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13 CHECK ECM RELAY
1. Apply 12V direct current between relay terminals 1 and 2.
2. Check continuity between relay terminals 3 and 5.
SEF039W
12V (1 - 2) applied: Continuity exists.
No voltage applied: No continuity
OK or NG
OK 䊳 GO TO 14.
NG 䊳 Replace ECM relay.
14 CHECK ECM GROUND CIRCUIT-II FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 10, 19, 25, 32, 116, 124 and engine ground.
Refer to WIRING DIAGRAM.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK 䊳 GO TO 15.
NG 䊳 GO TO 5.
15 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-732.
䊳 INSPECTION END
TROUBLE DIAGNOSIS FOR POWER SUPPLY
VG33E
Main Power Supply and Ground Circuit (Cont’d)
EC-738
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