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2 CHECK ECM POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF and then ON.
2. Check voltage between ECM terminal 24 and ground with CONSULT-II or tester.
SEF674U
Voltage: Battery voltage
OK or NG
OK 䊳 GO TO 4.
NG 䊳 GO TO 3.
3 DETECT MALFUNCTIONING PART
Check the following.
쐌 Harness connectors E74, M82
쐌 Harness connectors M59, F27
쐌 Fuse block (J/B) connector E49
쐌 10A fuse
쐌 Harness for open or short between ECM and fuse
䊳 Repair harness or connectors.
4 CHECK ECM GROUND CIRCUIT-I 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.
5 DETECT MALFUNCTIONING PART
Check the following.
쐌 Joint connector-2
쐌 Harness for open between ECM and engine ground
䊳 Repair open circuit or short to power in harness or connectors.
TROUBLE DIAGNOSIS FOR POWER SUPPLY
VG33E
Main Power Supply and Ground Circuit (Cont’d)
EC-735
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
GI
MA
EM
LC
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