FUEL INJECTION SYSTEM
8-63
Fault code No. 21 Symptom Coolant temperature sensor: open or short circuit detect-
ed.
Diagnostic code No. 06 Coolant temperature sensor
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Installed condition of coolant tempera-
ture sensor
Check for looseness or pinching. Turning the
main switch to
“ON”.
2 Connections
• Coolant temperature sensor coupler
• 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 se-
curely.
3 Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between coolant temperature
sensor coupler and ECU cou-
pler.
(black/blue–black/blue)
(green/white–green/white)
4 Defective coolant temperature sensor. • Execute the diagnostic mode.
(Code No.06)
• Replace if defective.
Refer to “CHECKING THE
COOLANT TEMPERATURE
SENSOR” on page 8-167.
To Next Page
Loading...
