Toyota Corolla (E120): Idle signal circuit

Dtc 51 idle signal circuit

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Floor shift parking lock cable assy (atm)
Replacement 1. Precaution 2. Disconnect battery negative terminal 3. Place front wheels facing straight ahead 4. Remove horn button assy 5. Remove steering wheel assy sst 09950–50013 (09951–05010, 09952–05010, 09953–05020, 09954–05021) 6. Remove steering column cover 7. Remove c ...

Circuit description
The rear heated oxygen sensor is used to monitor oxygen concentration in the exhaust gas. For optimum catalytic converter operation, the air fuel mixture must be maintained near the ideal ”stoichiometric” ratio. The heated oxygen sensor output voltage changes suddenly in the vicinity of ...

Inspection procedure
Hint: read freeze frame data using the hand-held tester or the obd ii scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the ...