Circuit Description
The instrument panel cluster (IPC) has an internal voltage sensor with a dedicated circuit that monitors the battery positive voltage circuit to determine if it is below 18 volts.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B1328 Device Power Circuit High
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The ignition positive voltage level is greater than 18 volts for 0.5 seconds.
Action Taken When the DTC Sets
| • | The odometer and the PRNDL displays do not illuminate. |
| • | The fuel gage and the engine coolant temperature gage default to 0. |
| • | The scan tool does not communicate with the instrument cluster. |
Conditions for Clearing the DTC
| • | The DTC becomes history when the conditions for setting the DTC are no longer present. |
| • | The history DTC clears after 100 malfunction free warm-up cycles. |
| • | The IPC receives the clear code command from the scan tool. |
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Instrument Cluster Schematics Connector End View Reference: Data Communication Connector End Views | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |
2 |
Does the voltage measure within the normal operating range? | 10-15 V | Go to Step 3 | Go to Charging System Test |
3 | Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 5 | Go to Step 4 |
4 | Replace the IPC. Refer to Control Module References for replacement, setup, and programming . Did you complete the replacement? | -- | Go to Step 5 | -- |
5 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
