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Fault code No.
28
Diagnostic code No.
Order Item/components and probable
cause
1
Installed state of engine temperature
sensor.
2
Connections
• Engine temperature sensor coupler
• Main wire harness ECU coupler
• Sub-wire harness 2 coupler
3
Open or short circuit in wire harness
and/or sub lead.
4
Defective engine temperature sensor. • Execute the diagnostic mode.
Symptom Engine temperature sensor: open or short circuit detect-
ed.
11
Engine temperature sensor
FUEL INJECTION SYSTEM
Check or maintenance job
Check for looseness or pinching. Turning the
• Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler
securely.
• Repair or replace if there is an
open or short circuit.
• Between engine temperature
sensor coupler and ECU
coupler
(brown–brown)
(black–black)
(Code No.11)
• Replace if defective.
Refer to "CHECKING THE
ENGINE TEMPERATURE
SENSOR" on page 7-102.
7-49
Reinstatement
method
main switch to
"ON".
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