and Crank/On and Start Power Circuit - Short to Battery

DTC B1453 06
- Run and Crank/On and Start Power Circuit - Short to Ground or Open

Diagnostic Fault Information





Circuit/System Description

The Run and Crank/On and Start Power signal connects the Serial Data Gateway Module (SDGM) along with numerous other modules to the vehicle 12-volt system through a fused relay in the fuse block - underhood. This relay is closed by the Body Control Module (BCM) based on the key being in either the Run or Crank position.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

B1453 01

Ignition is in ACC position.

B1453 06

Ignition is in RUN position.

Conditions for Setting the DTC

B1453 01

Run and Crank/On and Start Power Circuit is more than 2.5 volts.

B1453 06

Run and Crank/On and Start Power Circuit is less than 2.5 volts.

Action Taken When the DTC Sets

DTC B1453 is a Type C DTC.

Conditions for Clearing the DTC

DTC B1453 is a Type C DTC.

B1453 01

Run and Crank/On and Start Power Circuit is less than 2.5 volts.

B1453 06

Run and Crank/On and Start Power Circuit is more than 2.5 volts.

Diagnostic Aids

Many controllers such as the power inverter module (PIM), transmission control module (TCM), and inflatable restraint sensing and diagnostic module (SDM) will set a DTC for a problem with the Run and Crank/On and Start Power Voltage circuit. Confirm that they do not have DTCs before only investigating the SDGM.

Reference Information
Schematic Reference

Hybrid Controls Schematics ()
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Drive Motor Generator Control Module Description and Operation ()
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)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the SDGM harness connector X2 at the SDGM, verify that a test lamp does not illuminate between the ignition circuit terminal 20 and ground.

• If the test lamp illuminates, test the signal circuit terminal 20 for a short to voltage.

2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 20 and ground.

• If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

3. If all circuits test normal, replace the SDGM.

Repair Instructions

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

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