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![INFINITI M35 2007 Factory Service Manual EC-568
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DTC P1572 ICC BRAKE SWITCH
Revision: 2007 April2007 M35/M45
DTC Confirmation ProcedureNBS00553
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has b INFINITI M35 2007 Factory Service Manual EC-568
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DTC P1572 ICC BRAKE SWITCH
Revision: 2007 April2007 M35/M45
DTC Confirmation ProcedureNBS00553
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has b](/manual-img/42/57024/w960_57024-2096.png)
EC-568
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DTC P1572 ICC BRAKE SWITCH
Revision: 2007 April2007 M35/M45
DTC Confirmation ProcedureNBS00553
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.
Procedure for malfunction B is not described here. It takes extremely long time to complete procedure for
malfunction B. By performing procedure for malfunction A, the incident that causes malfunction B can be
detected.
TESTING CONDITION:
Steps 4 and 5 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a
road test is expected to be easier, it is unnecessary to lift the vehicle.
WITH CONSULT-II
1. Start engine (VDC switch OFF).
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Press MAIN switch and make sure that CRUISE lamp lights up.
4. Drive the vehicle for at least 5 consecutive seconds under the
following conditions.
If 1st trip DTC is detected, go to EC-570, "
Diagnostic Procedure"
.
If 1st trip DTC is not detected, go to the following step.
5. Drive the vehicle for at least 5 consecutive seconds under the following conditions.
6. If 1st trip DTC is detected, go to EC-570, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
VHCL SPEED SE More than 30 km/h (19 MPH)
Selector lever Suitable position
PBIB2386E
VHCL SPEED SE More than 30 km/h (19 MPH)
Selector lever Suitable position
Driving locationDepress the brake pedal for more than
five seconds so as not to come off from
the above-mentioned vehicle speed.
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DTC P1572 ICC BRAKE SWITCH
EC-569
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Revision: 2007 April2007 M35/M45
Wiring Diagram NBS00554
TBWT0984E
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![INFINITI M35 2007 Factory Service Manual EC-570
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DTC P1572 ICC BRAKE SWITCH
Revision: 2007 April2007 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground te INFINITI M35 2007 Factory Service Manual EC-570
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DTC P1572 ICC BRAKE SWITCH
Revision: 2007 April2007 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground te](/manual-img/42/57024/w960_57024-2098.png)
EC-570
[VQ35DE]
DTC P1572 ICC BRAKE SWITCH
Revision: 2007 April2007 M35/M45
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 ProcedureNBS00555
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.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
101 V/R Stop lamp switch[Ignition switch: OFF]
Brake pedal: Fully releasedApproximately 0V
[Ignition switch: OFF]
Brake pedal: Slightly depressedBATTERY VOLTAGE
(11 - 14V)
108 BR ICC brake switch[Ignition switch: ON]
Brake pedal: Slightly depressedApproximately 0V
[Ignition switch: ON]
Brake pedal: Fully releasedBATTERY VOLTAGE
(11 - 14V)
CONDITION INDICATION
Brake pedal: Slightly depressed OFF
Brake pedal: Fully released ON
SEC011D
CONDITION VOLTAGE
Brake pedal: Slightly depressed Approximately 0V
Brake pedal: Fully released Battery voltage
MBIB0061E
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EC-571
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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 >> GO TO 15.
NG >> GO TO 8.
3. CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ICC brake switch (2) harness connector.
–Stop lamp switch (1)
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 5.
NG >> GO TO 4.
CONDITION INDICATION
Brake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
SEC013D
CONDITION VOLTAGE
Brake pedal: Fully released Approximately 0V
Brake pedal: Slightly depressed Battery voltage
PBIB1537E
PBIB2705E
Voltage: Battery voltage
PBIB0857E
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![INFINITI M35 2007 Factory Service Manual EC-572
[VQ35DE]
DTC P1572 ICC BRAKE SWITCH
Revision: 2007 April2007 M35/M45
4. DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E102
10A fuse
Harness for open or short bet INFINITI M35 2007 Factory Service Manual EC-572
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DTC P1572 ICC BRAKE SWITCH
Revision: 2007 April2007 M35/M45
4. DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E102
10A fuse
Harness for open or short bet](/manual-img/42/57024/w960_57024-2100.png)
EC-572
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DTC P1572 ICC BRAKE SWITCH
Revision: 2007 April2007 M35/M45
4. DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E102
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.
