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15 DETECT MALFUNCTIONING PART
Check the following.
I Harness connectors F59, F221
I Harness for open and short between ignition coil and harness connector F18
© Repair or replace harness or connectors.
16 CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between ignition coil terminal 2 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK © GO TO 17.
NG © Repair open circuit or short to power in harness or connectors.
17 CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 5, 6, 7, 15, 16, 17 and ignition coil terminal 1. Refer to Wiring Dia-
gram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 18.
NG © Repair open circuit or short to ground or short to power in harness or connectors.
18 CHECK IGNITION COIL WITH POWER TRANSISTOR
Check resistance between ignition coil terminals 2 and 3.
SEF371X
OK or NG
OK © GO TO 19.
NG © Replace ignition coil with power transistor.
19 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-156.
© INSPECTION END
IGNITION SIGNAL
Diagnostic Procedure (Cont’d)
EC-702
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