Nissan Note [1572/1872] Diagnostic procedure

Nissan Note [1572/1872] Diagnostic procedure
EC-1572
[HR (WITHOUT EURO-OBD)]
HO2S2 HEATER
Diagnostic Procedure
BBS004SL
1. CHECK OVERALL FUNCTION
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Set tester proves between ECM terminal 5 (HO2S2 heater signal) and ground.
6. Check the voltage under the following conditions.
Verify that the oscilloscope screen shows the signal waves as
shown below.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
2. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
Refer to EC-1342, "
Ground Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace ground connections.
Conditions Voltage
At idle
Approximately 10V
Engine speed is above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
MBIB1395E
PBIA8148J
1. IPDM E/R 2. Body ground 3. Body ground
MBIB1550E

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