Using EST
Accessing Diagnostic Trouble Codes (DTCs)
NOTE: When opening VIN+ session to fill out form heading, the DTC window automatically appears.
1. Turn the ignition switch to ON.
2. Select Com from the menu bar in the main window, then select Open.
3. Select Code from the menu bar, then View for the
Diagnostic Trouble Code window.
Reading DTCs
ATA code: Codes associated with a Subsystem Identifier (SID), Parameter Identifier (PID), and
Failure Mode Indicator (FMI)
DTC: Diagnostic Trouble Code
Status: Indicates active or inactive DTCs
• Active: With the ignition switch on, active indicates a DTC for a condition currently in the
system. When the ignition switch is turned off, an active DTC becomes inactive. (If a problem
remains, the DTC will be active on the next ignition switch cycle and the EST will display active/inactive.)
• Inactive: With the ignition switch on, inactive indicates a DTC for a condition during a previous ignition switch cycle. When the ignition switch is turned to OFF, inactive DTCs from previous ignition switch on cycles remain in the ECM memory until cleared.
• Active/Inactive: With the ignition switch on, active/inactive indicates a DTC for a condition
currently in the system and was present in a previous ignition switch cycle, if the code was not cleared.
Description:Defines each DTC
1. Select Code from the menu bar, then select Clear.
NOTE: If unable to clear inactive DTCs, be sure Diagnostic Trouble Code window is active by
clicking in the window area.
Using Cruise Switches
Accessing DTCs
NOTE: Read and be familiar with all steps and time limits in this procedure before starting.
1. Set parking brake for the correct signal from the Electronic System Controller (ESC).
2. Turn the ignition switch to ON. (Do not crank the engine.)
3. Press and release the CRUISE ON and RESUME/ACCEL switches at the same time
within 3 seconds of the ignition switch on.
NOTE: There could be as much as a 10 second delay from the time switches are pressed to the time DTCs are flashed.
Reading DTCs
1. The red ENGINE lamp will flash once to indicate the beginning of active DTCs.
2. The amber ENGINE lamp will flash repeatedly, signaling active DTCs.
NOTE: All DTCs are three digits. For DTCs, see Appendix C in this manual or form CGE310-1.
Code 111 indicates that no faults were detected.
3. Count the flashes of the amber ENGINE lamp in sequence. After each digit of the code a short pause will occur.
• Two amber flashes, a pause; three amber flashes, a pause; and two amber flashes and a pause indicate code 232.
4. For more than one DTC, the red ENGINE lamp will flash once indicating the beginning of another active DTC.
5. After all active DTCs have flashed, the red ENGINE lamp will flash twice to indicate the start of inactive DTCs. Count the flashes from the amber ENGINE lamp. If there is more than one inactive code, the red ENGINE lamp will flash once between each DTC.
6. After all DTCs have been sent, the red ENGINE lamp will flash three times indicating end of DTC transmission.
7. To repeat DTC transmission, cycle the ignition switch and press and release the CRUISE ON and RESUME/ACCEL switches, at the same time, within 3 seconds of ignition switch on. The ECM will re-send stored DTCs.
Clearing DTCs
NOTE: Read and be familiar with all steps and time limits in this procedure before starting.
1. Set parking brake for the correct signal from the Electronic System Controller (ESC).
2. Turn the ignition switch to ON. (Do not crank the engine.)
3. Press and hold the CRUISE ON and RESUME/ACCEL switches at the same time.
4. Press and release the accelerator pedal three times within 6 seconds of the ignition switch on.
5. Release the cruise control switches to clear the inactive DTCs.
NOTE: Completing this procedure within 3 seconds of the ignition switch on, without turning the ignition
switch off, will restart DTC transmission to the instrument panel.
