Accessing and Reading Diagnostic Trouble Codes

DESCRIPTION:

To enter diagnostic mode, proceed as follows:

1. Turn the ignition "ON."

2. Touch the "OFF" and "WARM" buttons on the CRTs climate control page simultaneously and hold until a double beep is heard or you see a page entitled "SERVICE MODE."

NOTE: Operating the vehicle in the "Diagnostic Mode" for extended time periods without the engine running or without a battery charger will cause the battery to run down and possibly relate false diagnostic information, or cause a no start condition. To ensure proper operation, attach a battery charger on "Trickle" charge if vehicle is to be operated in "Diagnostic Mode" without engine running for periods, longer than 1/2 hour.

After "Diagnostic Mode" is entered any "Trouble Codes" stored in computer memory will be displayed. ECM codes will be displayed first. If no ECM trouble codes are stored, the CRT will display a "NO ECM CODES" message for approximately two seconds. All ECM codes will be prefixed with an "E" (i.e.), E013, E014, etc.). For the ECM code assignments, go to ECM TROUBLE CODE CHARTS. The lowest numbered ECM code will be displayed first followed by progressively higher numbered codes present. Codes will be displayed consecutively for two second intervals until the highest code present has been displayed. When all ECM codes have been displayed, BCM codes will be displayed.

The lowest numbered BCM code will be displayed for approximately two seconds. BCM codes accompanied by "Current" indicates the fault still exists. Since the ECM is not capable of making this determination this message does not appear when ECM codes are being displayed. All BCM codes will be prefixed with a "B" (i.e. B110, B111, etc.). For the BCM code assignments, go to BCM TROUBLE CODE CHARTS. Progressively higher numbered BCM codes, if present, will be displayed consecutively for two second intervals until the highest code present has been displayed. If no BCM Trouble Codes are stored "NO BCM CODES" message will be displayed. At any time during the display of ECM or BCM codes, if the "NO" button on the CRT is pressed, the display of codes will be bypassed. At any time during the display of trouble codes, if the "END" or "LEVEL" button is pressed the CRT will exit "Diagnostic Mode" and go back to normal vehicle operation.