Page 1953 of 4449
![INFINITI FX35 2004 Service Manual EC-612
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2004 November 2004 FX35/FX45
3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn A/C switch and blower switch OFF.
2. Disconnect ref INFINITI FX35 2004 Service Manual EC-612
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2004 November 2004 FX35/FX45
3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn A/C switch and blower switch OFF.
2. Disconnect ref](/manual-img/42/57021/w960_57021-1952.png)
EC-612
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2004 November 2004 FX35/FX45
3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn A/C switch and blower switch OFF.
2. Disconnect refrigerant pressure sensor harness connector.
3. Turn ignition switch ON.
4. Check voltage between refrigerant pressure sensor terminal 1
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E18, F48
Harness for open or short between ECM and refrigerant pressure sensor
>> Repair harness or connectors.
5. CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between refrigerant pressure sensor terminal 3 and ECM terminal 67.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E18, F48
Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB2007E
Voltage: Approximately 5V
PBIB0188E
Continuity should exist.
Page 1954 of 4449
REFRIGERANT PRESSURE SENSOR
EC-613
[VQ35DE]
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Revision: 2004 November 2004 FX35/FX45
7. CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 70 and refrigerant pressure sensor terminal 2.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E18, F48
Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK INTERMITTENT INCIDENT
Refer to EC-135, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationABS006YO
REFRIGERANT PRESSURE SENSOR
Refer to ATC-155, "Removal and Installation of Refrigerant Pressure Sensor" . Continuity should exist.
Page 1955 of 4449
![INFINITI FX35 2004 Service Manual EC-614
[VQ35DE]
ELECTRICAL LOAD SIGNAL
Revision: 2004 November 2004 FX35/FX45
ELECTRICAL LOAD SIGNALPFP:25350
DescriptionABS006YP
The electrical load signal (Headlamp switch signal, etc.) is transferr INFINITI FX35 2004 Service Manual EC-614
[VQ35DE]
ELECTRICAL LOAD SIGNAL
Revision: 2004 November 2004 FX35/FX45
ELECTRICAL LOAD SIGNALPFP:25350
DescriptionABS006YP
The electrical load signal (Headlamp switch signal, etc.) is transferr](/manual-img/42/57021/w960_57021-1954.png)
EC-614
[VQ35DE]
ELECTRICAL LOAD SIGNAL
Revision: 2004 November 2004 FX35/FX45
ELECTRICAL LOAD SIGNALPFP:25350
DescriptionABS006YP
The electrical load signal (Headlamp switch signal, etc.) is transferred through the CAN communication line
from BCM to ECM via IPDM E/R.
CONSULT-II Reference Value in Data Monitor ModeABS006YQ
Specification data are reference values.
Diagnostic ProcedureABS006YR
1. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Connect CONSULT-II and select “DATA MONITOR” mode.
3. Select “LOAD SIGNAL” and check indication under the following
conditions.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
Check “LOAD SIGNAL” indication under the following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 4.
3. CHECK REAR WINDOW DEFOGGER SYSTEM
Refer to GW-86, "
REAR WINDOW DEFOGGER" .
>>INSPECTION END
4. CHECK HEADLAMP SYSTEM
Refer to LT- 7 , "
HEADLAMP - XENON TYPE -" .
>>INSPECTION END
MONITOR ITEM CONDITION SPECIFICATION
LOAD SIGNAL
Ignition switch: ONRear window defogger switch is ON
and/or lighting switch is in 2nd.ON
Rear window defogger switch is OFF
and lighting switch is OFF.OFF
Condition Indication
Rear window defogger switch ON ON
Rear window defogger switch OFF OFF
PBIB0103E
Condition Indication
Lighting switch ON at 2nd position ON
Lighting switch OFF OFF
PBIB0103E
Page 1956 of 4449
ICC BRAKE SWITCH
EC-615
[VQ35DE]
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Revision: 2004 November 2004 FX35/FX45
ICC BRAKE SWITCHPFP:25320
Component DescriptionABS006YS
When the brake pedal is depressed, ICC brake switch is turned OFF
and stop lamp switch is turned ON. ECM detects the state of the
brake pedal by this input of two kinds (ON/OFF signal)
Refer to ACS-6, "
DESCRIPTION" for the ICC function.
CONSULT-II Reference Value in Data Monitor ModeABS006YT
Specification data are reference values.
PBIB1539E
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW1
(ICC brake switch)
Ignition switch: ONBrake pedal: Fully released ON
Brake pedal: Slightly depressed OFF
BRAKE SW2
(stop lamp switch)
Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
Page 1957 of 4449
EC-616
[VQ35DE]
ICC BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS006YU
TBWM0275E
Page 1958 of 4449
![INFINITI FX35 2004 Service Manual ICC BRAKE SWITCH
EC-617
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Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do INFINITI FX35 2004 Service Manual ICC BRAKE SWITCH
EC-617
[VQ35DE]
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Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do](/manual-img/42/57021/w960_57021-1957.png)
ICC BRAKE SWITCH
EC-617
[VQ35DE]
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Revision: 2004 November 2004 FX35/FX45
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 ProcedureABS00DAJ
1. CHECK OVERALL FUNCTION-I
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “BRAKE SW1” in “DATA MONITOR” mode with CON-
SULT-II.
3. Check “BRAKE SW1” indication under the following conditions.
Without CONSULT-II
1. Turn ignition switch “ON”.
2. Check voltage between ECM terminal 108 and ground under the
following conditions.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
101 P/L Stop lamp switch[Ignition switch: OFF]
Brake pedal: Fully releasedApproximately 0V
[Ignition switch: OFF]
Brake pedal: Slightly depressedBATTERY VOLTAGE
(11 - 14V)
108 SB ICC brake switch[Ignition switch: ON]
Brake pedal: Slightly depressedApproximately 0V
[Ignition switch: ON]
Brake pedal: Fully releasedBATTERY VOLTAGE
(11 - 14V)
CONDITION INDICATION
When brake pedal is depressed OFF
When brake pedal is fully released ON
SEC011D
CONDITION VOLTAGE
When brake pedal is depressed Approximately 0V
When brake pedal is fully released Battery voltage
MBIB0061E
Page 1959 of 4449
EC-618
[VQ35DE]
ICC BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
2. CHECK OVERALL FUNCTION-II
With CONSULT-II
Check “BRAKE SW2” indication in “DATA MONITOR” mode.
Without CONSULT-II
Check voltage between ECM terminal 101 and ground under the fol-
lowing conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 12.
3. CHECK DTC WITH ICC UNIT
Refer to ACS-40, "
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace.
CONDITION INDICATION
When brake pedal is released OFF
When brake pedal is depressed ON
SEC013D
CONDITION VOLTAGE
When brake pedal is released Approximately 0V
When brake pedal is depressed Battery voltage
PBIB1537E
Page 1960 of 4449
ICC BRAKE SWITCH
EC-619
[VQ35DE]
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Revision: 2004 November 2004 FX35/FX45
4. CHECK ICC BRAKE SWITCH CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ICC brake hold relay.
3. Turn ignition switch “ON”.
4. Check voltage between ICC brake hold relay terminal 3 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 9.
NG >> GO TO 5.
5. CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ICC brake switch harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between ICC brake switch terminal 1 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
PBIB1531E
Voltage: Battery voltage
PBIB1538E
PBIB1539E
Voltage: Battery voltage
PBIB0857E