General Precautions of EFI System Maintenance
F-87
116. P1651 Malfunction Indicator Lamp (SVS) Circuit Malfunction
Description about Malfunction Cause:
After engine has been started, the circuit voltage of SVS lamp is to be measured by the control module of SVS
lamp circuit inside ECU, and when the voltage complies with the voltage in the mode of circuit malfunction, it
is determined to be the circuit malfunction.
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
P-CODE Present P-CODE Present
P1651
P1651
Maintenance tips:
The malfunction has been confirmed, and
the following problems may possibly exist
1) Circuit connected to Pin 11# of ECU is
open;
2) Circuit connected to Pin 11# of ECU is
short to ground;
3) Circuit connected to Pin 11# of ECU is
short to power supply.
Maintenance tips:
The malfunction is not ultimately confirmed and it may
possibly be a random malfunction. Inspect the following
items:
1) Measure resistance between Pin 11# of ECU and
malfunction lamp;
2) Measure resistance between Pin 11# of ECU and ground;
3) Measure resistance between Pin 11# of ECU and ignition
switch.
Mian relay
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