Nissan Leaf. Manual — part 1132
ST-20
< DTC/CIRCUIT DIAGNOSIS >
[WITH HEATED STEERING WHEEL]
HEATED STEERING WHEEL SYSTEM
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair or replace damaged parts.
9.
CHECK HARNESS BETWEEN A/C AUTO AMP. AND HEATED STEERING WHEEL SWITCH
1. Check continuity between A/C auto amp. harness connector terminal and heated steering wheel harness
connector terminal.
2. Check continuity between A/C auto amp. harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair or replace damaged parts.
10.
CHECK HEATED STEERING WHEEL SWITCH
Check heated steering wheel switch. Refer to
ST-9, "HEATED STEERING WHEEL SYSTEM : Heated Steer-
.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-187, "Removal and Installation"
(with heat pump) or
347, "Removal and Installation"
(without heat pump).
NO
>> Replace heated steering wheel switch. Refer to
ST-46, "Removal and Installation"
.
Component Inspection (Heated Steering Wheel Switch)
INFOID:0000000010119086
1.
CHECK HEATED STEERING WHEEL SWITCH
1. Turn power switch OFF.
2. Remove the heated steering wheel switch. Refer to
ST-46, "Removal and Installation"
.
3. Check continuity between heated steering wheel switch harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace heated steering wheel switch. Refer to
ST-46, "Removal and Installation"
.
2.
CHECK HEATED STEERING WHEEL SWITCH INDICATOR LAMP
Apply a voltage of 12V between the heated steering wheel switch connector terminals to check that the indica-
tor lamp turns ON.
CAUTION:
• Connect the fuse between the terminals when applying the voltage.
• To prevent damage, always observe the correct polarity.
Heated steering wheel relay
Ground
Continuity
Connector
Terminal
M7
2
No
A/C auto amp.
Heated steering wheel switch
Continuity
Connector
Terminal
Connector
Terminal
M55
16
M6
1
Yes
A/C auto amp.
Ground
Continuity
Connector
Terminal
M55
16
No
Heated steering wheel switch
Condition
Continuity
Terminal
1
2
While pushing heated steering
wheel switch
Yes
Other condition
No
HEATED STEERING WHEEL SYSTEM
ST-21
< DTC/CIRCUIT DIAGNOSIS >
[WITH HEATED STEERING WHEEL]
C
D
E
F
H
I
J
K
L
M
A
B
ST
N
O
P
• Prevent short-circuit.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace heated steering wheel switch. Refer to
ST-46, "Removal and Installation"
.
Component Inspection (Heated Steering Wheel)
INFOID:0000000010119087
1.
CHECK HEATED STEERING WHEEL CONTINUITY
1. Turn power switch OFF.
2. Remove the heated steering wheel. Refer to
ST-34, "Removal and Installation"
3. Check continuity between heated steering wheel harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace heated steering wheel. Refer to
ST-34, "Removal and Installation"
.
2.
CHECK HEATED STEERING WHEEL RESISTANCE
Check resistance between heated steering wheel connector terminals.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace heated steering wheel. Refer to
ST-34, "Removal and Installation"
.
Component Inspection (Heated Steering Wheel Relay)
INFOID:0000000010119088
1.
CHECK HEATED STEERING WHEEL RELAY CONTINUITY
Check continuity between heated steering wheel relay terminals.
CAUTION:
• Connect the fuse between the terminals when applying the voltage.
• To prevent damage, always observe the correct polarity.
• Prevent short-circuit.
Is the inspection result normal?
Heated steering wheel switch
Condition
Indicator lamp status
Terminal
+
–
5
6
Apply 12 V direct current be-
tween terminals 5 and 6.
ON
Heated steering wheel
Condition
Continuity
Terminal
1
− 2
Leather surface temperature of 20
°C
(68
°F) or less
Yes
Leather surface temperature of 30
°C
(86
°F) or more
No
Heated steering wheel
Condition
Resistance
Terminal
1
− 2
Leather surface temperature of 20
°C
(68
°F)
1.7 – 2.17
Ω
Heated steering wheel relay
Condition
Continuity
Terminal
3
− 5
Apply 12 V direct current between terminals
1 and 2.
Yes
Other conditions.
No
ST-22
< DTC/CIRCUIT DIAGNOSIS >
[WITH HEATED STEERING WHEEL]
HEATED STEERING WHEEL SYSTEM
YES
>> Inspection End.
NO
>> Replace heated steering wheel relay. Refer to
HEATED STEERING WHEEL SWITCH INDICATOR LAMP
ST-23
< DTC/CIRCUIT DIAGNOSIS >
[WITH HEATED STEERING WHEEL]
C
D
E
F
H
I
J
K
L
M
A
B
ST
N
O
P
HEATED STEERING WHEEL SWITCH INDICATOR LAMP
Component Function Check
INFOID:0000000010119089
1.
CHECK HEATED STEERING WHEEL INDICATOR LAMP
1. Turn power switch ON.
2. Turn heated steering wheel switch ON.
Does heated steering wheel indicator lamp turn on the lamp?
YES
>> GO TO 2.
NO
>> Go to
.
2.
CHECK HEATED STEERING WHEEL INDICATOR LAMP
Turn heated steering wheel switch OFF.
Does heated steering wheel indicator lamp turn off the lamp?
YES
>> Inspection End.
NO
>> Go to
.
Diagnosis Procedure
INFOID:0000000010119090
Regarding Wiring Diagram information. Refer to
1.
CHECK POWER SOURCE
1. Turn power switch ON.
2. Turn heated steering wheel switch ON.
3. Check voltage between heated steering wheel switch harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 2.
2.
CHECK GROUND CIRCUIT
1. Turn power switch OFF.
2. Disconnect heated steering wheel switch connector. Refer to
ST-46, "Removal and Installation"
.
3. Check continuity between heated steering wheel switch harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK HARNESS BETWEEN HEATED STEERING WHEEL RELAY AND HEATED STEERING WHEEL
SWITCH
1. Disconnect heated steering wheel relay connector. Refer to
ST-8, "HEATED STEERING WHEEL SYS-
TEM : Component Parts Location"
.
Heated steering wheel switch
Condition
Voltage (Approx.)
Connector
Terminal
M6
5
− 6
Within 30 seconds after
turning ON the heated
steering switch.
Battery voltage
Other conditions.
0 V
Heated steering wheel switch
Ground
Continuity
Connector
Terminal
M6
6
Yes
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