B1517
DTC B1517
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC B1517 03
- Battery Voltage Below Threshold - BCM 12V
DTC B1517 07
- Battery Voltage Above Threshold - BCM 12V
DTC B1517 5A
- Battery Voltage Plausibility Failure - BCM 12V
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) has circuits for monitoring vehicle 12V 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. The system voltage message is sent to the other modules. The message will default to 12.9 volts if there is a plausibility failure.
Conditions for Running the DTC
* The BCM has 12V power and ground.
* The ignition is not in the START position.
Conditions for Setting the DTC
B1517 03
* The battery voltage is less than 11 volts.
* The engine speed is greater than 1,100 RPM.
* The above conditions are met for 15 seconds.
B1517 07
* The battery voltage is greater than 16 volts.
* The engine speed is greater than 1,100 RPM.
* The above conditions are met for 15 seconds.
B1517 5A
The voltage of the two BCM 12V battery sense circuits differs by 2 volts for 10 seconds.
Action Taken When the DTC Sets
* The instrument panel cluster (IPC) illuminates the charge indicator.
* The driver information center (DIC) displays the SERVICE BATTERY CHARGING SYSTEM warning message.
Conditions for Clearing the DTC
* The DTC will clear current status when fault is no longer present.
* The history DTC will clear after 50 consecutive ignition cycles have occurred without a malfunction.
Diagnostic Aids
* A high or low voltage DTC in multiple modules indicates a concern in the 12V charging system. Refer to Charging System Test. Charging System Test
* Inspect the ground connections G103 and G201, and insure that they are clean and tight.
* This DTC may be set by overcharging with a battery charger.
Circuit/System Verification
1. Measure and record the voltage at the 12V battery terminals with engine off, and again with the engine running. Verify that the 12V battery voltage is 11-17 volts with the engine off and with the engine running.
• If not within the specified range, refer to Charging System Test. Charging System Test
2. Observe the scan tool BCM Battery Voltage parameter. The scan tool data should not differ from the recorded 12V battery voltage by more than 2 volts.
• If not within the specified range, refer to Circuit/System Testing.
3. Refer to Diagnostic Aids.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connectors X3 and X4 from the BCM.
2. Test for less than 1.0 ohm between the ground circuits X3 terminal 1, X3 terminal 5, and X4 terminal 9 and the negative terminal of the 12V battery.
• If greater than the specified value, repair the ground circuit.
3. Ignition ON, verify that a test lamp illuminates between the 12V B+ circuits X3 terminal 3 and X4 terminal 10 of the BCM and ground.
• If the test lamp does not illuminate, test the 12V 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 after completing the diagnostic procedure. Verification Tests