Infiniti FX35 / FX45. Manual — part 451
ICC BRAKE SWITCH
EC-565
< SERVICE INFORMATION >
[VQ35DE]
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Diagnosis Procedure
INFOID:0000000001326453
1.
CHECK OVERALL FUNCTION
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.
3.
Check “BRAKE SW1” indication under the following conditions.
Without CONSULT-III
1.
Turn ignition switch ON.
2.
Check voltage between ECM terminal 108 and ground under the
following conditions.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
2.
CHECK DTC WITH ICC UNIT
.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace.
3.
CHECK ICC BRAKE SWITCH CIRCUIT
1.
Turn ignition switch OFF.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
101
P/L
Stop lamp switch
[Ignition switch: OFF]
• Brake pedal: Fully released
Approximately 0V
[Ignition switch: OFF]
• Brake pedal: Slightly depressed
BATTERY VOLTAGE
(11 - 14V)
108
SB
ICC brake switch
[Ignition switch: ON]
• Brake pedal: Slightly depressed
Approximately 0V
[Ignition switch: ON]
• Brake pedal: Fully released
BATTERY VOLTAGE
(11 - 14V)
CONDITION
INDICATION
Brake pedal: Slightly depressed
OFF
Brake pedal: Fully released
ON
CONDITION
VOLTAGE
Brake pedal: Slightly depressed
Approximately 0V
Brake pedal: Fully released
Battery voltage
MBIB0061E
EC-566
< SERVICE INFORMATION >
[VQ35DE]
ICC BRAKE SWITCH
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-III or tester.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 4.
4.
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-III or tester.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
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.
PBIB1531E
Voltage: Battery voltage
PBIB1538E
PBIB1539E
Voltage: Battery voltage
PBIB0857E
ICC BRAKE SWITCH
EC-567
< SERVICE INFORMATION >
[VQ35DE]
C
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EC
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6.
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 7.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK ICC BRAKE SWITCH
EC-567, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> Replace ICC brake switch.
8.
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 10.
NG
>> GO TO 9.
9.
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.
10.
CHECK ICC BRAKE HOLD RELAY
EC-567, "Component Inspection"
OK
>> GO TO 11.
NG
>> Replace ICC brake fold relay.
11.
CHECK INTERMITTENT INCIDENT
>> INSPECTION END
Component Inspection
INFOID:0000000001326454
ICC BRAKE SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect ICC brake switch harness connector.
Continuity should exist.
Continuity should exist.
EC-568
< SERVICE INFORMATION >
[VQ35DE]
ICC BRAKE SWITCH
3.
Check continuity between ICC brake switch terminals 1 and 2
under the following conditions.
If NG, adjust ICC brake switch installation, refer to
, and
perform step 3 again.
ICC BRAKE HOLD RELAY
1.
Apply 12V direct current between ICC brake hold relay terminals 1 and 2.
2.
Check continuity between relay terminals 3 and 4, 6 and 7 under
the following conditions.
3.
If NG, replace ICC brake hold relay.
Condition
Continuity
Brake pedal: Fully released
Should exist.
Brake pedal: Slightly depressed
Should not exist.
SEC023D
Condition
Between terminals
Continuity
12V direct current supply
between terminals 1 and 2
3 and 4
Should not exist.
6 and 7
Should exist.
No current supply
3 and 4
Should exist.
6 and 7
Should not exist.
MBIB0063E
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