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Toyota Corolla Repair Manual: Oxygen sensor heater control circuit...

Toyota Corolla Repair Manual / Diagnostics / Sfi system / Oxygen sensor heater control circuit...

Dtc p0031 oxygen sensor heater control circuit low (bank 1 sensor 1)

Dtc p0032 oxygen sensor heater control circuit high (bank 1 sensor 1)

Dtc p0037 oxygen sensor heater control circuit low (bank 1 sensor 2)

Dtc p0038 oxygen sensor heater control circuit high (bank 1 sensor 2)

Inspection procedure
Hint: read freeze frame data using the handheld tester or the obd ii scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is usefu ...

Circuit description
Refer to dtc p0130 Hint: the ecm provides a pulse width modulated control circuit to adjust current through the heater. The heated oxygen sensor heater circuit uses a relay on the b+ side of the ...

Other materials:

Overhaul
1. Drain brake fluid Notice: wash the brake fluid off immediately if it comes into contact with any painted surface. 2. Remove air cleaner cap subassy 3. Remove brake master cylinder subassy  disconnect the brake fluid level switch connector from master cylinder reservoir subassy ...

Changing the engine switch positions
1 LOCK The steering wheel is locked and the key can be removed. (Vehicles with an automatic transmission or continuously variable transmission: The key can be removed only when the shift lever is in P.) 2 ACC Some electrical components such as the audio system can be used. 3 ON All ele ...

Precaution
1. Notices when checking  power door lock/unlock function: the wireless remote control function operates only when the following 3 conditions are met.  No key is inserted into the ignition key cylinder.  All the doors are closed. However, doors can be unlocked even wh ...

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