Nissan Note [771/1872] Ec 771

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Nissan Note [771/1872] Ec 771
HO2S2
EC-771
[CR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
2. CHECK OVERALL FUNCTION-II
Keep engine at idle for 10 minutes, then check the voltage between ECM terminal 16 and ground, or check
voltage when coasting 80 km/h (50 MPH) in 3rd gear position.
OK or NG
OK >> INSPECTION END
NG >> GO TO 3.
3. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
Refer to EC-548, "
Ground Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace ground connections.
4. CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect heated oxygen sensor 2 harness connector (1).
: Vehicle front
Heated oxygen sensor 2 (2)
Oil pan (3)
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 74 and HO2S2
terminal 4. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
The voltage does not remain in the range of 0.2 - 0.4V
1. Body ground E44 2. Body ground E45 3. Body ground E28
MBIB1502E
Continuity should exist.
MBIB1459E

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