2008 NISSAN LATIO ignition

BL-110
< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM
With CONSULT-III
• Connect CONSULT-III, and turn ignition switch ON.
• Touch “INTELLIGENT KEY” on “SELECT SYSTEM” screen.
• Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.
• Check display content in self-diagnostic results.
OK or NG
NO DTC IS DETECTED>> INSPECTION END
CAN COMM [U1000]>> After printing “SELF-DIAGNOSIS RESULTS”, go to “CAN SYSTEM”. Refer to LAN-
15, "Trouble Diagnosis Flow Chart".
CAN COMM2 [U1010]>> Replace Intelligent Key unit.
Power Supply and Ground Circuit InspectionINFOID:0000000001704014
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit connector.
3. Check voltage between Intelligent Key unit harness connector and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace Intelligent Key power supply circuit.
2.CHECK GROUND CIRCUIT
Check continuity between Intelligent Key unit harness connector and ground.
OK or NG
OK >> Power supply and ground circuits are OK.
NG >> Repair or replace the Intelligent Key unit ground circuit.
Key Switch (Intelligent Key Unit Input) CheckINFOID:0000000001704015
1.CHECK KEY SWITCH INPUT SIGNAL
With CONSULT-III
Check key switch (“KEY SW”) in “DATA MONITOR” mode with CONSULT-III.
CONSULT-III display item DTC code
NO DTC IS DETECTED —
CAN COMM U1000
CAN COMM2 U1010
Te r m i n a l s
Voltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTe r m i n a l
M52 11 Ground Battery voltage
PIIB6595E
Intelligent Key unit connector Terminal
GroundContinuity
M52 12 Yes
PIIB6596E

INTELLIGENT KEY SYSTEM
BL-111
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit connector.
3. Check voltage between Intelligent Key unit and ground.
OK or NG
OK >> Key switch circuit is OK.
NG >> GO TO 2.
2.CHECK KEY SWITCH POWER SUPPLY CIRCUIT
1. Remove mechanical key from ignition switch.
2. Disconnect key switch and ignition knob switch connector.
3. Check voltage between key switch and ignition knob switch and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace key switch and ignition knob switch
power supply circuit.
3.CHECK KEY SWITCH
Check continuity of key switch and ignition knob switch.
OK or NG
OK >> GO TO 4.
NG >> Replace key cylinder assembly (built-in key switch).
4.CHECK KEY SWITCH CIRCUIT
1. Disconnect Intelligent Key unit connector.
Monitor item Condition
KEY SWInsert mechanical key into ignition switch: ON
Remove mechanical key from ignition switch: OFF
Te r m i n a l s
Condition of key switchVoltage (V)
(Approx.) (+)
(–)
Intelligent Key
unit connectorTe r m i n a l
M52 7 GroundInsert mechanical key
into ignition switchBattery voltage
Remove mechanical
key from ignition switch0
PIIB6597E
Te r m i n a l s
Voltage (V)
(Approx.) (+)
(–) Key switch and ig-
nition knob switch
connectorTe r m i n a l
M73 2 Ground Battery voltage
PIIB6598E
Te r m i n a l
Condition of key switch Continuity
Key switch and ignition knob switch
12Insert mechanical key into
ignition switchYe s
Remove mechanical key
from ignition switchNo
PIIB6599E

BL-112
< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM
2. Check continuity between Intelligent Key unit and key switch and ignition knob switch.
3. Check continuity between Intelligent Key unit and ground.
OK or NG
OK >> Check the condition of harness and harness connector.
NG >> Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.
Key Switch (BCM Input) CheckINFOID:0000000001704016
1.CHECK KEY SWITCH POWER SUPPLY CIRCUIT
1. Remove mechanical key from ignition switch.
2. Disconnect key switch and ignition knob switch connector.
3. Check voltage between key switch and ignition knob switch and
ground.
OK or NG
OK >> GO TO 2.
NG >> Check harness between key switch and ignition knob switch and fuse.
2.CHECK KEY SWITCH OPERATION
Check continuity of key switch and ignition knob switch.
OK or NG
OK >> GO TO 3.
NG >> Replace key cylinder assembly (built-in key switch).
3.CHECK KEY SWITCH CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM connector (A) M18 terminal 37 and key switch and ignition knob switch
connector (B) terminal 1.
AB
Continuity
Intelligent Key unit
connectorTe r m i n a lKey switch and ig-
nition knob switch
connectorTe r m i n a l
M52 7 M73 1 Yes
A
GroundContinuity
Intelligent Key unit connector Terminal
M52 7 No
PIIB6600E
Te r m i n a l s
Voltage (V)
(Approx.) (+)
(–) Key switch and ig-
nition knob switch
connectorTe r m i n a l
M73 2 Ground Battery voltage
PIIB6598E
Te r m i n a l
Condition of key switch Continuity
Key switch and ignition knob switch
12Insert mechanical key into
ignition switchYe s
Remove mechanical key
from ignition switchNo
PIIB6599E

