2004 INFINITI FX35 brake

DTC P1805 BRAKE SWITCH
EC-553
[VQ35DE]
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Revision: 2004 November 2004 FX35/FX45
3. DETECT MALFUNCTIONING PART
Check the following.

10A fuse

Fuse block (J/B) connector E201

Joint connector-2

Harness for open and short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect stop lamp switch harness connector.
4. Check harness continuity between ECM terminal 101 and stop
lamp switch terminal 2.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E211, M41

Joint connector-2

Harness for open or short between ECM and stop lamp switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
6. CHECK STOP LAMP SWITCH
Refer to EC-554, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace stop lamp switch.
7. CHECK INTERMITTENT INCIDENT
Refer to EC-135, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.
PBIB1605E

EC-554
[VQ35DE]
DTC P1805 BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
Component InspectionABS006X7
STOP LAMP SWITCH
1. Disconnect stop lamp switch harness connector.
2. Check continuity between stop lamp switch terminals 1 and 2
under the following conditions.
3. If NG, adjust stop lamp switch installation, refer to BR-6, "
BRAKE PEDAL" , and perform step 2 again.
PBIB1605E
Conditions Continuity
Brake pedal is fully released Should not exist.
Brake pedal is slightly depressed Should exist.
PBIB1185E

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: ON
Brake pedal: Fully released ON

Brake pedal: Slightly depressed OFF
BRAKE SW2
(stop lamp switch)

Ignition switch: ON
Brake pedal: Fully released OFF

Brake pedal: Slightly depressed ON

EC-616
[VQ35DE]
ICC BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS006YU
TBWM0275E

ICC BRAKE SWITCH
EC-617
[VQ35DE]
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EC
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

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

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

EC-620
[VQ35DE]
ICC BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
6. DETECT MALFUNCTIONING PART
Check the following.

Fuse block (J/B) connector E201

10A fuse

Harness for open or short between ICC brake switch and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch “OFF”.
2. Check harness continuity between ICC brake hold relay terminal 3 and ICC brake switch terminal 2.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK ICC BRAKE SWITCH
Refer to EC-1301, "
Component Inspection" .
OK or NG
OK >> GO TO 17.
NG >> Replace ICC brake switch.
9. CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ICC brake hold relay terminal 4 and ECM terminal 108.
Refer Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> GO TO 10.
10. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E211, M41

Harness for open or short between ICC brake hold relay and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
11 . CHECK ICC BRAKE HOLD RELAY
Refer to EC-1301, "
Component Inspection" .
OK >> GO TO 17.
NG >> Replace ICC brake fold relay.Continuity should exist.
Continuity should exist.