Circuit Description
The dash integration module (DIM) has an internal voltage sensor with a dedicated circuit that checks the battery positive voltage and battery negative circuit voltage to determine if it is between 9.0-15.9 volts.
Conditions for Running the DTC
This DTC shall run only if the DIM has power, ground and the ignition is not in START mode. This DTC shall execute regardless of the battery voltage, except when the DTC B1390 is set current.
Conditions for Setting the DTC
This DTC shall be set as current when the voltage falls below 15.5 volts for 1,200 milliseconds.
Action Taken When the DTC Sets
A message shall be sent out on the class 2 lines to notify all other modules of high battery voltage.
Conditions for Clearing the MIL/DTC
In order to clear the DTC from a current status the voltage shall be greater than 16.0 volts for 1,200 milliseconds.
Diagnostic Aids
DTC B1328 may set if the vehicle is connected to a battery charger on fast or boost charge.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Engine Electrical Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the scan tool indicate that DTC B1328 is current in more than 1 module? | -- | Go to Step 3 | Go to Step 4 |
3 | With a scan tool, observe the Battery Voltage Signal parameter in the DIM. Does the scan tool indicate that the voltage is greater than the specified value? | 16.0 V | Go to Charging System Test | Go to Step 5 |
4 | With a scan tool, observe the Battery Voltage Signal parameter in the affected module. Does the scan tool indicate that the voltage is greater than the specified value? | 16.0 V | Go to Charging System Test | Go to Step 5 |
5 |
Important: Perform the setup procedure for the module setting the code, if necessary. Replace the affected module. Refer to Control Module References in Body Control Systems. Did you complete the replacement? | -- | Go to Step 6 | -- |
6 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
