Cellular Communications System Diagnosis

DTC B1982 Source/Battery Voltage High:

Refer to Cellular Telephone Schematics. Electrical Diagrams

CIRCUIT DESCRIPTION
Battery Positive Voltage (B+) is supplied to the cellular telephone module connector on CKT 2240 (ORN) at terminals 4 an 16. The module monitors this voltage to determine if it is within a valid operating range.

CONDITIONS FOR SETTING DTC
The Battery Positive Voltage (B+) level rises above 15.5 volts for more than approximately 1.2 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 B1328 is current.

CONDITIONS FOR CLEARING DTC
^ A current DTC clears (status changes from current to history) if the Battery Positive Voltage (B+) level falls below 15 volts for approximately 1.2 seconds.
^ A history DTC clears after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.
^ Current and history DTCs may be cleared using a scan tool or using the IPC on-board clearing DTCs feature.

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:
1. Perform Diagnostic System Check before continuing with the diagnosis of this DTC.
2. Checks if the DTC is correctly set.
3. Checks for intermittent charging system problems.
4. Checks that DTC was not erroneously set.
5. Determines whether the malfunction is in the charging system or the Body Control Module.
7. Clear all DTC's after the repair procedure is complete.