Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | 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 - 12 VDTC B1517 07: Battery Voltage Above Threshold - 12 V
DTC B1517 5A: Battery Voltage Plausibility Failure - 12 V
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+ | B1517 03 | B1517 03 | -- | -- |
Ground | -- | B1517 03 | -- | -- |
Circuit/System Description
The body control module (BCM) has two circuits for monitoring 12 V battery voltage. The BCM monitors the battery 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.
Conditions for Running the DTC
The BCM is awake.
Conditions for Setting the DTC
B1517 03
The 12 V battery voltage is less than 11 V for 15 seconds.
B1517 07
The 12 V battery voltage is greater than 16 V for 15 seconds.
B1517 5A
The 12 V battery voltage differs by 2 V 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
Connector End View Reference
Description and Operation
Charging System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Engine running, accessories OFF, measure and record the battery voltage at the 12 V battery terminals. The voltage should be between 12.6 and 15.0 V.
- Observe the scan tool BCM Battery Voltage parameter and the Batt. Voltage High Res. parameter. Both readings should be between 12.60 and 15 V.
| ⇒ | If not within the specified range, refer to Charging System Test. |
Circuit/System Testing
- Ignition OFF, disconnect the harness connectors at the BCM.
- Ignition OFF and scan tool disconnected, open and close the driver door, and wait 30 seconds. Test for less than 5 Ω between the ground circuit terminals listed below and ground.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminals listed below and ground.
- If all circuits test normal, replace the BCM.
| • | Terminal 1 X3 |
| • | Terminal 5 X3 |
| • | Terminal 9 X4 |
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| • | 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. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM replacement, setup, and programming.
