DR-1A CODE to DR TEST Chart (Checking for Fault Codes)

Note: The battery must be fully charged and at rated capacity before performing any driveability test procedure.

If the vehicle starts and stalls repeatedly, perform test NS-2A.

If the vehicle stalls when the A/C is turned ON, perform TEST NF-9A.

Connect a scan tool to the underhood diagnostic connector and read fault codes.

If there are "NO FAULTS" present:

1. START the engine and allow the engine to reach normal operating temperature.
2. Run the engine at 2000 rpm manually (do not use the scan tool to raise rpm for this procedure), for at least 10 seconds, then return to idle speed.
3. For automatic transmission equipped vehicles, apply the brakes (parking and service) and shift through all the gears, returning to PARK when finished.
4. Read any fault codes with the scan tool.

If the scan tool still reads "NO FAULTS", check for applicable Technical Service Bulletins and Manual Updates. If an applicable Technical Service Bulletin is found, follow the repair procedures outlined in the bulletin. If driveability problems continue to occur after repairs are done, or there are no applicable bulletins, perform TEST NF-1A.

If the scan tool message is "INTERNAL CONTROLLER FAILURE":

1. Replace the PCM.
2. Perform TEST VER 2.

If the scan tool message is "Engine COLD TOO LONG":

1. Perform the necessary repairs to bring the cooling system into specifications.
2. Perform TEST VER 3.

FAULT CODES AND RELATED TESTS

SCAN TOOL MESSAGE HARD INTERMITTENT
FAULT [1] FAULT [2]

No Change In MAP From START To RUN DR-2A DR-31B
MAP Sensor Voltage Low DR-3A DR-31A
MAP Sensor Voltage High DR-4A DR-31A
No Vehicle Speed Signal DR-5A DR-5A
O2 Sensor Signal Stays At Center DR-6A DR-6A
O2 Sensor Signal Shorted To Voltage DR-7A DR-7A
O2 Signal Stays Above Center DR-8A DR-8A
O2 Signal Stays Below Center DR-9A DR-9A
Coolant Sensor Voltage High DR-10A DR-31A
Coolant Sensor Voltage Low DR-11A DR-31A
TPS Voltage High DR-12A DR-31A
TPS Voltage Low DR-13A DR-31A
Idle Air Control (IAC) Motor Circuits DR-14A DR-32A
Injector #1 Control Circuit DR-15A DR-33A
Injector #2 Control Circuit DR-16A DR-33A
Injector #3 Control Circuit DR-17A DR-33A
Injector #4 Control Circuit DR-18A DR-33A
Injector #5 Control Circuit DR-19A DR-33A
Injector #6 Control Circuit DR-20A DR-33A
Purge Solenoid Circuit DR-21A DR-34A
EGR Solenoid Circuit DR-22A DR-34A
EGR System Failure DR-23A DR-34A
A/C Clutch Relay Circuit DR-24A DR-34A
Radiator Fan Relay Circuit DR-25A DR-34A
No ASD Relay Voltage Sense At Controller DR-26A DR-35A
Ignition Coil #1 Control Circuit DR-27A DR-36A
Ignition Coil #2 Control Circuit DR-28A DR-36A
Ignition Coil #3 Control Circuit DR-29A DR-36A
Controller Failure EMR Miles Not Stored DR-30A DR-30A
Controller Failure EEPROM Write Denied DR-30A DR-30A



Remarks:

[1] Hard Fault - key cycle counter is 0.

[2] Intermittent Fault - key cycle counter is over 0.