B1543

CIRCUIT DESCRIPTION
The instrument panel cluster (IPC) detects high resistance with low engine oil temperature, and low resistance with high engine oil temperature. The instrument panel cluster monitors the oil temperature sensor signal circuit to determine engine oil temperature. The IPC measures the reference voltage change and displays the calculated value on the gage.

CONDITIONS FOR SETTING THE DTC
^ The IPC detects that the oil temperature is less than -10°C (14°F)
^ The engine must be running for longer than 5 minutes for this DTC to set.

ACTION TAKEN WHEN THE DTC SETS
^ The IPC stores DTC B1543.
^ The IPC displays oil temperature on the gage as LOW.

CONDITIONS FOR CLEARING THE DTC A
^ The IPC detects that the oil temperature is above -10°C (14°F).
^ A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.
^ The code is cleared using on-board diagnostics.
^ The IPC receives a clear code command from the scan tool.

TEST DESCRIPTION

Steps 1-10:

The numbers below refer to the step numbers on the diagnostic table.
2. Tests the oil temperature normal operating range data using a scan tool.