Circuit Description
When the ignition switch is in the UNLOCK position, certain class 2
messages do not transmit. The instrument panel cluster (IPC) suspends the
operation of the indicators and the gages that are dependent on these
messages until the ignition switch is no longer in the UNLOCK position.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The ignition 0 voltage circuit is less than 75 percent of battery voltage
for more than 1 second.
Action Taken When the DTC Sets
| • | The Odometer and 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 IPC. |
Conditions for Clearing the DTC
| • | The ignition 0 voltage circuit is greater than 75 percent
of battery positive voltage. The DTC becomes history when the conditions for
setting the DTC are no longer present. |
| • | A history DTC will clear after 100 malfunction free warm-up
cycle. |
| • | The IPC receives the clear code command from the scan tool. |
Diagnostic Aids
| • | When the instrument panel cluster (IPC) detects a low voltage
at the ignition 0 voltage circuit, the IPC will not communicate with the scan
tool. The odometer and the PRNDL displays will not illuminate. The season
odometer will display if the trip reset switch is pressed, and the IPC
will communicate with the scan tool until the trip reset switch is released. |
| • | DTC B1367 can only be read by the scan tool as a history code
once the fault is removed. |
