Scheme 50
The PGM-FI system on this model is a sequential multiport fuel injection system.
Description
The low fuel indicator light turns on when the fuel level is low.
The low fuel indicator light blinks when a problem is detected with the fuel tank pressure sensor or the fuel tank temperature sensor.
Note. If a fuel leak is detected, the fuel pressure regulator shut-off solenoid valve/fuel tank internal solenoid valve will not reopen until the PCM is reset.
Scheme 51
| DTC | Description |
|---|---|
| DTC P0107 | A Low Voltage (High Vacuum) Problem In The Manifold Absolute Pressure (MAP) Sensor |
| DTC P0108 | A High Voltage (Low Vacuum) Problem In The Manifold Absolute Pressure (MAP) Sensor |
| DTC P1128 | Manifold Absolute Pressure (MAP) Lower Than Expected |
| DTC P1129 | Manifold Absolute Pressure (MAP) Higher Than Expected |
| DTC P0112 | A Low Voltage (High Temperature) Problem In The Intake Air Temperature (IAT) Sensor Circuit |
| DTC P0113 | A High Voltage (Low Temperature) Problem In The Intake Air Temperature (IAT) Sensor Circuit |
| DTC P0116 | A Range/Performance Problem In The Engine Coolant Temperature (ECT) Sensor Circuit |
| DTC P0117 | A Low Voltage (High Temperature) Problem In The Engine Coolant Temperature (ECT) Sensor Circuit |
| DTC P0118 | A High Voltage (Low Temperature) Problem In The Engine Coolant Temperature (ECT) Sensor Circuit |
| DTC P0122 | A Low Voltage Problem In The Throttle Position (TP) Sensor Circuit |
| DTC P0123 | A High Voltage Problem In The Throttle Position (TP) Sensor Circuit |
| DTC P1121 | Throttle Position (TP) Lower Than Expected |
| DTC P1122 | Throttle Position (TP) Higher Than Expected |
| DTC P0131 | A Low Voltage Problem In The Primary Heated Oxygen Sensor (HO2S) (Sensor 1) Circuit |
| DTC P0132 | A High Voltage Problem In The Primary Heated Oxygen Sensor (Primary HO2S) (Sensor 1) Circuit |
| DTC P0133 | A Slow Response Problem In The Primary Heated Oxygen Sensor (Primary HO2S) (Sensor 1) Circuit |
| DTC P0137 | A Low Voltage Problem In The Secondary Heated Oxygen Sensor (Secondary HO2S) (Sensor 2) Circuit |
| DTC P0138 | A High Voltage Problem In The Secondary Heated Oxygen Sensor (Secondary HO2S) (Sensor 2) Circuit |
| DTC P0139 | A Slow Response Problem In The Secondary Heated Oxygen Sensor (HO2S) (Sensor 2) Circuit. |
| DTC P0135, P0141 | Heated Oxygen Sensor Heater circuit |
| DTC P0171, P0172 | The Fuel System Is Too Rich/Lean |
| DTC P0191 | A Range/Performance Problem In The Fuel Pressure Circuit |
| DTC P0192 | A Low Voltage (Low Fuel Pressure) Problem In The Fuel Pressure Sensor |
| DTC P0193 | A High Voltage (High Fuel Pressure) Problem In The Fuel Pressure Sensor |
| DTC P0301, P0302, P0303, P0304 | Misfire Detected |
| DTC P0300, P0301, P0302, P0303, P0304 | Random Misfire |
| DTC P0335, P0336, P1361, P1362, P1381, P1382 | CKP Sensor Circuit, TDC Sensor Circuit, CYP Sensor Circuit |
| DTC P0501 | A Range/Performance Problem In The Vehicle Speed Sensor (VSS) Circuit |
| DTC P1106 | A Range/Performance Problem In The Barometric Pressure (Baro) Sensor Circuit |
| DTC P1107, P1108 | A High/Low Voltage Problem In The Baro Sensor Circuit |
| DTC P1182 | A Low Voltage (High Temperature) Problem In The Fuel Temperature Sensor Circuit |
| DTC P1183 | A High Voltage (Low Temperature) Problem In The Fuel Temperature Sensor Circuit |
| DTC P1187 | A Low Voltage (High Temperature) Problem In The Fuel Tank Temperature Sensor Circuit |
| DTC P1188 | A High Voltage (Low Temperature) Problem In The Fuel Tank Temperature Sensor Circuit |
| DTC P1192 | A Low Voltage (Low Fuel Pressure) Problem In The Fuel Tank Pressure Sensor |
| DTC P1193 | A High Voltage (High Fuel Pressure) Problem In The Fuel Tank Pressure Sensor Circuit |
| DTC P1297 | A Low Voltage Problem In The Electrical Load Detector (ELD) Circuit |
| DTC P1298 | A High Voltage Problem In The Electrical Load Detector (ELD) Circuit |
| DTC P1336, P1337 | CKF Sensor Circuit |
| DTC P1359 | A Problem In The Crankshaft Position/Top Dead Center/Cylinder Position (CKP/TDC/CYP) Sensor Circuit |
| DTC P1607 | A PCM Internal Circuit Problem |
DIAGNOSTIC TROUBLE CODES (DTC) LIST
By controlling the air/fuel ratio with a Primary HO2S (Sensor 1) and a Secondary HO2S (Sensor 2), the deterioration of the Primary HO2S (Sensor 1) can be evaluated by its feedback period. When the feedback period of the HO2S exceeds a certain value during stable driving conditions, the sensor will be judged as deteriorated.
When deterioration has been detected during two consecutive trips, the MIL comes on and DTC P0133 will be stored.
Note. If DTC P0131, P0132 and/or P0135 are stored at the same time as DTC P0133, troubleshoot those DTCs first, then troubleshoot DTC P0133.
By monitoring the Long Term Fuel Trim, long term malfunctions in the fuel system will be detected.
If a malfunction has been detected during two consecutive trips, the MIL will come on and DTC P0171 and/or P0172 will be stored.
Note. If some of the DTCs listed below are stored at the same time as DTC P0171 and/or P0172, troubleshoot those DTCs first, then troubleshoot DTC P0171 and/or P0172.
P0107, P0108, P1128-9: MAP Sensor
P0191: Fuel Pressure Sensor
P0135: Primary HO2S Heater
P0137, P0138: Secondary HO2S
P0141: Secondary HO2S Heater
P0401: EGR Flow Insufficient
P1259: VTEC System
P1491: EGR Valve Lift Insufficient
P1498: EGR Valve Lift Sensor High Voltage
Misfire detection is accomplished by monitoring the crankshaft speed with the crankshaft speed fluctuation (CKF) sensor which is attached to the crankshaft.
If misfiring strong enough to damage the catalyst is detected, the MIL will blink during the time of its occurrence, and DTC P0301, P0302, P0303 or P0304 will be stored. Then, after the misfire has ceased, the MIL will come on.
If misfiring that increases emissions is detected during two consecutive driving cycles, the MIL will come on, and DTC P0301, P0302, P0303 or P0304 will be stored.
Note. If some of the DTCs listed below are stored at the same time as a misfire DTC, troubleshoot those DTCs first, then troubleshoot the misfire DTC.
P0131, P0132: HO2S
P0171, P0172: Fuel supply system
P0335, P0336: CKF sensor
P0401, P1491, P1498: EGR system
P1359, P1361, P1362: TDC sensor
P1381, P1382: CYP sensor
Misfire detection is accomplished by monitoring the crankshaft speed with the crankshaft speed fluctuation (CKF) sensor which is attached to the crankshaft.
If misfiring strong enough to damage the catalyst is detected, the MIL will blink during the time of its occurrence, and DTC P0300 and some of DTCs P0301 through P0304 will be stored. Then, after misfire has ceased, the MIL will come on.
If misfiring that increases emissions is detected during two consecutive driving cycles, the MIL will come on, and DTC P0300 and some of DTCs P0301 through P0304 will be stored.
Note. If some of the DTCs listed below are stored at the same time as a misfire DTC. Troubleshoot those DTCs first, then troubleshoot the misfire DTC.
P1128, P01129: MAP sensor
P0131, P0132: HO2S
P0171, P0172: Fuel metering
P0401, P1491, P1498: EGR system
P0505: Idle Control System
P1253: VTEC System
P1361, P1362: TDC sensor
P1381, P1382: CYP sensor
P1508: IAC valve
The CKP Sensor determines timing for fuel injection and ignition of each cylinder and also detects engine speed. The TDC Sensor determines ignition timing at start-up (cranking) and when crank angle is abnormal. The CYP Sensor detects the position of No. 1 cylinder for sequential fuel injection to each cylinder. The CKP/TDC/CYP Sensor is built into the distributor.
Note. If DTC P1359 is stored at the same time as DTC P0335, P0336, P1361, P1362, P1381 and/or P1382, troubleshoot DTC P1359 first, then troubleshoot those DTCs.
Scheme 52
Scheme 53
Scheme 54
Scheme 55
Scheme 56
The diagnostic system has a pulser rotor on the crankshaft and a pulse pick-up sensor on the engine block. The PCM monitors the crankshaft speed fluctuation based on the CKF sensor signal, and judges that an engine misfire occurred if the fluctuation goes beyond a predetermined limit.
