General Precautions of EFI System Maintenance
F-36
44. P0221 Electronic Throttle Opening Sensor 2 Signal Irrational
Description about Malfunction Cause:
The system performs continuous monitoring over the signal circuit voltage of the throttle opening sensor, and
when the voltage exceeds the normal voltage range, it is determined to be the malfunction of signal irrational.
Malfunction Diagnostic Guide:
Required Equipment: (Diagnostic Instrument with EOBD Diagnostic Function)
Step I: Use diagnostic instrument to read the malfunction information
Read Result I Read Result II
MIL Lamp On P-CODE Present MIL Lamp Off P-CODE Present
P0221
P0221
Maintenance tips:
The malfunction has been confirmed, and the
following problems may possibly exist
1) Throttle opening sensor 2 damaged;
2) Electronic throttle opening sensor 2 connected to
other circuit.
Maintenance tips:
The malfunction has not been finally confirmed.
Please wait for system to fulfill diagnosis.。
45. P0222 Signal Circuit Voltage of Electronic Throttle Opening Sensor 2 Too Low
(Malfunction of Circuit Short to Ground)
Description about Malfunction Cause:
The system performs continuous monitoring over the signal circuit voltage of the throttle opening sensor, and
when the voltage complies with the voltage in the mode of short to ground, it is determined to be the
malfunction of short to ground.
Schematic Circuit:
5V power supply
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