Service manual

FUEL INJECTION SYSTEM
7-62
Fault code No. 62 Symptom Muffler cooling fan temperature sensor: open or short cir-
cuit detected.
Diagnostic code No. 12 Muffler cooling fan temperature sensor
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Installed condition of muffler cooling
fan temperature sensor.
Check for looseness or pinching. Turning the
main switch to
“ON”.
2 Connections
• Muffler cooling fan temperature
sensor coupler
• Main wire harness ECU coupler
• 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.
3 Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between muffler cooling fan
temperature sensor coupler and
ECU coupler.
(black/blue–black/blue)
(brown/yellow–brown/yellow)
4 Defective muffler cooling fan
temperature sensor.
• Execute the diagnostic mode.
(Code No.12)
• Replace if defective.
Refer to “CHECKING THE
MUFFLER COOLING FAN
TEMPERATURE SENSOR” on
page 7-108.