Test Dr-1A - Checking System For Faults

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS at end of article. Battery must be fully charged and at rated capacity before performing any driveability test procedure. If vehicle starts and stalls repeatedly, perform TEST NS-2A . If vehicle stalls when A/C is turned on, perform TEST NF-9A .

Turn ignition on. Connect DRB-II to engine diagnostic connector. Read fault messages. If DRB-II displays fault messages, go to step 4). If DRB-II does not display fault messages, start engine. Allow engine to reach normal operating temperature. Set engine speed manually to 2000 RPM for at least 10 seconds, and return engine to idle.
On A/T models, apply brakes. Shift gear selector through all gears and return to PARK position. Using DRB-II, read fault messages. If no fault messages are displayed, go to next step. If fault messages are displayed, go to step 4).
On all models, check TECHNICAL SERVICE BULLETINS (TSBs) for any pertinent information if DRB-II still displays NO FAULTS. If a TSB exists, perform corrective action. If driveability problem continues after performing TSB procedure or if no TSB information was found, perform TEST NF-1A.
NOTE: ENGINE COLD TOO LONG fault message may set erroneously if ambient temperature is extremely cold.
If fault message is INTERNAL CONTROLLER FAILURE or CONTROLLER FAILURE, replace Single Board Engine Controller (SBEC). Perform VERIFICATION TEST VER-2 . If fault message is ENGINE COLD TOO LONG, check engine cooling system. Repair cooling system as necessary. Perform VERIFICATION TEST VER-3 .
If either of these fault messages are NOT displayed, see DRB-II FAULT MESSAGES - DRIVEABILITY CODES table. Select fault message and corresponding test. Correct all hard fault messages before proceeding to intermittent fault message.