Infiniti M35/M45 Y50. Manual — part 703
DTC P1572 ICC BRAKE SWITCH
EC-1285
[VK45DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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
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-1288, "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.
EC-1286
[VK45DE]
DTC P1572 ICC BRAKE SWITCH
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
DTC P1572 ICC BRAKE SWITCH
EC-1287
[VK45DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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-1288, "Component Inspection"
.
OK or NG
OK
>> GO TO 14.
NG
>> Replace stop lamp switch.
14.
CHECK ICC BRAKE HOLD RELAY
Refer to
EC-1288, "Component Inspection"
.
OK
>> GO TO 15.
NG
>> Replace ICC brake hold relay.
15.
CHECK INTERMITTENT INCIDENT
Refer to
EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Continuity should exist.
EC-1288
[VK45DE]
DTC P1572 ICC BRAKE SWITCH
Component Inspection
NBS005MU
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
, 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
, 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 2
Should not exist
No current supply
Should exist
PBIB0098E
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