2003 NISSAN ALMERA N16 Electronic Repair Manual

CD player auxiliary battery deactivate airbag maintenance open hood jacking points

Page 457 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0031, P0032 HO2S1 HEATER
EC-127
[QG (WITH EURO-OBD)]
C
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EC
Component InspectionEBS00K4N
HEATED OXYGEN SENSOR 1 HEATER
1. Check resistance between HO2S1 terminals as follows.
2

Page 458 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual EC-128
[QG (WITH EURO-OBD)]
DTC P0037, P0038 HO2S2 HEATER
DTC P0037, P0038 HO2S2 HEATER
PFP:226A0
DescriptionEBS00K4P
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen sensor 2 h

EC-128
[QG (WITH EURO-OBD)]
DTC P0037, P0038 HO2S2 HEATER
DTC P0037, P0038 HO2S2 HEATER
PFP:226A0
DescriptionEBS00K4P
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine speed,
amount of intake air and engine coolant temperature.
OPERATION
CONSULT-II Reference Value in Data Monitor ModeEBS00K4Q
Specification data are reference values.
On Board Diagnosis LogicEBS00K4R
DTC Confirmation ProcedureEBS00K4S
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10.5V and 16V at
idle.
WITH CONSULT-II
1. Turn ignition switch “ON” and select “DATA MONITOR” mode with CONSULT-II.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch ″OFF″ and wait at least 10 seconds.
Sensor Input Signal to ECM ECM Function Actuator
Camshaft position sensor (PHASE)
Engine speed
Heated oxygen sensor 2
heater controlHeated oxygen sensor 2 heater Crankshaft position sensor (POS)
Engine coolant temperature sensorEngine coolant tempera-
ture
Mass air flow sensor Amount of intake air
Engine speed rpm Heated oxygen sensor 2 heater
Above 3,800 OFF
●Below 3,800 rpm after the following conditions are met.
●Engine: After warming up
●Keeping the engine speed between 3,500 and 4,000 rpm for
one minute and at idle for one minute under no loadON
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 HTR (B1)
●Engine speed: Below 3,800 rpm after the following conditions are met.
●Engine: After warming up
●Keeping the engine speed between 3,500 and 4,000 rpm for one minute
and at idle for one minute under no loadON
●Engine speed: Above 3,800 rpm OFF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0037
0037Heated oxygen sensor 2
heater control circuit lowThe current amperage in the heated oxygen sensor
2 heater circuit is out of the normal range.
(An excessively low voltage signal is sent to ECM
through the heated oxygen sensor 2 heater.)
●Harness or connectors
(The heated oxygen sensor 2 heater
circuit is open or shorted.)
●Heater oxygen sensor 2 heater
P0038
0038Heated oxygen sensor 2
heater control circuit highThe current amperage in the heated oxygen sensor
2 heater circuit is out of the normal range.
(An excessively high voltage signal is sent to ECM
through the heated oxygen sensor 2 heater.)
●Harness or connectors
(The heated oxygen sensor 2 heater
circuit is shorted.)
●Heater oxygen sensor 2 heater

Page 459 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0037, P0038 HO2S2 HEATER
EC-129
[QG (WITH EURO-OBD)]
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EC
4. Start engine and keep the engine speed between 3,500 and
4,000 rpm for at least one minute under no load

Page 460 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual EC-130
[QG (WITH EURO-OBD)]
DTC P0037, P0038 HO2S2 HEATER
Wiring Diagram
EBS00K4T
YEC284A

Page 461 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0037, P0038 HO2S2 HEATER
EC-131
[QG (WITH EURO-OBD)]
C
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EC
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM g

Page 462 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual EC-132
[QG (WITH EURO-OBD)]
DTC P0037, P0038 HO2S2 HEATER
2. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M182, E251
●Harness connectors E75, F36
●Fuse block (J/B) connect

Page 463 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0037, P0038 HO2S2 HEATER
EC-133
[QG (WITH EURO-OBD)]
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EC
Component InspectionEBS00K4V
HEATED OXYGEN SENSOR 2 HEATER
1. Check resistance between HO2S2 terminals as follows.
2

Page 464 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual EC-134
[QG (WITH EURO-OBD)]
DTC P0102, P0103 MAF SENSOR
DTC P0102, P0103 MAF SENSOR
PFP:22680
Component DescriptionEBS00K4X
The mass air flow sensor is placed in the stream of intake air. It mea-
sure

EC-134
[QG (WITH EURO-OBD)]
DTC P0102, P0103 MAF SENSOR
DTC P0102, P0103 MAF SENSOR
PFP:22680
Component DescriptionEBS00K4X
The mass air flow sensor is placed in the stream of intake air. It mea-
sures the intake flow rate by measuring a part of the entire intake
flow. It consists of a hot film that is supplied with electric current from
the ECM. The temperature of the hot film is controlled by the ECM a
certain amount. The heat generated by the hot film is reduced as the
intake air flows around it. The more air, the greater the heat loss.
Therefore, the ECM must supply more electric current to maintain
the temperature of the hot film as air flow increases. The ECM
detects the air flow by means of this current change.
CONSULT-II Reference Value in Data Monitor ModeEBS00K4Y
Specification data are reference values.
On Board Diagnosis LogicEBS00K4Z
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
SEC266C
MONITOR ITEM CONDITION SPECIFICATION
MAS A/F SE-B1
●Engine: After warming up
●Air conditioner switch: OFF
●Shift lever:
N (A/T models)
Neutral (M/T models)
●No-loadIdle Approx. 1.0 - 1.7V
2,500 rpm Approx. 1.5 - 2.1V
CAL/LD VALUE
●Engine: After warming up
●Shift lever:
N (A/T models)
Neutral (M/T models)
●Air conditioner switch: OFF
●No-loadIdle 10% - 35%
2,500 rpm 10% - 35%
MASS AIRFLOW
●Engine: After warming up
●Shift lever:
N (A/T models)
Neutral (M/T models)
●Air conditioner switch: OFF
●No-loadIdle 1.0 - 4.0 g·m/s
2,500 rpm 5.0 - 10.0 g·m/s
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0102
0102Mass air flow sensor circuit
low inputAn excessively low voltage from the sensor
is sent to ECM when engine is running.
●Harness or connectors
(The sensor circuit is open or shorted.)
●Intake air leaks
●Mass air flow sensor
P0103
0103Mass air flow sensor circuit
high inputAn excessively high voltage from the sensor
is sent to ECM.
●Harness or connectors
(The sensor circuit is open or shorted.)
●Mass air flow sensor
Detected items Engine operating condition in fail-safe mode
Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.

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