Service manual

FUEL INJECTION SYSTEM
8-65
Fault code No. 42 Symptom
A. No normal signals are received from the speed sen-
sor.
B. Open circuit is detected in the neutral switch.
Diagnostic code No.
A 07 Speed sensor
B 21 Neutral switch
Order
Item/components and probable
cause
Check or maintenance job
Reinstatement
method
A-1
Installed state of speed sensor. • Check for looseness or pinch-
ing.
Starting the
engine, and
activating the
speed sensor
by operating the
vehicle at 20 to
30 km/h.
A-2
Connections
• Speed sensor coupler
• Main wire harness ECU coupler
• Check the couplers for any pins
that may be pulled out.
• Check the locking condition of
the couplers.
• If there is a malfunction, repair it
and connect the coupler
securely.
A-3
Open or short circuit in lead. • Repair or replace if there is an
open or short circuit.
• Between speed sensor coupler
and ECU coupler.
(Blue–Blue)
(White/Yellow–White/Yellow)
(Black/Blue–Black/Blue)
A-4
Defective speed sensor • Execute the diagnostic mode.
(Code No.07)
• Replace if defective.
Refer to "CHECKING THE
SPEED SENSOR" on page 8-
95.