General Precautions of EFI System Maintenance
F-7
3. P0010: Malfunction of Air Intake VVT Open Circuit
P2088: Malfunction of Air Intake VVT Short Circuit to Ground
P2089: Malfunction of Air Intake VVT Short Circuit to Power Supply
Schematic Circuit:
Malfunction Diagnostic Guide:
Required Equipment: (Diagnostic Instrument with EOBD Diagnostic Function, Digital Multimeter, and
Correct Circuit Diagram)
Description about Malfunction Cause: It is VVT circuit malfunction, which is commonly caused by
VVT’s open circuit, short circuit to ground or short circuit to power supply.
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
P2088, P2089 P0010, P2088, P2089 P2088, P2089 P0010, P2088, P2089
Maintenance tips:
Circuit malfunction
Maintenance tips:
1. Please check wire harness between VVT and ECU
Pin 48# for open circuit, short circuit to ground or
short circuit to power supply;
2. Unstable idling speed or rough running of engine
may appear.
4. P0012: Improper Block Position of Air Intake VVT
Malfunction Diagnostic Guide:
Required Equipment: (Diagnostic Instrument with EOBD Diagnostic Function, Digital Multimeter, and
Correct Circuit Diagram)
Description about Malfunction Cause: VVT is jammed at certain position of large opening and cannot
return to the block position.
Main relay
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