INTELLIGENT KEY SYSTEM
BL-113
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
3. Check continuity between BCM connector (A) M18 terminal 37
and ground.
OK or NG
OK >> Key switch (BCM input) circuit is OK.
NG >> Repair or replace harness between key switch and ignition knob switch and BCM.
Ignition Knob Switch CheckINFOID:0000000001704017
1.CHECK IGNITION KNOB SWITCH INPUT SIGNAL
With CONSULT-III
Display “PUSH SW” on DATA MONITOR screen, and check if ON/OFF display is linked to ignition switch oper-
ation.
Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit connector.
3. Check voltage between Intelligent Key unit and ground.
OK or NG
OK >> Ignition knob switch circuit is OK.
NG >> GO TO 2.
2.CHECK IGNITION KNOB SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect key switch and ignition knob switch connector.
3. Check voltage between key switch and ignition knob switch and ground.
AB
Continuity
BCM connector TerminalKey switch and ig-
nition knob switch
connectorTe r m i n a l
M18 37 M73 1 Yes
A
GroundContinuity
BCM connector Terminal
M18 37 No
PIIB6601E
Monitor item Condition
PUSH SWIgnition switch is pressed: ON
Ignition switch is released: OFF
Te r m i n a l s
Condition of key
switchVoltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTe r m i n a l
M52 27 GroundIgnition switch is
pressedBattery voltage
Ignition switch is
released0
PIIB6602E

BL-114
< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM
OK or NG
OK >> GO TO 3.
NG >> Repair or replace key switch and ignition knob switch
power supply circuit.
3.CHECK IGNITION KNOB SWITCH
Check continuity of ignition knob switch.
OK or NG
OK >> GO TO 4.
NG >> Replace key switch and ignition knob switch.
4.CHECK IGNITION KNOB SWITCH CIRCUIT
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit connector (A) terminal 27 and key switch and ignition knob
switch connector (B) terminal 3.
3. Check continuity between Intelligent Key unit connector (A) ter-
minal 27 and ground.
OK or NG
OK >> Check the condition of harness and harness connector.
NG >> Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.
Door Switch Check (Hatchback)INFOID:0000000001704018
1.CHECK DOOR SWITCHES INPUT SIGNAL
With CONSULT-III
Check door switches ("DOOR SW-DR", "DOOR SW-AS", "DOOR SW-RL", "DOOR SW-RR", "BACK DOOR
SW") in DATA MONITOR mode with CONSULT–III. Refer to BL-36, "
CONSULT-III Function (BCM)".
• When doors are open:
Te r m i n a l s
Voltage (V)
(Approx.) (+)
(–) Key switch and ig-
nition knob switch
connectorTe r m i n a l
M73 4 Ground Battery voltage
PIIB6603E
Te r m i n a l
Condition of key
switchContinuity
Key switch and ignition knob switch
34Ignition switch is
pressedYe s
Ignition switch is
releasedNo
PIIB6604E
AB
Continuity
Intelligent Key unit
connectorTe r m i n a lKey switch and ig-
nition knob switch
connectorTe r m i n a l
M52 27 M73 3 Yes
A
GroundContinuity
Intelligent Key unit connector Terminal
M52 27 No
PIIB6605E

