Tracker 2WD L4-2.0L VIN C (1999)
Information Bus: Reading and Clearing Diagnostic Trouble Codes
Displaying & Reading Trouble Codes
The procedure for reading Diagnostic Trouble Codes is to use a diagnostic scan tool. Follow the instructions supplied by the scan tool manufacturer in
order to read DTCs accurately.
Using Output Controls With a Scan Tool
Important: Do not use the scan tool's Output Controls feature until the vehicle is at normal operating temperatures. The PCM will not respond to a scan
tool request for Output Controls until the Engine Coolant Temperature is above 80°C (175°F). Failure to wait for normal operating temperatures can
result in the incorrect diagnosis of a driveability problem.
Output Controls are disabled when any DTCs are stored by the PCM. Clear all DTCs before using Output Controls on the scan tool.
The Powertrain Control Module (PCM) can be directed by the Tech 2 scan tool to operate certain solenoids, valves, motors, and switches. This scan tool
function is generally referred to as Output Controls. Output controls can be found under Special Functions on the Tech 2 scan tool. Operating a PCM
controlled device with the scan tool should be limited to a maximum of ten seconds per test period.
Clearing Trouble Codes
Clearing Diagnostic Trouble Codes
Important: Do not clear the DTCs unless directed to do so by the service information provided for each diagnostic procedure. The Freeze Frame data
which may help diagnose an intermittent fault will be erased from the memory when the DTCs are cleared. The PCM will begin to count the warm-up
cycles when the fault that caused the DTC to be stored into memory has been corrected. The DTC will automatically be cleared from the PCM memory
when the PCM has counted forty (40) consecutive warm-up cycles with no further faults detected. Diagnostic trouble codes (DTCs) can be cleared using
a scan tool. In order to clear DTCs, use the scan tool's clear the DTCs or clear the information function. Follow the instructions supplied by the scan tool
manufacturer.
