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POWER SUPPLY AND GROUND CIRCUIT
EC-1525
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
6. CHECK ECM POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Reconnect ECM harness connector.
3. Turn ignition switch ON and then OFF.
4. Check voltage between ECM terminals 119, 120 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 14.
NG (Battery voltage does not exist)>>GO TO 7.
NG (Battery voltage exists for more then a few seconds)>>GO TO 9.
7. CHECK ECM POWER SUPPLY CIRCUIT-III
1. Disconnect ECM relay.
2. Check voltage between relay terminals 1, 3, 6 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.
● Harness connectors E65, F6
● 20A fuse
● Harness for open or short between ECM relay and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
Voltage: After turning ignition switch OFF, battery
voltage will exist for a few seconds, then
drop to approximately 0V.
MBIB0611E
PBIB1899E
Voltage: Battery voltage
PBIB1886E
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