B1517

DTC B1517

Diagnostic Instructions

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



DTC Descriptors
DTC B1517 03
- Battery Voltage Below Threshold


DTC B1517 07
- Battery Voltage Above Threshold


DTC B1517 5A
- Battery Voltage Plausibility Failure




Diagnostic Fault Information






Circuit/System Description

The body control module (BCM) has designated circuits for monitoring vehicle system voltage. The BCM monitors the system voltage to ensure that the voltage stays within the proper range. Damage to components, and incorrect data may occur when the voltage is out of range. The BCM monitors the system voltage over an extended length of time. If the BCM detects the system voltage is outside an expected range for the calibrated length of time, or the BCM battery sense circuits differ by 2 volts, DTC B1517 will set.


Conditions for Running the DTC

The BCM is awake.


Conditions for Setting the DTC

B1517 03

The battery voltage is less than 11 volts for 15 seconds.

B1517 07

The battery voltage is greater than 16 volts for 15 seconds.

B1517 5A

The battery voltage differs by 2 volts on the BCM battery sense circuits for 10 seconds.


Action Taken When the DTC Sets

The charge indicator turns ON.


Conditions for Clearing the DTC

* This DTC passes when the malfunction is no longer present.
* A history DTC will clear after 50 consecutive ignition cycles have occurred without a malfunction.



Reference Information
Schematic Reference

* Body Control System Schematics (Electrical Diagrams)
* Starting and Charging Schematics ([1][2]Electrical Diagrams)

Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Charging System Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

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


Circuit/System Verification

1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 volts.

• If not within the specified range, Refer to Charging System Test (Charging System Test) .

2. Observe the BCM scan tool Battery Voltage parameter and the Batt. Voltage High Res. parameter. Both readings should be between 12.60 and 15.00 volts.



Circuit/System Testing

1. Ignition OFF, disconnect the harness connectors at the BCM.
2. With the ignition OFF and the scan tool disconnected, open and close the drivers door, and wait 30 seconds. Test for less than 5 ohms between the following ground circuit terminals and ground:

* Terminal 1 X3
* Terminal 5 X3
* Terminal 9 X4


• If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify that a test lamp illuminates between the following B+ circuit terminals and ground:

* Terminal 3 X3
* Terminal 10 X4


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

4. If all circuits test normal, replace the BCM.



Repair Instructions

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


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