Infiniti Q45. Manual — part 521
ICC BRAKE SWITCH
EC-723
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
NBS0027P
TBWM1259E
EC-724
ICC BRAKE SWITCH
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 Procedure
NBS0027Q
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
COLOR
ITEM
CONDITION
DATA (DC Voltage)
101
R/W
Stop lamp switch
[Ignition switch: OFF]
●
Brake pedal: Fully released
Approximately 0V
[Ignition switch: OFF]
●
Brake pedal: Slightly depressed
BATTERY VOLTAGE
(11 - 14V)
108
Y/PU
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
When brake pedal: Slightly depress
OFF
When brake pedal: Fully released
ON
SEC011D
CONDITION
VOLTAGE
When brake pedal: Slightly depress
Approximately 0V
When brake pedal: Fully released
Battery voltage
MBIB0061E
ICC BRAKE SWITCH
EC-725
C
D
E
F
G
H
I
J
K
L
M
A
EC
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 13.
3.
CHECK DTC WITH ICC UNIT
Refer to
ACS-43, "TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS"
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace.
CONDITION
INDICATION
When brake pedal: Fully released
OFF
When brake pedal: Slightly depressed
ON
SEC013D
CONDITION
VOLTAGE
When brake pedal: Fully released
Approximately 0V
When brake pedal: Slightly depressed
Battery voltage
PBIB1537E
EC-726
ICC BRAKE SWITCH
4.
CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT-I
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
10.
NG
>> GO TO 5.
5.
CHECK ICC BRAKE SWITCH CIRCUIT-II
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 4 and
ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
PBIB2433E
Voltage: Battery voltage
PBIB0857E
PBIB2427E
Voltage: Battery voltage
MBIB0059E
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