Circuit Description
The 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 9.0 volts for 1200 milliseconds. |
| • | When the vehicle exits START the DIM shall delay checking the voltage for 2 seconds. |
Action Taken When the DTC Sets
A message shall be sent out on the class 2 lines to notify all other modules of low battery voltage.
Conditions for Clearing the MIL/DTC
In order to clear the DTC from a current status the voltage shall be greater than 9.54 volts for 1200 milliseconds.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Engine Electrical Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the scan tool indicate the battery voltage is greater than the specified value? | 9.5 V | Go to Step 3 | Go to Battery Inspection/Test |
3 | Inspect for poor connections at the harness connector of the DIM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 5 | Go to Step 4 |
4 |
Important: Perform the setup procedure for the DIM. Replace the DIM. Refer to Dash Integration Module Replacement . Did you complete the replacement? | -- | Go to Step 5 | -- |
5 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
