Mazda 323 1988 Workshop Manual page 290

4B
TROUBLESHOOTING WITH SST
No. 12 Code Illumination (Throttle Sensor)
Are there any poor connections at throttle sensor
CO""&O,S?
Repair c or replace connector the terminal
Is the resistance of the throttle sensor O.K?
Replace the throttle sensor
(Refer to paws 48-80)
I
Is there 4.5--5.W at the (1C) terminal of the
throttle 'sensor connector?
(Refer to page 48-76)
YES
No PC:
- Open or short circuit in the wiring harness from the
(IC) terminal to the throttle senser to engine control
unit.
Engine control unit defective
More than
Measure (ZG) terminal voltage of the engine con-
-14.5v
p(-.:
trol unit (Refer to page 48-77) Own circuit in the wirino harness from i1A) terminal
l-----
of throttle sensor to engk control unit
in the wiring harness of gound
Lass than 025V PC: Short circuit in the wiring harness from (IA) ter-
minal of throttle sensor to engine control unit.
0.25-4.5V
PC: Engine control unit defective
48-18