2005 INFINITI FX35 check engine

EC-1204
[VK45DE]
DTC P1147, P1167 HO2S2
Revision: 2005 July 2005 FX
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureABS007SB
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to EC-861, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
74 LG/B Heated oxygen sensor 2
(bank 2) [Engine is running]

Warm-up condition

Revving engine from idle to 3,000 rpm
quickly after the following conditions are met
–After keeping the engine speed between
3,500 and 4,000 rpm for 1 minute and at idle
for 1 minute under no load 0 - Approximately 1.0V
78 B/R Sensor ground
(Heated oxygen sensor) [Engine is running]

Warm-up condition

Idle speed
Approximately 0V
PBIB2195E

DTC P1147, P1167 HO2S2 EC-1207
[VK45DE]
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Revision: 2005 July 2005 FX
5. CHECK HEATED OXYGEN SENSOR 2
Refer to EC-1207, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace malfunctioning heated oxygen sensor 2.
6. CHECK INTERMITTENT INCIDENT
Refer to EC-854, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Component InspectionABS007SC
HEATED OXYGEN SENSOR 2
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 tempera- ture.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)/(B2)” as the monitor item with CONSULT-II.
7. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to ±25%.
“HO2S2 (B1)/(B2)” should be above 0.62V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.48V at least once when the “FUEL INJECTION” is −25%.
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.
SEF174Y
SEF662Y
PBIB1624E

EC-1208
[VK45DE]
DTC P1147, P1167 HO2S2
Revision: 2005 July 2005 FX

Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
Without CONSULT-II
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 voltmeter probes between ECM terminal 55 [HO2S2 (B1) signal] or 74 [HO2S2 (B2) signal] and ground.
6. Check the voltage when revving up to 4,000 rpm under no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.62V at least once during this
procedure.
If the voltage is above 0.62V at step 6, step 7 is not neces-
sary.
7. Keep vehicle at idling for 10 minutes, then check voltage. Or check the voltage when coasting from 80 km/h (50 MPH) in D
position.
The voltage should be below 0.48V at least once during this
procedure.
8. If NG, 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 oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
Removal and InstallationABS007SD
HEATED OXYGEN SENSOR 2
Refer to EM-182, "EXHAUST MANIFOLD AND THREE WAY CATALYST"
PBIB2024E

DTC P1148, P1168 CLOSED LOOP CONTROL EC-1209
[VK45DE]
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Revision: 2005 July 2005 FX
DTC P1148, P1168 CLOSED LOOP CONTROLPFP:22690
On Board Diagnosis LogicABS007SE
These self-diagnoses have the one trip detection logic.
DTC Confirmation Procedure (Up To Serial 400595 Except for Serial 400590)ABS007SF
CAUTION:
Always drive vehicle at a safe speed.
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:

Do not raise engine speed above 3,000 rpm during the DTC Confirmation Procedure. If the engine
speed limit is exceeded, retry the procedure from step 2.

Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Hold engine speed at 2,000 rpm and check one of the following.

“HO2S1 (B1)/(B2)” voltage should go above 0.70V at least
once.

“HO2S1 (B1)/(B2)” voltage should go below 0.21V at least
once.
If the check result is NG, perform EC-1210, "
Diagnostic Pro-
cedure" .
If the check result is OK, perform the following step.
4. Let engine idle at least 5 minutes.
5. Maintain the following condition at least 50 consecutive sec- onds.
During this test, P0132 and/or P0152 may be displayed on CONSULT-II screen.
6. If DTC is detected, go to EC-1210, "
Diagnostic Procedure" .
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1148
11 4 8
(Bank 1) Closed loop control
function The closed loop control function for bank 1
does not operate even when vehicle is driving
in the specified condition.

The heated oxygen sensor 1 circuit is
open or shorted.

Heated oxygen sensor 1

Heated oxygen sensor heater
P1168
11 6 8
(Bank 2) The closed loop control function for bank 2
does not operate even when vehicle is driving
in the specified condition.
B/FUEL SCHDL 4.0 msec or more
ENG SPEED More than 1,300 rpm
Selector lever Suitable position
VHCL SPEED SE More than 70 km/h (43 MPH)
SEC011C

EC-1210
[VK45DE]
DTC P1148, P1168 CLOSED LOOP CONTROL
Revision: 2005 July 2005 FX
DTC Confirmation Procedure (For Serial 400590 and From Serial 400596)ABS00FPN
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 more than 11V 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 normal operating temperature.
3. Turn ignition switch OFF ant wait at least 10 seconds.
4. Start engine and let it idle for at least 2 minutes.
5. If DTC is detected, go to EC-1210, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Overall Function Check (Up To Serial 400595 Except for Serial 400590)ABS007SG
Use this procedure to check the overall function of the closed loop control. During this check, a DTC might not
be confirmed.
WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 16 [HO2S1 (B1) signal] or 35 [HO2S1 (B2) signal] and ground.
3. Check the following with engine speed held at 2,000 rpm con- stant under no load.

