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 Instrument 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 rises above 15.5 volts for more than approximately 1 seconds.
Action Taken When the DTC Sets
| • | DTC B1982 is stored in the module memory. |
| • | The module will not respond to inputs when the voltage is greater than 16 volts |
| • | No driver warning message will be displayed for this DTC. |
| • | Other module DTCs will not set while DTC B1982 is current. |
Conditions for Clearing the DTC
| • | A current DTC clears (status changes from current to history) if the Battery Positive Voltage (B+) level falls below 15 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
This DTC may set when the vehicle is placed on a battery charger, on fast charge, for a long period of time.
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 if the DTC is correctly set.
-
Checks for intermittent charging system problems.
-
Checks that DTC was not erroneously set.
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Determines whether the malfunction is in the charging system or the Body Control Module.
-
Clear all DTC's after the repair procedure is complete.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Was the Body Control Module Diagnostic System Check performed? | -- | |||
Is the DTC still present? | -- | |||
Did more than one module have the Voltage High 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+) less than the specified value? | 15.5 V | ||
Is the measured voltage less than the specified value? | 15.5 V | Go to Charging System in Engine Electrical | ||
7 | Replace the module. Is the module replacement complete? | -- | -- | |
8 | Replace the IPM. Is the module replacement complete? | -- | -- | |
Are all DTCs cleared? | -- | -- |
