Nissan March K13. Instruction — part 260
HO2S2 HEATER
EC-501
< DTC/CIRCUIT DIAGNOSIS >
[HR12DE (TYPE 2)]
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Replace heated oxygen sensor 2.
CAUTION:
• Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.
• Before installing new heated oxygen sensor, clean exhaust system threads using Oxygen Sensor
Thread Cleaner (commercial service tool) and approved Anti-seize Lubricant (commercial service
tool).
>> INSPECTION END
EC-502
< DTC/CIRCUIT DIAGNOSIS >
[HR12DE (TYPE 2)]
IAT SENSOR
IAT SENSOR
Component Function Check
INFOID:0000000005886645
1.
CHECK INTAKE AIR TEMPERATURE SENSOR FUNCTION
1.
Turn ignition switch ON.
2.
Check the voltage between ECM harness connector and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000005886646
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection E38. Refer to Ground Inspection in
XX-XX, "*****"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect manifold absolute pressure (MAP) sensor (with intake air temperature sensor) harness con-
nector.
2.
Turn ignition switch ON.
3.
Check the voltage between manifold absolute pressure (MAP) sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.
CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between manifold absolute pressure (MAP) sensor harness connector and ECM har-
ness connector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK INTAKE AIR TEMPERATURE SENSOR
ECM
Voltage
Connector
Terminal
+
−
F8
46
55
Approx. 0 - 4.8 V
MAF sensor
Ground
Voltage
Connector
Terminal
F4
2
Ground
Approx. 5 V
MAF sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
F4
1
F8
55
Existed
IAT SENSOR
EC-503
< DTC/CIRCUIT DIAGNOSIS >
[HR12DE (TYPE 2)]
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EC-503, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace manifold absolute pressure (MAP) sensor (with intake air temperature sensor).
5.
CHECK INTERMITTENT INCIDENT
Refer to
XX-XX, "*****"
.
>> INSPECTION END
Component Inspection
INFOID:0000000005886647
1.
CHECK INTAKE AIR TEMPERATURE SENSOR
1.
Turn ignition switch OFF.
2.
Disconnect manifold absolute pressure (MAP) sensor harness connector.
3.
Check resistance between manifold absolute pressure (MAP) sensor terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace manifold absolute pressure (MAP) sensor (with intake air temperature sensor).
Terminals
Condition
Resistance
1 and 2
Temperature [
°
C (
°
F)]
25 (77)
1.800 - 2.200 k
Ω
EC-504
< DTC/CIRCUIT DIAGNOSIS >
[HR12DE (TYPE 2)]
IGNITION SIGNAL
IGNITION SIGNAL
Component Function Check
INFOID:0000000006037473
1.
INSPECTION START
Turn ignition switch OFF, and restart engine.
Does the engine start?
YES-1 >> With CONSULT-III: GO TO 2.
YES-2 >> Without CONSULT-III: GO TO 3.
NO
>> Go to
2.
IGNITION SIGNAL FUNCTION
With CONSULT-III
1.
Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-III.
2.
Make sure that each circuit produces a momentary engine speed drop.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
3.
IGNITION SIGNAL FUNCTION
Without CONSULT-III
1.
Let engine idle.
2.
Check the voltage signal between ECM harness connector and ground with an oscilloscope.
NOTE:
The pulse cycle changes depending on rpm at idle.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000006037474
1.
CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
2.
Check the voltage between ECM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Go to
ECM
Voltage signal
Connector
+
−
Terminal
Terminal
F7
17
108
18
21
22
JMBIA0219GB
ECM
Voltage
Connector
+
−
Terminal
Terminal
E16
105
108
Battery voltage
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