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4 CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect power transistor harness connector.
3. Check harness continuity between power transistor terminal 2 and engine ground. Refer to the wiring diagram.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK 䊳 GO TO 5.
NG 䊳 Repair open circuit or short to power in harness or connectors.
5 CHECK INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 1 and power transistor terminal 1.
AEC700
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK 䊳 GO TO 6.
NG 䊳 Repair open circuit or short to ground or short to power in harness or connectors.
IGNITION SIGNAL
KA24DE
Diagnostic Procedure (Cont’d)
EC-563
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
GI
MA
EM
LC
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