Diagnostic Trouble Code (DTC) Identification
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| Fault Code | Fault Condition |
|---|---|
| 1000 | Ignition circuit low. |
| 1001 | Ignition circuit high. |
| 1004 | ECU battery feed and power grounds. |
| 1005 | System ground circuit. |
| 1006 | EGR solenoid circuit low. |
| 1007 | EGR solenoid circuit high. |
| 1008 | Power steering circuit low. |
| 1009 | Power steering circuit high. |
| 1012 | Fuel injector circuits. |
| 1013 | Ignition module (MPA) circuit high. |
| 1014 | Fuel pump circuit low. |
| 1015 | Fuel pump circuit high. |
| 1016 | Manifold Air Temperature (MAT) circuit low. |
| 1017 | Manifold Air Temperature (MAT) circuit high. |
| 1018 | Serial data circuit (A/T or M/T). |
| 1019 | Power latch not set. |
| 1021 | Engine failed to start. |
| 1022 | Starter relay circuit low. |
| 1024 | ECU start circuit low. |
| 1025 | Wide Open Throttle (WOT) circuit low. |
| 1027 | Throttle Position Sensor (TPS) circuit high. |
| 1028 | Checking TPS calibration. |
| 1029 | Idle Speed Actuator (ISA) closed throttle circuit low. |
| 1030 | Idle Speed Actuator (ISA) closed throttle circuit high. |
| 1031 | ECU closed throttle circuit low. |
| 1032 | ECU closed throttle circuit high. |
| 1033-36 | Idle Speed Actuator (ISA) circuits. |
| 1037 | Throttle Position Sensor (TPS) circuit low. |
| 1038 | Serial data enable circuit high. |
| 1039 | Serial data enable circuit low. |
| 1040 | Power latch relay circuit low. |
| 1041 | Power latch relay circuit high. |
| 1042 | Charging and ECU circuits. |
| 1043 | Shift light circuit low. |
| 1044 | D2-1 circuit low (A/T). |
| 1044 | Upshift light circuit (M/T). |
| 1048 | Checking manual transmission vehicle for correct ECU. |
| 1049 | Checking A/T vehicle configuration. |
| 1050 | Idle RPM low. |
| 1051 | Idle RPM high. |
| 1052 | Manifold Absolute Pressure (MAP) sensor circuits. |
| 1053 | Manifold Absolute Pressure (MAP) sensor ground circuit. |
| 1054 | Coolant sensor and 5-volt supply to TPS/MAP circuit low. |
| 1055 | Coolant sensor circuit high. |
| 1056 | Inactive coolant temperature sensor. |
| 1059 | A/C request circuit low. |
| 1060 | A/C request circuit high. |
| 1061 | A/C select circuit low. |
| 1062 | A/C select circuit high. |
| 1063 | A/C clutch circuit low. |
| 1064 | A/C clutch circuit and power steering input. |
| 1065 | Lean O2 sensor input. |
| 1066 | Rich O2 sensor input. |
| 1067 | Latch relay circuit low. |
| 1068 | Latch relay circuit high. |
| 1069 | Speed sensor and ignition module (MPA) circuits. |
NOTE:
Compare fault code to appropriate diagnostic chart.