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12 CHECK ECM POWER SUPPLY CIRCUIT-IV
1. Disconnect ECM relay.
SEC003C
2. Check voltage between ECM relay terminal 3 and ground with CONSULT-II or tester.
SEF295X
OK or NG
OK © GO TO 14.
NG © GO TO 13.
13 DETECT MALFUNCTIONING PART
Check the following.
I Joint connector-13
I Harness for open or short between ECM relay and 15A fuse
© Repair open circuit or short to ground or short to power in harness or connectors.
14 CHECK HARNESS CONTINUITY BETWEEN ECM RELAY AND ECM FOR OPEN AND SHORT
1. Check harness continuity between ECM terminals 110, 112 and ECM relay terminal 5.
Refer to WIRING DIAGRAM.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK © GO TO 16.
NG © GO TO 15.
15 DETECT MALFUNCTIONING PART
Check the following.
I Harness connectors E15, F18
I Harness for open or short between ECM and ECM relay
© Repair open circuit or short to ground or short to power in harness or connectors.
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Main Power Supply and Ground Circuit (Cont’d)
EC-150
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