Nissan Note [1553/1872] Ec 1553

Nissan Note [1553/1872] Ec 1553
HO2S1
EC-1553
[HR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
3. RETIGHTEN HEATED OXYGEN SENSOR 1
Loosen and retighten heated oxygen sensor 1.
: Vehicle front
Exhaust manifold (2)
>> GO TO 4.
4. CHECK FOR EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (Manifold).
OK or NG
OK >> GO TO 5.
NG >> Repair or replace.
5. CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace.
6. CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 1 harness connector (1).
: Vehicle front
3. Disconnect ECM harness connector.
4. Check harness continuity between ECM terminal 56 and HO2S1
terminal 1.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
Tightening torque: 50 N·m (5.1 kg-m, 37 ft-lb)
PBIB2966E
SEC502D
Continuity should exist.
PBIB2967E

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