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Test Dr-1A - Checking System For Faults

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For appropriate 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.
  1. Read fault messages using DRB-II. If no fault messages are displayed, go to next step. If DRB-II displays fault messages, go to step 5).
  2. Start engine. Allow engine to reach normal operating temperature. Set engine speed manually to 2000 RPM for at least 10 seconds, and then return vehicle to idle. On A/T models, go to next step. On M/T models, go to step 4).
  3. 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 5).
  4. On all models, check TECHNICAL SERVICE BULLETINS (TSBs) for any pertinent information relating to driveability problems 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.
  5. If fault message is INTERNAL CONTROLLER FAILURE or CONTROLLER FAILURE SPI COMMUNICATIONS, replace Single Board Engine Controller (SBEC). Perform VERIFICATION PROCEDURE VER-2. If fault message is not INTERNAL CONTROLLER FAILURE or CONTROLLER FAILURE SPI COMMUNICATIONS, go to next step.
    NOTE: ENGINE COLD TOO LONG fault message may set erroneously if ambient temperature is extremely cold.
  6. If fault message is ENGINE COLD TOO LONG, check engine cooling system. Repair as required. Perform VERIFICATION PROCEDURE VER-3. If fault message is not ENGINE COLD TOO LONG, go to next step.
  7. Using DRB-II FAULT MESSAGES table, select fault message and corresponding test. Correct all hard fault messages before proceeding to intermittent fault messages.
DRB-II FAULT MESSAGES

DRB-II Message (1) Hard Fault (2) Intermittent Fault
A/C CLUTCH RELAY CIRCUIT DR-25A  DR-37A 
AUTO SHUTDOWN (ASD) RELAY CONTROL CIRCUIT DR-31A  DR-37A 
AUTOMATIC IDLE SPEED MOTOR CIRCUITS DR-17A  DR-35A 
CHARGE TEMP SENSOR VOLTAGE HIGH DR-13A  DR-34A 
CHARGE TEMP SENSOR VOLTAGE LOW DR-14A  DR-34A 
CONTROLLER FAILURE EEPROM WRITE DENIED DR-33A  DR-33A 
COOLANT SENSOR VOLTAGE TOO HIGH DR-11A  DR-34A 
COOLANT SENSOR VOLTAGE TOO LOW DR-12A  DR-34A 
EGR SOLENOID CIRCUIT DR-24A  DR-37A 
IGNITION COIL NO. 1 PRIMARY CKT DR-28A  DR-38A 
IGNITION COIL NO. 2 PRIMARY CKT DR-29A  DR-38A 
IGNITION COIL NO. 3 PRIMARY CKT DR-30A  DR-38A 
INJECTOR NO. 1 CONTROL CIRCUIT & PEAK CURRENT NOT REACHED DR-21A  DR-36A 
INJECTOR NO. 2 CONTROL CIRCUIT & PEAK CURRENT NOT REACHED DR-22A  DR-36A 
INJECTOR NO. 3 CONTROL CIRCUIT & PEAK CURRENT NOT REACHED DR-23A  DR-36A 
INJECTOR NO. 1 PEAK CURRENT NOT REACHED DR-18A  DR-36A 
INJECTOR NO. 2 PEAK CURRENT NOT REACHED DR-19A  DR-36A 
INJECTOR NO. 3 PEAK CURRENT NOT REACHED DR-20A  DR-36A 
MAP VOLTAGE TOO HIGH DR-5A  DR-34A 
MAP VOLTAGE TOO LOW DR-4A  DR-34A 
NO ASD RELAY VOLTAGE SENSE AT CONTROLLER DR-27A  DR-37A 
NO CHANGE IN MAP FROM START TO RUN DR-3A  DR-34B 
NO VEHICLE SPEED SIGNAL DR-6A  DR-6A 
NO SYNC (CAM) SIGNAL AT SBEC DR-32A  DR-34A 
O2 SIGNAL SHORTED TO VOLTAGE DR-8A  DR-8A 
O2 SIGNAL STAYS ABOVE CENTER (RICH) DR-9A  DR-9A 
O2 SIGNAL STAYS BELOW CENTER (LEAN) DR-10A  DR-10A 
O2 SIGNAL STAYS AT CENTER DR-7A  DR-7A 
RADIATOR FAN RELAY CIRCUIT DR-26A  DR-37A 
SLOW CHANGE IN IDLE MAP SIGNAL DR-2A  DR-34B 
THROTTLE POSITION SENSOR VOLTAGE HIGH DR-15A  DR-34A 
THROTTLE POSITION SENSOR VOLTAGE LOW DR-16A  DR-34A 
(1) Key counter is "0".
(2) Key counter is more than "0".
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