Circuit Description
The BCM monitors the battery voltage through the battery positive voltage circuit. Refer to Body Control System Schematics.
Conditions for Running the DTC
The voltage supplied to the body control module is in the range of 7-26 volts.
Conditions for Setting the DTC
The BCM senses a battery voltage below or above the specified range of 9-16 volts.
The above condition lasts for at least 1 second.
Action Taken When the DTC sets
| • | The BCM will disable all its outputs when a high voltage condition is detected. |
| • | The setting of this DTC inhibits the setting of other DTCs. |
Conditions for Clearing the DTC
| • | A current DTC clears when the malfunction is no longer present. |
| • | A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction. |
Diagnostic Aids
| • | The following may cause an intermittent: |
| - | A damaged terminal |
| - | A backed out terminal |
| - | A poor terminal tension |
| - | A chafed wire |
| - | A broken wire inside the insulation |
| • | When diagnosing for an intermittent short or an open, manipulate the wire harness while watching the test equipment for changes. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This code may set inadvertently.
-
If the code set inadvertently the new calibration files will have the code turned off.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Body Control System Schematics Connector End View Reference: Body Control System Connector End Views | ||||
1 | Did you perform the Diagnostic System Check for the system exhibiting the symptom? | -- | Go to Step 2 | |
2 |
Is the battery voltage input parameter in the specified range? | 9.0-16.0 V | Go to Step 3 | Go to Step 4 |
Does the vehicle start and run normally? | -- | System OK | Go to Step 9 | |
4 |
Is the measured value in the specified range? | 9.0-16.0 V | Go to Step 6 | Go to Step 5 |
5 | Test the battery positive voltage circuit for a short to ground or an open. Refer to Circuit Description. Did you find and correct the condition? | -- | Go to Step 10 | Go to Battery Inspection/Test in Engine Electrical |
6 | Test the all of ground circuits of the BCM for an open or high resistance. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 7 |
7 | Inspect for poor connections at the module harness connectors. Refer to Testing for Intermittent and Poor Connections Testing for Intermittent Conditions and Poor Connections and Connector Repairs Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 8 |
8 |
Important: Perform the module programming or setup procedure if required. Replace the BCM. Refer to Body Control Module Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
Perform the BCM programming. Refer to Body Control Module (BCM) Programming/RPO Configuration . Did you complete the programming? | -- | Go to Step 10 | -- | |
10 | Operate the system in order to verify the repair. Did you find and correct the condition? | -- | System OK | Go to Step 2 |
