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7-16
FUEL INJECTION SYSTEM
FI
Fault code No.
20
Symptom
A.
Intake air pressure sensor-open or short circuit detected.
B.
Defective values are detected due to the internal malfunction of the
intake air pressure sensor or the Atmospheric pressure sensor.
Diagnostic monitoring
d N
A
03
Intake air pressure sensor
code No.
B
02
03
Atmospheric pressure sensor
Intake air pressure sensor
Order
Item / components
Check or maintenance job
Restore
method
A-1
Connected state of connector
Intake air pressure sensor coupler
Main wiring harness ECU coupler
Sub-wire harness coupler
Check the coupler for any pins that may have
pulled out.
Check the locking condition of the coupler.
If there is a malfunction, repair it and connect it
securely.
Reinstated by
cranking the
engine.
A-2
Open or short circuit in wiring harness
or sub lead.
Repair or replace if there is an open or short
circuit.
Main wiring harness
Black / Blue - Black / Blue
Pink / White - Pink . White
Blue - Blue
Sub lead
Black / Blue - Black / Blue
Pink / White - Pink / White
Blue - Blue
A-3
Defective intake air pressure sensor
Execute the diagnostic monitoring mode.
(Code No. 03)
Replace if defective.
Refer to “FUEL INJECTION SYSTEM” in
chapter 8.
B-1
Defective atmospheric pressure sensor.
Execute the diagnostic monitoring mode.
(Code No. 02)
Replace if defective.
Refer to “FUEL INJECTION SYSTEM” in
chapter 8.
Reinstated by
turning the
main switch
ON.
B-2
Defective intake air pressure sensor
Execute the diagnostic monitoring mode.
(Code No. 03)
Replace if defective.
Refer to “FUEL INJECTION SYSTEM” in
chapter 8.
Reinstated by
cranking the
engine.