The voltage should go above 0.70V at least once.

The voltage should go below 0.21V at least once.
4. If NG, go to EC-1210, "
Diagnostic Procedure" .
Diagnostic ProcedureABS007SH
Perform trouble diagnosis for DTC P0133, P0153. Refer to EC-950, "Diagnostic Procedure" .
SEF174Y
PBIB1528E

DTC P1217 ENGINE OVER TEMPERATURE EC-1215
[VK45DE]
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Revision: 2005 July 2005 FX
Overall Function CheckABS007ST
Use this procedure to check the overall function of the cooling fan. During this check, a DTC might not be con-
firmed.
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pres-
sure fluid escaping from the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up
pressure to escape. Then turn the cap all the way off.
WITH CONSULT-II
1. Check the coolant level in the reservoir tank and radiator. Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-1219,
"Diagnostic Procedure" .
2. Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps and go to EC-1219,
"Diagnostic Procedure" .
3. Turn ignition switch ON.
4. Perform “COOLING FAN” in “ACTIVE TEST” mode with CON- SULT-II.
5. If the results are NG, go to EC-1219, "
Diagnostic Procedure" .
WITH GST
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-1219,
"Diagnostic Procedure" .
2. Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps and go to EC-1219,
"Diagnostic Procedure" .
3. Disconnect engine coolant temperature sensor harness connec- tor.
4. Connect 200 Ω resister to the engine coolant temperature sensor
harness connector.
5. Start engine and make sure that cooling fan operates at middle speed.
Be careful not to overheat engine.
If NG, go to EC-1219, "
Diagnostic Procedure" .
If OK, go to the following step.
6. Turn ignition switch OFF.
7. Disconnect 200 Ω resister from engine coolant temperature sen-
sor harness connector.
SEF621W
SEF646X
SEF621W
PBIB0965E

DTC P1217 ENGINE OVER TEMPERATURE EC-1219
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Revision: 2005 July 2005 FX
Diagnostic ProcedureABS007SV
1. CHECK COOLING FAN (CRANKSHAFT DRIVEN)
1. Start engine and let id idle.
2. Make sure that cooling fan (crankshaft driven) operates normally.
OK or NG
OK (With CONSULT-II)>>GO TO 2.
OK (Without CONSULT-II)>>GO TO 4.
NG >> Check cooling fan (crankshaft driven). Refer to CO-49, "
COOLING FAN" .
2. CHECK COOLING FAN MIDDLE SPEED OPERATION
With CONSULT-II
1. Start engine and let it idle.
2. Select “COOLING FAN” in “ACTIVE TEST” mode with CON- SULT-II, and touch “MID” on the CONSULT-II screen.
3. Make sure that cooling fan operates.
OK or NG
OK >> GO TO 3.
NG >> Check cooling fan middle speed control circuit. (Go to EC-1221, "
PROCEDURE A" .)
3. CHECK COOLING FAN HIGH SPEED OPERATION
With CONSULT-II
1. Select “COOLING FAN” in “ACTIVE TEST” mode with CON- SULT-II and touch “HI” on the CONSULT-II screen.
2. Make sure that cooling fan operates at higher speed than middle speed.
OK or NG
OK >> GO TO 6.
NG >> Check cooling fan high speed control circuit. (Go to EC-
1223, "PROCEDURE B" .)
PBIB1668E
SEF785Z

EC-1220
[VK45DE]
DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2005 July 2005 FX
4. CHECK COOLING FAN MIDDLE SPEED OPERATION
Without CONSULT-II
1. Disconnect engine coolant temperature sensor harness connector.
2. Connect 200 Ω resistor to engine coolant temperature sensor harness connector.
3. Start engine and let it idle.
4. Make sure that cooling fan operates.
OK or NG
OK >> GO TO 5.
NG >> Check cooling fan middle speed control circuit. (Go to
EC-1221, "
PROCEDURE A" .)
5. CHECK COOLING FAN HIGH SPEED OPERATION
Without CONSULT-II
1. Disconnect 200 Ω resister to the engine coolant temperature sensor harness connector.
2. Connect 150 Ω resistor to engine coolant temperature sensor harness connector.
3. Start engine and let it idle.
4. Make sure that cooling fan operates at higher speed than middle speed.
OK or NG
OK >> GO TO 6.
NG >> Check cooling fan control circuit. (Go to EC-1223,
"PROCEDURE B" .)
6. CHECK COOLING SYSTEM FOR LEAK
Apply pressure to the cooling system with a tester, and check if the
pressure drops.
CAUTION:
Higher than the specified pressure may cause radiator damage.
Pressure should not drop.
OK or NG
OK >> GO TO 7.
NG >> Check the following for leak. Refer to CO-37, "
LEAK
CHECK" .

Hose

Radiator

Water pump
PBIB0965E
SEF882V
Testing pressure: 157 kPa (1.6 kg/cm2 , 23 psi)
PBIC1528E