INTELLIGENT KEY SYSTEM
BL-115
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
• When doors are closed:
Without CONSULT-III
Check voltage between BCM connector M18 or M19 terminals 12, 13, 43, 47, 48 and ground.
OK or NG
OK >> Door switch circuit is OK.
NG >> GO TO 2.
2.CHECK DOOR SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door switch and BCM.
3. Check continuity between door switch connector (B) B8 (front LH), B108 (front RH) terminal 2 or (C) B6
(rear LH), B116 (rear RH) terminal 1 or back door lock assembly connector (D) D405 terminal 3 and BCM
connectors (A) M18, M19 terminals 12, 13, 43, 47 and 48. DOOR SW-DR : ON
DOOR SW-AS : ON
DOOR SW-RL : ON
DOOR SW-RR : ON
BACK DOOR SW : ON
DOOR SW-DR : OFF
DOOR SW-AS : OFF
DOOR SW-RL : OFF
DOOR SW-RR : OFF
BACK DOOR SW : OFF
Connector ItemTe r m i n a l s
ConditionVoltage (V)
(Approx.)
( + ) ( – )
M18Front door
switch RH12
GroundOpen
↓
Closed0
↓
Battery voltage Rear door
switch RH13
M19Back door
switch43
Front door
switch LH47
Rear door
switch LH48
LIIA1041E

BL-118
< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM
OK or NG
OK >> Door switch circuit is OK.
NG >> GO TO 2.
2.CHECK DOOR SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door switch and BCM.
3. Check continuity between door switch connector B8 (Front LH) or B108 (Front RH) terminal 2, B6 (Rear
LH) or B116 (Rear RH) terminal 1 and BCM connector M18, M19 terminals 12, 13, 47 and 48.
4. Check continuity between door switch connector B8 (Front LH)
or B108 (Front RH) terminal 2, B6 (Rear LH) or B116 (Rear RH)
terminal 1 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.CHECK DOOR SWITCHES
Check continuity between door switch terminal and switch case ground.
OK or NG
OK >> Check door switch case ground condition.
NG >> Replace door switch.
Door Request Switch CheckINFOID:0000000001704020
1.CHECK DOOR REQUEST SWITCH
With CONSULT-III
Check door request switch (“DR REQ SW” or “AS REQ SW”) in “DATA MONITOR” mode.
Connector ItemTe r m i n a l s
ConditionVoltage (V)
(Approx.)
( + ) ( – )
M19Front door
switch LH47
GroundOpen
↓
Closed0
↓
Battery voltage Rear door
switch LH48
M18Front door
switch RH12
Rear door
switch RH13
LIIA1177E
2 - 47 : Continuity should exist.
2 - 12 : Continuity should exist.
1 - 48 : Continuity should exist.
1 - 13 : Continuity should exist.
2 - Ground : Continuity should not exist.
1 - Ground : Continuity should not exist.
LIIA1350E
Component TerminalsCondition of
switchContinuity
Front door switch
LH/RH2 – Case groundPushed No
Released Yes
Rear door switch
LH/RH1 – Case groundPushed No
Released Yes
LIIA0550E

INTELLIGENT KEY SYSTEM
BL-119
< SERVICE INFORMATION >
C
D
E
F
G
H
J
K
L
MA
B
BL
N
O
P
Without CONSULT-III
1. Turn ignition switch OFF.
2. Check voltage between Intelligent Key unit harness connector and ground.
OK or NG
OK >> Door request switch circuit is OK.
NG >> GO TO 2.
2.CHECK DOOR REQUEST SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit and front door request switch connector.
3. Check continuity between Intelligent Key unit connector and front door request switch connector.
4. Check continuity between Intelligent Key unit connector and
ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between Intelligent Key unit and front door request switch.
3.CHECK DOOR REQUEST SWITCH OPERATION
Check front door request switch.
Monitor item Condition
DR REQ SW
AS REQ SWDoor request switch is pressed: ON
Door request switch is released: OFF
Te r m i n a l s
Door re-
quest
switch
ConditionVoltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTe r m i n a l
M52Front door re-
quest switch LH5
GroundPressed 0
Released 5
Front door re-
quest switch RH25Pressed 0
Released 5
PIIB6613E
AB
Continuity
Intelligent Key unit
connectorTe r m i n a lFront door request
switch connectorTe r m i n a l
M525LH D5
1Yes
25 RH D103
A
GroundContinuity
Intelligent Key unit
connectorTe r m i n a l
M525
No
25
PIIB6614E