Nissan Frontier D22. Instruction — part 377
BASIC SERVICE PROCEDURE
EC-611
[VG33E]
C
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EC
12.
CHECK HEATED OXYGEN SENSOR 1 (BANK 1) SIGNAL
With CONSULT-II
1.
See “HO2S1 (B1)” in “DATA MONITOR” mode.
2.
Maintaining engine at 2,000 rpm under no load (engine is
warmed up to normal operating temperature.), check that the
monitor fluctuates between “LEAN” and “RICH” more than 5
times during 10 seconds.
OK or NG
OK >> INSPECTION END.
NG (Monitor does not fluctuate.)>>GO TO 16.
NG (Monitor fluctuates less than 5 times.)>>GO TO 14.
13.
CHECK HEATED OXYGEN SENSOR 1 (BANK 1) SIGNAL
Without CONSULT-II
1.
Set voltmeter probe between ECM terminal 50 and ground.
2.
Make sure that the voltage fluctuates between 0 - 0.3V and 0.6 -
1.0V more than 5 times during 10 seconds at 2,000 rpm.
1 time: 0 - 0.3V
→ 0.6 - 1.0V → 0 - 0.3V
2 times: 0 - 0.3V
→ 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → 0 -
0.3V
OK or NG
OK
>> INSPECTION END.
NG (Voltage does not fluctuate.)>>GO TO 16.
NG (Voltage fluctuates less than 5 times.)>>GO TO 14.
1 time: RICH
→ LEAN → RICH
2 times: RICH
→ LEAN → RICH → LEAN → RICH
PBIB0120E
PBIB2157E
EC-612
[VG33E]
BASIC SERVICE PROCEDURE
14.
CHECK HEATED OXYGEN SENSOR 1 (BANK 1) SIGNAL
With CONSULT-II
1.
Stop engine.
2.
Replace heated oxygen sensor 1 (bank 1).
3.
Start engine and warm it up to normal operating temperature.
4.
Run engine at approx. 2,000 rpm for approx. 2 minutes under no load.
5.
See “HO2S1 MNTR (B1)” in “DATA MONITOR” mode.
6.
Maintaining engine at 2,000 rpm under no-load (engine is
warmed up to normal operating temperature.), check that the
monitor fluctuates between “LEAN” and “RICH” more than 5
times during 10 seconds.
1 time: RICH
→ LEAN → RICH
2 times: RICH
→ LEAN → RICH → LEAN → RICH
Without CONSULT-II
1.
Stop engine.
2.
Replace heated oxygen sensor 1 (bank 1).
3.
Start engine and warm it up to normal operating temperature.
4.
Run engine at approx. 2,000 rpm for approx. 2 minutes under no
load.
5.
Set voltmeter probe between ECM terminal 50 and ground.
6.
Make sure that the voltage fluctuates between 0 - 0.3V and 0.6 -
1.0V more than 5 times during 10 seconds at 2,000 rpm.
1 time: 0 - 0.3V
→ 0.6 - 1.0V → 0 - 0.3V
2 times: 0 - 0.3V
→ 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → 0 -
0.3V
OK or NG
OK
>> INSPECTION END.
NG
>> GO TO 15.
15.
DETECT MALFUNCTIONING PART
Check the following.
1.
Check fuel pressure regulator. Refer to
.
2.
Check mass air flow sensor and its circuit. Refer to
3.
Check injector and its circuit. Refer to
Clean or replace if necessary.
4.
Check engine coolant temperature sensor and its circuit. Refer to
5.
Check ECM function by substituting another known-good ECM.
(ECM may be the cause of an incident, but this is a rare case.)
>> GO TO 2.
PBIB0120E
PBIB2157E
BASIC SERVICE PROCEDURE
EC-613
[VG33E]
C
D
E
F
G
H
I
J
K
L
M
A
EC
16.
CHECK HEATED OXYGEN SENSOR 1 (BANK 1) HARNESS
1.
Stop engine and disconnect battery ground cable.
2.
Disconnect ECM harness connector.
3.
Disconnect heated oxygen sensor 1 (bank 1) harness connector.
4.
Check harness continuity between ECM terminal 50 and heated oxygen sensor 1 (bank 1) harness con-
nector.
OK or NG
OK
>> 1. Connect ECM harness connector.
2. GO TO 18.
NG
>> 1. Repair or replace harness.
2. GO TO 8 (With CONSULT-II).
GO TO 9 (Without CONSULT-II).
17.
CHECK HEATED OXYGEN SENSOR 1 (BANK 2) HARNESS
1.
Stop engine and disconnect battery ground cable.
2.
Disconnect ECM harness connector.
3.
Disconnect heated oxygen sensor 1 (bank 2) harness connector.
4.
Check harness continuity between ECM terminal 51 and heated oxygen sensor 1 (bank 2) harness con-
nector.
OK or NG
OK
>> 1. Connect ECM harness connector.
2. GO TO 18.
NG
>> 1. Repair or replace harness.
2. GO TO 8 (With CONSULT-II).
GO TO 9 (Without CONSULT-II).
Continuity should exist.
Continuity should exist.
EC-614
[VG33E]
BASIC SERVICE PROCEDURE
18.
PREPARATION FOR CO% CHECK
With CONSULT-II
1.
Select “ENG COOLANT TEMP” in “ACTIVE TEST” mode.
2.
Set “ENG COOLANT TEMP” to 5
°C (41°F) by touching “DWN”
and “Qd”.
Without CONSULT-II
1.
Disconnect engine coolant temperature sensor harness connec-
tor.
2.
Connect a resistor (4.4 k
Ω) between terminals of engine coolant
temperature sensor harness connector.
>> GO TO 19.
19.
CHECK CO%
1.
Start engine and warm it up until engine coolant temperature
indicator points to the middle of gauge.
2.
Rev engine (2,000 to 3,000 rpm) two or three times under no-
load, then run engine at idle speed.
3.
Check CO%.
4.
Without CONSULT-II
After checking CO%,
–
Disconnect the resistor from terminals of engine coolant temper-
ature sensor.
–
Connect engine coolant temperature sensor harness connector
to engine coolant temperature sensor.
OK or NG
OK
>> GO TO 10.
NG
>> GO TO 20.
SEF172Y
PBIB1436E
SEF976U
Idle CO: 1.5 - 9.5%
SEF978U
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