Savana 3/4 Ton Van V6-4.3L VIN W (1998)
3. Turn the ignition OFF.
NOTE: Some diagnostic tests will only run one time during an ignition cycle. Some diagnostic test run continuously. Some of the diagnostic test may
start to run, and stop. Some diagnostic tests may not run within the ignition cycle.
Warm-Up Cycle
A warm-up cycle consist of the following:
^
An engine start-up.
^
An increase in engine coolant temperature (ECT) of more than 104°C (40°F) above start-up engine coolant temperature.
^
A minimum ECT of 320°C (160°F). Certain diagnostic test will not run if these conditions are not met during an ignition cycle.
Freeze Frame/Failure Records
If the control module turns the MIL ON because a DTC is set. the following information is stored in the scan tool and displayed in the Freeze
Frame/Failure Records data list.
^
The DTC that caused the MIL to be turned ON.
^
The engine speed (RPM) at the time the DTC set.
^
The Engine Coolant Temperature (ECT) at the time the DTC set.
^
The Manifold Absolute Pressure (MAP) at the time the DTC set.
^
The Short Term (ST) Fuel Trim for Bank 1 at the time the DTC set.
^
The Long Term (LT) Fuel Trim for Bank 1 at the time the DTC set.
^
The Short Term (ST) Fuel Trim for Bank 2 at the time the DTC set.
^
The Long Term (LT) Fuel Trim for Bank 2 at the time the DTC set.
^
The Loop Status at the time the DTC set.
^
The Engine Load at the time the DTC set.
^
The Mass Air Flow (MAF) at the time the DTC set.
^
The Vehicle Speed at the time the DTC set.
^
The Mileage Since First Failure.
^
The Mileage Since MIL Request.
This information will remain stored in the control module until the following occurs:
^
A misfire DTC is set, and that information is stored.
^
A fuel trim DTC is set, and that information is stored.
^
The DTC information is cleared.
Reading Diagnostic Trouble Codes (DTC)S
Use a scan tool in order to read Diagnostic Trouble Codes (DTC)s. Failure to follow this procedure will result in unnecessary repairs.
Clearing Diagnostic Trouble Codes (DTC)S
NOTICE: Turn off the ignition key when disconnecting or reconnecting battery power in order to prevent system damage.
IMPORTANT: Disconnecting the negative battery will result in the loss of other on-board memory data, such as preset radio tuning.
Diagnostic Trouble Codes (DTC)s will be cleared by one of the following ways:
^
Use a scan tool by following the instructions supplied by the manufacturer.