5. 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 switch terminal 2 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 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E108, M15
Harness for open or short between ICC brake switch and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK ICC BRAKE SWITCH
Refer to EC-575, "
Component Inspection" .
OK or NG
OK >> GO TO 15.
NG >> Replace ICC brake switch.
8. CHECK DTC WITH ICC SENSOR INTEGRATED UNIT
Refer to ACS-40, "
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS" .
OK or NG
OK >> GO TO 9.
NG >> Repair or replace.Continuity should exist.
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DTC P1572 ICC BRAKE SWITCH
EC-573
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9. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch (1) harness connector.
–ICC brake switch (2)
3. Disconnect ICC brake hold relay (1) harness connector.
–: Vehicle front
4. Check voltage between stop lamp switch terminal 1 and ground
with CONSULT -II or tester.
5. Check voltage between ICC brake hold relay terminal 3 and
ground with CONSULT -II or tester.
OK or NG
OK >> GO TO 11.
NG >> GO TO 10.
PBIB2705E
PBIB2699E
Voltage: Battery voltage
PBIA9488J
Voltage: Battery voltage
PBIB2740E
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![INFINITI M35 2007 Factory Service Manual EC-574
[VQ35DE]
DTC P1572 ICC BRAKE SWITCH
Revision: 2007 April2007 M35/M45
10. DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E101
10A fuse
Harness for open or short be INFINITI M35 2007 Factory Service Manual EC-574
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DTC P1572 ICC BRAKE SWITCH
Revision: 2007 April2007 M35/M45
10. DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E101
10A fuse
Harness for open or short be](/manual-img/42/57024/w960_57024-2102.png)
EC-574
[VQ35DE]
DTC P1572 ICC BRAKE SWITCH
Revision: 2007 April2007 M35/M45
10. DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E101
10A fuse
Harness for open or short between battery and stop lamp switch
Harness for open or short between battery and ICC brake hold relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
11 . CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between the following;
ECM terminal 101 and stop lamp switch terminal 2,
ECM terminal 101 and ICC brake hold relay terminal 5.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 13.
NG >> GO TO 12.
12. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E108, M15
Harness for open or short between ECM and stop lamp switch
Harness for open or short between ECM and ICC brake hold relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
13. CHECK STOP LAMP SWITCH
Refer to EC-575, "
Component Inspection" .
OK or NG
OK >> GO TO 14.
NG >> Replace stop lamp switch.
14. CHECK ICC BRAKE HOLD RELAY
Refer to EC-575, "
Component Inspection" .
OK >> GO TO 15.
NG >> Replace ICC brake hold relay.
15. CHECK INTERMITTENT INCIDENT
Refer to EC-153, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.
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EC-575
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Component InspectionNBS00556
ICC BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect ICC brake INFINITI M35 2007 Factory Service Manual DTC P1572 ICC BRAKE SWITCH
EC-575
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Component InspectionNBS00556
ICC BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect ICC brake](/manual-img/42/57024/w960_57024-2103.png)
DTC P1572 ICC BRAKE SWITCH
EC-575
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Revision: 2007 April2007 M35/M45
Component InspectionNBS00556
ICC BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect ICC brake switch harness connector.
3. Check continuity between ICC brake switch terminals 1 and 2
under the following conditions.
4. If NG, adjust ICC brake switch installation, refer to BR-6,
"BRAKE PEDAL" , and perform step 3 again.
STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check continuity between stop lamp switch terminals 1 and 2
under the following conditions.
4. If NG, adjust stop lamp switch installation, refer to BR-6,
"BRAKE PEDAL" , and perform step 3 again.
ICC BRAKE HOLD RELAY
1. Check continuity between ICC brake hold relay terminals 3 and
5 under the following conditions.
2. If NG, replace ICC brake hold relay.
Condition Continuity
Brake pedal: Fully released Should exist
Brake pedal: Slightly depressed Should not exist
PBIB1536E
Condition Continuity
Brake pedal: Fully released Should not exist
Brake pedal: Slightly depressed Should exist
PBIA9489J
Condition Continuity
12V direct current supply between terminals
1 and 2Should not exist
No current supply Should exist
PBIB0098E