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
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. Other modules also monitor system voltage the system voltage message is sent to the other modules and will default to 12.9 volts.
Conditions for Running the DTC
The DTC shall run only if the BCM has power, ground, and the ignition is not in the START mode. This DTC shall execute regardless of battery voltage.
Conditions for Setting the DTC
B1517 03
The battery voltage falls below 11 volts, engine speed greater than 1,100 RPM for 15 seconds.
B1517 07
The battery voltage is greater than 16 volts, engine speed greater than 1,100 RPM 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 driver information center (DIC) displays the SERVICE BATTERY CHARGING SYSTEM warning message and the Charge Indicator on the instrument panel cluster (IPC) illuminates.
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 set in multiple modules indicates a concern in the charging system.
* A possible cause of this DTC could be overcharging with a battery charger or jump starting.
* A high or low voltage value in multiple modules indicates a concern in the charging system.
Circuit/System Testing
B1517 03, B1517 07
1. Engine running, measure and record the voltage at the battery terminals.
2. Verify that the battery voltage is 12.6-15.5 volts.
3. If the battery voltage is not within the specified range, refer to Charging System Test. Charging System Test
4. Engine running, observe the scan tool BCM battery positive voltage parameter.
5. The battery terminal and BCM parameter should not differ by more than 2 volts.
6. Ignition OFF, disconnect the harness connectors at the BCM.
7. Ignition OFF, test for less than 3.0 ohms between the ground circuit X4 terminal 9 and ground.
• If not within the specified range, test the ground circuit for an open/high resistance.
8. Ignition On, verify a test lamp illuminates between the B+ circuits X3 terminal 3 and X4 terminal 10 and ground.
• If the test lamp did not illuminate, test the B+ circuits for a short to ground or an open/high resistance.
9. If all the circuits test normal, test or replace the BCM.
B1517 5A
1. Verify that DTC B1517 5A is set as current.
2. Ignition OFF, disconnect the harness connectors from the BCM.
3. Ignition OFF, test for less than 3.0 ohms between the ground circuit X4 terminal 9 and ground.
• If not within the specified range, test the ground circuit for an open/high resistance.
4. Ignition ON, test the B+ circuits X3 terminal 3 and X4 terminal 10 to the ground circuit X4 terminal 9.
5. The B+ circuits should not differ by more than 2 volts.
• If not within the specified range, test the affected circuit for a short to ground or an open/high resistance.
6. If all circuits test normal, replace the BCM.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests