Manual sections
Wiring diagrams- Abbreviations
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Repair manual
Testing & Diagnostics Toyota Avalon XX20
Step-by-step instructions on "Testing & Diagnostics" for Toyota Avalon XX20 (1999–2002). Pick an article — removal, installation, adjustment and diagnostics with illustrations.
5subsections
49articles
218illustrations
Engine Control System Self-Diagnostics
37 articles- Engine Control System Self-Diagnostics: Diagnosis 16
- DTC P0100: MASS AIRFLOW (MAF) METER CIRCUIT
- DTC P0110: INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT
- DTC P0115: ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT
- DTC P0116: ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT RANGE/PERFORMANCE
- DTC P0120: THROTTLE POSITION (TP) SENSOR CIRCUIT
- DTC P0125: INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP FUEL CONTROL
- DTC P0128: THERMOSTAT MALFUNCTION
- DTC P0136: HEATED OXYGEN SENSOR NO. 2 CIRCUIT
- DTC P0141: HEATED OXYGEN SENSOR NO. 2 HEATER CIRCUIT
- DTC P0171 OR P0172: SYSTEM TOO LEAN/RICH
- Engine Control System Self-Diagnostics: Other
- DTC P0325 OR P0330: KNOCK SENSOR NO. 1 OR 2 CIRCUIT
- DTC P0335 OR P1335: CRANKSHAFT POSITION (CKP) SENSOR CIRCUIT
- DTC P0340: CAMSHAFT POSITION (CMP) SENSOR CIRCUIT
- DTC P0420: CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD
- DTC P0440: EVAPORATIVE EMISSION CONTROL SYSTEM, OR DTC P0442: EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED
- DTC P0441: INCORRECT EVAP PURGE FLOW, OR DTC P0446: EVAP VENT CONTROL CIRCUIT
- DTC P0450: EVAP PRESSURE SENSOR CIRCUIT, OR DTC P0451: EVAP PRESSURE SENSOR RANGE/PERFORMANCE
- DTC P0500: VEHICLE SPEED SENSOR CIRCUIT
- DTC P0505: IDLE AIR CONTROL (IAC) SYSTEM CIRCUIT
- DTC P1130 OR P1150: AIR/FUEL SENSOR CIRCUIT RANGE/PERFORMANCE
- DTC P1133 OR P1153: AIR/FUEL SENSOR CIRCUIT RESPONSE
- DTC P1135 OR P1155: AIR/FUEL SENSOR HEATER CIRCUIT
- DTC P1300: IGNITOR NO. 1 CIRCUIT
- DTC P1305: IGNITOR NO. 2 CIRCUIT
- DTC P1310: IGNITOR NO. 3 CIRCUIT
- DTC P1315: IGNITOR NO. 4 CIRCUIT
- DTC P1320: IGNITOR NO. 5 CIRCUIT
- DTC P1325: IGNITOR NO. 6 CIRCUIT
- DTC P1335: CRANKSHAFT POSITION (CKP) SENSOR CIRCUIT
- DTC P1345 OR P1350: VARIABLE VALVE TIMING (VVT) SENSOR CIRCUIT
- DTC P1346 OR P1351: VARIABLE VALVE TIMING (VVT) CIRCUIT RANGE/PERFORMANCE
- DTC P1349 OR P1354: VARIABLE VALVE TIMING (VVT) SYSTEM MALFUNCTION
- DTC P1520: STOPLIGHT SWITCH SIGNAL CIRCUIT (A/T)
- DTC P1600: ECM BATT CIRCUIT
- DTC P1780: PARK/NEUTRAL POSITION (PNP) SWITCH CIRCUIT (A/T ONLY)