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 ThresholdDTC B1517 07: Battery Voltage Above Threshold
DTC B1517 5A: Battery Voltage Plausibility Failure
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+ | B1517 03, B1517 5A | B1517 03, B1517 5A | -- | -- |
B+ High resolution | B1517 03, B1517 5A | B1517 03, B1517 5A | -- | -- |
Ground | -- | B1517 03, B1517 5A | -- | -- |
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 system 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.
Conditions for Running the DTC
| • | The BCM has 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 V. |
| • | 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 V. |
| • | The engine speed is greater than 1,100 RPM. |
| • | The above conditions are met for 15 seconds. |
B1517 5A
The battery voltage differs by 2 V on the BCM battery sense circuits 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 set in multiple modules indicates a concern in the charging system. Refer to. |
| • | This DTC may be set by overcharging with a battery charger, or jump by starting. |
| • | Inspect the ground connection G409 and ensure that it is clean and tight. |
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 voltage at the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V
- Observe the scan tool BCM Battery Voltage parameter. The reading should be between 12.6 and 15.0 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, test for less than 3 Ω between the ground circuit terminal 9 X4 and ground.
- Ignition On, verify that a test lamp illuminates between the B+ circuit and terminal 10X4 and ground.
- If all circuits test normal, replace the BCM.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp does not illuminate, test the B+ circuits 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
