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Wiring diagrams Section: Testing & Diagnostics

Engine Control System (Sfi) - Diagnosis: Diagnosis
Engine Control System (Sfi) - Diagnosis: Wiring
DTC P0031: OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT LOW (BANK 1 SENSOR 1), DTC P0032: OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 1), DTC P0051: OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT LOW (BANK 2 SENSOR 1), DTC P0052: OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT HIGH (BANK 2 SENSOR 1)
Engine Control System (Sfi) - Diagnosis: Other
P0441
P0446
P0442, P0456
DTC P2195: OXYGEN (A/F) SENSOR SIGNAL STUCK LEAN (BANK 1 SENSOR 1), DTC P2196: OXYGEN (A/F) SENSOR SIGNAL STUCK RICH (BANK 1 SENSOR 1), DTC P2197: OXYGEN (A/F) SENSOR SIGNAL STUCK LEAN (BANK 2 SENSOR 1), DTC P2198: OXYGEN (A/F) SENSOR SIGNAL STUCK RICH (BANK 2 SENSOR 1)
DTC P2237: OXYGEN SENSOR PUMPING CURRENT CIRCUIT/OPEN (FOR A/F SENSOR)(BANK 1 SENSOR 1), DTC P2238: OXYGEN SENSOR PUMPING CURRENT CIRCUIT LOW (FOR A/F SENSOR)(BANK 1 SENSOR 1), DTC P2239: OXYGEN SENSOR PUMPING CURRENT CIRCUIT HIGH (FOR A/F SENSOR)(BANK 1 SENSOR 1), DTC P2240: OXYGEN SENSOR PUMPING CURRENT CIRCUIT/OPEN (FOR A/F SENSOR)(BANK 2 SENSOR 1), DTC P2241: OXYGEN SENSOR PUMPING CURRENT CIRCUIT LOW (FOR A/F SENSOR)(BANK 2 SENSOR 1), DTC P2242: OXYGEN SENSOR PUMPING CURRENT CIRCUIT HIGH (FOR A/F SENSOR)(BANK 2 SENSOR 1), DTC P2251: OXYGEN SENSOR REFERENCE GROUND CIRCUIT/OPEN (FOR A/F SENSOR)(BANK 1 SENSOR 1), DTC P2252: OXYGEN SENSOR REFERENCE GROUND CIRCUIT LOW (FOR A/F SENSOR)(BANK 1 SENSOR 1), DTC P2253: OXYGEN SENSOR REFERENCE GROUND CIRCUIT HIGH (FOR A/F SENSOR)(BANK 1 SENSOR 1), DTC P2254: OXYGEN SENSOR REFERENCE GROUND CIRCUIT/OPEN (FOR A/F SENSOR)(BANK 2 SENSOR 1), DTC P2255: OXYGEN SENSOR REFERENCE GROUND CIRCUIT LOW (FOR A/F SENSOR)(BANK 2 SENSOR 1), DTC P2256: OXYGEN SENSOR REFERENCE GROUND CIRCUIT HIGH (FOR A/F SENSOR)(BANK 2 SENSOR 1)

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Engine Control System (Sfi) - Diagnosis: Other Toyota Sienna II

Testing & Diagnostics ~254 words

CONFIRMATION DRIVING PATTERN

Connect the hand held tester or the OBD II scan tool to the DLC3.
Record DTC and the freeze frame data.
Use the hand held tester to set the check mode (See «PRE-CHECK»(ref-181959-S37314561872005080800000) ).
Read the value on the misfire counter for each cylinder when idling. If the value is displayed on the misfire counter, skip the following procedure of confirmation driving.
Drive the vehicle several times with the engine speed, load and its surrounding range shown with ENGINE SPD, CALC LOAD in the freeze frame data or MISFIRE RPM, MISFIRE LOAD in the data list. If you have no hand held tester, turn the ignition switch OFF after the symptom is simulated once. Then repeat the simulation process again. NOTE: In order to memorize the DTC of misfire, it is necessary to drive around MISFIRE RPM, MISFIRE LOAD in the data list for the following period of time. Take care not to turn the ignition switch OFF. Turning the ignition switch OFF switches the diagnosis system from check (test) mode to normal mode. So all DTCs, etc., are erased. ENGINE SPEED AND TIMING Engine Speed Time Idling 3 minutes 30 seconds or more 1,000 rpm 3 minutes or more 2,000 rpm 1 minute 30 seconds or more 3,000 rpm 1 minute or more
Check whether there is misfire or not by monitoring DTC and the freeze frame data. After that, record them.
Turn the ignition switch OFF and wait at least 5 seconds.