Circuit Description
| • | For the Dash Integration Module (DIM), Battery Positive Voltage (B+) is supplied to the DIM on CKT 540 (ORN) at connector C3 terminal G. The DIM monitors this voltage to determine if it is within a valid operating range. |
| • | For the Integration Panel Integration Module (IPM), Battery Positive Voltage (B+) is supplied to the IPM at connector C1, terminal C1, CKT 440 (ORN). The IPM monitors battery voltage sent by Class 2 message by the DIM to determine if it is within a valid operating range. |
Conditions for Setting the DTC
The Battery Positive Voltage (B+) level falls below 9 volts for approximately 1.2 seconds or more.
Action Taken When the DTC Sets
| • | Stores a DTC B1983 in the module memory. |
| • | The module does not respond to any inputs when the voltage is less than 9 volts |
| • | No driver warning message will be displayed for this DTC. |
| • | Other module DTCs will not set while DTC B1983 is current. |
Conditions for Clearing the DTC
| • | A current DTC clears (status changes from current to history) if the battery positive voltage (B+) level rises above 9.5 volts for approximately 1 seconds. |
| • | A history DTC clears after 50 consecutive ignition cycles if the condition for the malfunction is no longer present. |
| • | Use the On-Board clearing DTCs feature. Refer to Diagnostic Trouble Code (DTC) Clearing in HVAC Systems with A/C - Automatic. |
| • | Use a scan tool. |
Diagnostic Aids
The module will not check for low Battery Positive Voltage (B+) during and for 2 seconds following the engine CRANK mode. This delay ensures that DTC B1983 will not erroneously set.
Test Description
The numbers below refer to the step numbers on the diagnostic table:
-
Perform Body Control Module Diagnostic System Check before continuing with the diagnosis of this DTC.
-
Checks that DTC was not erroneously set.
-
Determines whether the malfunction is in the charging system or the module which set the DTC.
-
Clear all DTCs after the repair procedure is complete.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Was the Body Control Module Diagnostic System Check performed? | -- | |||
2 |
Is the DTC still present? | -- | ||
3 | Did more than one module have the Voltage Low DTC prior to clearing? | -- | Go to Charging System in Engine Electrical | |
4 | Is the DTC set on only the IPM? | -- | ||
5 |
Is the Battery Positive Voltage (B+) greater than the specified value? | 9 V | ||
Is the measured voltage greater than the specified value? | 9 V | Go to Charging System in Engine Electrical | ||
7 | Replace the DIM. Is the module replacement complete? | -- | -- | |
8 | Replace the IPM. Is the module replacement complete? | -- | -- | |
Are all DTCs cleared? | -- | -- |
