sensor INFINITI FX35 2005 Service Manual

DTC P0550 PSP SENSOR EC-401
[VQ35DE]
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EC
Revision: 2005 July 2005 FX
6. CHECK INTERMITTENT INCIDENT
Refer to EC-163, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Component InspectionABS006SS
POWER STEERING PRESSURE SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and let it idle.
3. Check voltage between ECM terminal 12 and ground under the following conditions.
Removal and InstallationABS00A3Z
POWER STEERING PRESSURE SENSOR
Refer to PS-41, "HYDRAULIC LINE" .
Condition Voltage
Steering wheel: Being turned. 0.5 - 4.5V
Steering wheel: Not being turned. 0.4 - 0.8V
MBIB0126E

DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATER EC-405
[VQ35DE]
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Revision: 2005 July 2005 FX
DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATERPFP:22693
DescriptionABS00A9L
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty control of the air fuel ratio (A/F) sensor 1 heater corresponding to the engine
operating condition to keep the temperature of air fuel ratio (A/F) sensor 1 element at the specified range.
CONSULT-II Reference Value in Data Monitor ModeABS00A9M
Specification data are reference values.
On Board Diagnosis LogicABS00A9N
DTC Confirmation ProcedureABS00A9O
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
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
2. Start engine and let it idle for at least 10 seconds.
3. If 1st trip DTC is detected, go to EC-410, "
Diagnostic Procedure"
.
Sensor Input Signal to ECM ECM function Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS) Engine speed
Air fuel ratio (A/F) sensor 1
heater control Air fuel ratio (A/F) sensor 1 heater
Mass air flow sensor Amount of intake air
MONITOR ITEM CONDITION SPECIFICATION
A/F S1 HTR (B1)
A/F S1 HTR (B2)

Engine: After warming up, idle the engine 0 - 100%
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1031
1031
(Bank 1) Air fuel ratio (A/F) sensor
1 heater control circuit
low The current amperage in the heated air fuel ratio
(A/F) sensor 1 heater circuit is out of the normal
range.
(An excessively low voltage signal is sent to ECM
through the heated air fuel ratio (A/F) sensor 1
heater.)

Harness or connectors
(The air fuel ratio (A/F) sensor 1
heater circuit is open or shorted.)

Air fuel ratio (A/F) sensor 1 heater
P1051
1051
(Bank 2)
P1032
1032
(Bank 1) Air fuel ratio (A/F) sensor
1 heater control circuit
high The current amperage in the heated air fuel ratio
(A/F) sensor 1 heater circuit is out of the normal
range.
(An excessively high voltage signal is sent to ECM
through the heated air fuel ratio (A/F) sensor 1
heater.)

Harness or connectors
(The air fuel ratio (A/F) sensor 1
heater circuit is shorted.)

Air fuel ratio (A/F) sensor 1 heater
P1052
1052
(Bank 2)
SEF058Y

EC-406
[VQ35DE]
DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATER
Revision: 2005 July 2005 FX
WITH GST
Follow the procedure “WITH CONSULT-II” above.

DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATER EC-407
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Revision: 2005 July 2005 FX
Wiring DiagramABS00A9P
BANK 1
TBWM0388E

EC-408
[VQ35DE]
DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATER
Revision: 2005 July 2005 FX
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
TERMI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
2R/L A/F sensor 1 heater
(Bank 1) [Engine is running]

Warm-up condition

Idle speed Approximately 5V
PBIB1584E

DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATER EC-409
[VQ35DE]
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Revision: 2005 July 2005 FX
BANK 2
TBWM0389E

EC-410
[VQ35DE]
DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATER
Revision: 2005 July 2005 FX
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic ProcedureABS00A9Q
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground three screws on the body. Refer to EC-170, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or Replace ground connections.
TERMI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
24 L A/F sensor 1 heater
(Bank 2) [Engine is running]

Warm-up condition

Idle speed Approximately 5V
PBIB1584E
PBIB2625E

DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATER EC-411
[VQ35DE]
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Revision: 2005 July 2005 FX
2. CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect air fuel ratio (A/F) sensor 1 harness connector.
2. Turn ignition switch ON.
3. Check voltage between air fuel ratio sensor 1 terminal 3 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E18, F48

Fuse block (J/B) connector E201

10A fuse

Harness for open or short between air fuel ratio sensor 1 and fuse
>> Repair or replace harness or connectors.
4. CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 2 (bank 1) or 24 (bank 2) and air fuel ratio (A/F) sensor 1 terminal 4.
Refer to Wiring Diagram.
4. Also check harness for short to ground or short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. Voltage: Battery voltage
PBIB2190E
PBIB1683E
Continuity should exist.

EC-412
[VQ35DE]
DTC P1031, P1032, P1051, P1052 A/F SENSOR 1 HEATER
Revision: 2005 July 2005 FX
5. CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER
Refer to EC-412, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace air fuel ratio (A/F) sensor 1.
6. CHECK INTERMITTENT INCIDENT
Perform EC-163, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace air fuel ratio (A/F) sensor 1.
NG >> Repair or replace.
Component InspectionABS00A9R
AIR FUEL RATIO (A/F) SENSOR 1 HEATER
Check resistance between terminals 3 and 4.
Check continuity between terminals 3 and 1, 2, 5, 6, terminals 4 and
1, 2, 5, 6.
If NG, replace the air fuel ratio (A/F) sensor 1.
CAUTION:

Discard any air fuel ratio (A/F) 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 air fuel ratio (A/F) sensor, clean
exhaust system threads using Heated Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12 and approved
anti-seize lubricant.
Removal and InstallationABS00A9S
AIR FUEL RATIO (A/F) SENSOR 1
Refer to EM-26, "EXHAUST MANIFOLD AND THREE WAY CATALYST" .
Resistance: 2.3 - 4.3
Ω [at 25 °C (77 °F)]
Continuity should not exist.
PBIB1684E

EC-422
[VQ35DE]
DTC P1111, P1136 IVT CONTROL SOLENOID VALVE
Revision: 2005 July 2005 FX
2. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E19, F49

Harness connectors F10, F211 (Bank 1)

IPDM E/R harness connector E7

Harness for open or short between intake valve timing control solenoid valve and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR
OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 11 (bank 1) or 10 (bank 2) and intake valve timing con- trol solenoid valve terminal 1. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors F211, F10 (Bank 1)

Harness for open and short between ECM and intake valve timing control solenoid valve
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE
Refer to EC-177, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace intake valve timing control solenoid valve.
6. CHECK INTERMITTENT INCIDENT
Refer to EC-163, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
For wiring diagram, refer to EC-302
for CKP sensor (POS), EC-309 and EC-311 for CMP sensor (PHASE).
>> INSPECTION END
Component InspectionABS00E95
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
1. Disconnect intake valve timing control solenoid valve harness connector. Continuity should exist.