Circuit Description
Battery Positive Voltage (B+) is supplied to the Instrument Cluster (IPC) at connector C2, terminal A2, CKT 440 (ORN). The IPC monitors this voltage to determine if it is within a valid operating range.
Conditions for Setting the DTC
The Battery Positive Voltage (B+) level falls below 9.5 volts for approximately 1.2 seconds or more.
Actions Taken When the DTC Sets
| • | Stores a DTC B1983 in the IPC memory. |
| • | The IPC does not respond to any inputs when the voltage is less than 9.5 volts. |
| • | No driver warning message will be displayed for this DTC. |
| • | Other IPC DTCs will not set while DTC B1983 is current. |
Conditions for Clearing the DTC
| • | The Battery Positive Voltage (B+) level rises above 9.5 volts for approximately 1.2 seconds. |
| • | Use the On-Boards clearing DTCs feature. |
| • | Use a scan tool. |
Diagnostic Aids
The IPC will not check for low Battery Positive Voltage (B+) during and for two seconds following the engine START 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 the Instrument Cluster (IPC) Diagnostic System Check before continuing with the diagnosis of this DTC.
-
Checks that DTC was not set erroneously.
-
Determines whether the malfunction is in the charging system or the Instrument Cluster (IPC).
-
Clear all DTCs after the repair procedure is complete.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Was the Instrument Cluster (IPC) Diagnostic System Check performed? | -- | |||
Is the Battery Positive Voltage (B+) greater than the specified value? | 9.5 V | |||
Is the measured voltage less than the specified value? | 9.5 V | Go to Charging System Check in Engine Electrical | ||
4 | Replace the Instrument Cluster (IPC). Refer to Instrument Cluster Replacement . Is the module replacement complete? | -- | -- | |
Are all DTCs cleared? | -- | -- |
