Infiniti EX35. Manual — part 1521
WT-40
< COMPONENT DIAGNOSIS >
TIRE PRESSURE WARNING CHECK SWITCH
YES
>> Repair or replace BCM circuit. Replace BCM. Refer to
BCS-84, "Removal and Installation"
.
NO
>> GO TO 2.
2.
CHECK TIRE PRESSURE WARNING CHECK SWITCH CIRCUIT
1.
Turn the ignition switch OFF.
2.
Disconnect BCM harness connector
3.
Check continuity between BCM harness connector and tire pressure warning check switch connector.
4.
Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK BCM
Check BCM input/output signal. Refer to
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Check BCM pin terminals for damage or loose connection with harness connector. If any items
are damaged, repair or replace damaged parts. Replace BCM. Refer to
BCM
Tire pressure warning check switch
Continuity
Connector
Terminal
Connector
Terminal
Existed
M123
149
M23
1
BCM
—
Continuity
Connector
Terminal
M123
149
Ground
Not existed
LOW TIRE PRESSURE WARNING LAMP
WT-41
< COMPONENT DIAGNOSIS >
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LOW TIRE PRESSURE WARNING LAMP
Description
INFOID:0000000003579744
The combination meter receives tire pressure status from the unified
meter and A/C amp. via CAN communication.
When BCM judges from a transmitter signal that tire pressure is
insufficient, BCM transmits a signal to unified meter and A/C amp.
via CAN communication. unified meter and A/C amp. turns on the
low tire pressure warning lamp mounted on the combination meter.
NOTE: Standard air pressure is for 230 kPa (2.3 kg/cm
2
, 33 psi) vehicles.
Component Function Check
INFOID:0000000003579745
1.
CHECK LOW TIRE PRESSURE WARNING LAMP
Check if low tire pressure warning lamp blinks for 1 second and then goes off after turning the ignition switch
ON.
Is inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to diagnosis procedure. Refer to
Diagnosis Procedure
INFOID:0000000003579746
1.
CHECK SELF DIAGNOSTIC RESULTS
Perform self-diagnosis of tire pressure monitoring system.
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Check the DTC.
2.
CHECK LOW TIRE PRESSURE WARNING LAMP
Check if low tire pressure warning lamp blinks 1 second and then goes off after turning the ignition switch ON.
Is inspection result normal?
YES
>> INSPECTION END
NO
>> Check combination meter.
SEIA0434E
Condition
Low tire pressure warning lamp
Ignition switch OFF
OFF
Ignition switch ON
Warning lamp turns on for 1second, then turns off.
Less than 182.7 kPa (1.9 kg/cm
2
, 26 psi) [NOTE]
ON
Tire pressure monitoring system malfunction [Other diagnostic item]
Warning lamp blinks 1 min, then turns on.
WT-42
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
BCM (BODY CONTROL MODULE)
BCM (BODY CONTROL MODULE) : Diagnosis Procedure
INFOID:0000000003773753
1.
CHECK FUSE AND FUSIBLE LINK
Check that the following fuse and fusible link are not blown.
Is the fuse fusing?
YES
>> Replace the blown fuse or fusible link after repairing the affected circuit if a fuse or fusible link is
blown.
NO
>> GO TO 2.
2.
CHECK POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect BCM connectors.
3.
Check voltage between BCM harness connector and ground.
Is the measurement value normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
Does continuity exist?
YES
>> INSPECTION END
NO
>> Repair harness or connector.
UNIFIED METER AND A/C AMP.
UNIFIED METER AND A/C AMP. : Diagnosis Procedure
INFOID:0000000003773754
1.
CHECK FUSE
Check for blown fuses.
Signal name
Fuse and fusible link No.
Battery power supply
K
10
Terminals
Voltage
(Approx.)
(+)
(
−
)
BCM
Ground
Connector
Terminal
M118
1
Battery voltage
M119
11
BCM
Ground
Continuity
Connector
Terminal
M119
13
Existed
Power source
Fuse No.
Battery
6
Ignition switch ACC or ON
19
Ignition switch ON or START
3
POWER SUPPLY AND GROUND CIRCUIT
WT-43
< COMPONENT DIAGNOSIS >
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Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Be sure to eliminate cause of malfunction before installing new fuse.
2.
CHECK POWER SUPPLY CIRCUIT
Check voltage between unified meter and A/C amp. harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Check harness between unified meter and A/C amp. and fuse.
3.
CHECK GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect unified meter and A/C amp. connector.
3.
Check continuity between unified meter and A/C amp. harness connector and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair harness or connector.
Terminals
Ignition switch position
Value (Approx.)
(+)
(-)
Unified meter A/C amp.
Terminal
Signal name
M67
54
Battery power supply
Ground
OFF
Battery voltage
41
ACC power supply
ACC
Battery voltage
53
Ignition signal
ON
Battery voltage
Unified meter A/C amp.
Ground
Continuity
Connector
Terminal
M67
55
Existed
71
Existed
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