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 - BCMDTC B1517 07: Battery Voltage Above Threshold - BCM
DTC B1517 5A: Battery Voltage Plausibility Failure - BCM
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
BCM B+ | B1395 03, B1529 03 | B1395 03, B1529 03 | -- | -- |
RVC B+ | B1517 5A | B1517 5A | -- | -- |
Ground | -- | B1517 03, B1517 5A | -- | -- |
Typical Scan Tool Data
Circuit | Short to Ground | Open | Short to Voltage |
|---|---|---|---|
Operating Conditions: Ignition ON, Engine OFF. Parameter Normal Value: 12.60 Volts | |||
BCM B+ | 25.60 Volts | 25.60 Volts | -- |
Circuit | Short to Ground | Open | Short to Voltage |
|---|---|---|---|
Operating Conditions: Ignition ON, Engine OFF. Parameter Normal Value: 12.600 Volts | |||
RVC B+ | 0.000 Volts | 0.000 Volts | -- |
Circuit/System Description
The body control module (BCM) monitors the vehicle system voltage on 2 circuits: the BCM B+ circuit terminal 3 X3, which is fed through the BCM fuse, and the high resolution B+ circuit termina 10 X4, which is fed through the RVC fuse. 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, or if the two BCM battery sense circuits differ, DTC B1517 will set.
Conditions for Running the DTC
B1517 03, B1517 07
The ignition is ON.
B1517 5A
The BCM is awake.
Conditions for Setting the DTC
B1517 03
One of the following conditions exists for 15 seconds:
| • | The engine is OFF and the battery voltage is less than 11 volts. |
| • | The engine is running and the battery voltage is less than 12 volts. |
B1517 07
The battery voltage is greater than 16 volts for 15 seconds.
B1517 5A
The voltage on the two BCM battery sense circuits differ by 3 volts for 10 seconds.
Action Taken When the DTC Sets
| • | The charge indicator turns ON. |
| • | The driver information center (DIC) displays the SERVICE BATTERY CHARGING SYSTEM warning message. |
Conditions for Clearing the DTC
| • | DTC B1517 03 and B1517 07 will pass when the condition for setting the DTC is no longer present for 15 seconds. |
| • | DTC B1517 5A will pass when the voltage on the two BCM battery sense circuits are within 0.5 volts of each other for 1 second. |
| • | A 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 charging system. |
| • | This DTC may be set by overcharging with a battery charger, or by jump starting. |
Reference Information
Schematic Reference
Body Control System Schematics
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 battery terminals. The voltage should be between 12.6 and 15.0 volts.
- Observe the scan tool BCM Battery Voltage parameter and the Batt. Voltage High Res. parameter. Both readings should be between 12.60 and 15.00 volts.
| ⇒ | 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 1 minute. Test for less than 5 ohms 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 appropriate 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.
