GDI ± Troubleshooting
13A-63
INSPECTION PROCEDURE 25
Ignition switch-ST system <M/T>
Probable cause
The ignition switch-ST outputs a HIGH signal to the engine-ECU while the
engine is cranking, and the engine-ECU uses this signal to carry out functions
such as fuel injection control during starting.
D Malfunction of the ignition switch
D Open circuit or short-circuited harness wire
between ignition switch
D Malfunction of the engine-ECU
(2) NG
NG
Repair
OK
Check the ignition switch. (Refer to
GROUP 54.)
NG
Repair
Replace the engine-ECU.
NG
OK
Check the trouble symptoms.
NG
Check the harness wire between the
inhibitor switch and the ignition switch
connector.
NG
Repair
OK
Check the trouble symptoms.
Check the following connector:
C-27
OK
Check the following connector:
C-18
Measure at the engine-ECU connector
C-18.
D Disconnect the connector, and
measure at the harness side.
(1) Voltage between 68 and earth
(Ignition switch: START)
OK: System voltage
(2) Continuity between 67 and earth
OK: Continuity
(1) NG
Check the harness wire between the
engine-ECU connector (terminal
No.91) and the earth, repair if neces-
sary.
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