General Precautions of EFI System Maintenance
F-39
Malfunction Diagnostic Guide:
Required Equipment: (Diagnostic Instrument with EOBD Diagnostic Function, Digital Multimeter, and
Correct Circuit Diagram)
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
P0261
P0261
Maintenance tips:
The malfunction has been confirmed, and the
following problems may possibly exist
1) The circuit connected to Pin 27# of ECU short
to ground
Maintenance tips:
The malfunction is not ultimately confirmed and it
may possibly be a random malfunction. Inspect the
following items:
1) The Circuit Connected to Pin 27# of ECU Short
to Ground
48. P0262 1
st
-Cylinder Fuel Injector Circuit Short to Power Supply
Description about Malfunction Cause:
After engine has been started, the circuit voltage is to be measured by the drive module of fuel injector inside
ECU, and when the voltage complies with the voltage in the mode of short to power supply, it is determined to
be the malfunction of short to power supply.
Schematic Circuit:
Malfunction Diagnostic Guide:
Required Equipment: (Diagnostic Instrument with EOBD Diagnostic Function, Digital Multimeter, and
Correct Circuit Diagram)
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
P0262
P0262
Maintenance tips:
The malfunction has been confirmed, and the
following problems may possibly exist
1) The circuit connected to Pin 27# of ECU and the
132 main relay in short circuit
2) The circuit connected to Pin 27# of ECU and
other power supply circuit in short circuit
Maintenance tips:
The malfunction is not ultimately confirmed and it
may possibly be a random malfunction. Inspect the
following items:
1) The circuit connected to Pin 27# of ECU and the
132 main relay in short circuit
2) The circuit connected to Pin 27# of ECU and
other power supply in short circuit.
Main relay
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