Nissan Leaf. Manual — part 1133
ST-24
< DTC/CIRCUIT DIAGNOSIS >
[WITH HEATED STEERING WHEEL]
HEATED STEERING WHEEL SWITCH INDICATOR LAMP
2. Check continuity between heated steering wheel relay harness connector terminal and heated steering
wheel switch harness connector terminal.
3. Check continuity between heated steering wheel relay harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK HEATED STEERING WHEEL RELAY
Check heated steering wheel relay. Refer to
ST-21, "Component Inspection (Heated Steering Wheel Relay)"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace heated steering wheel relay. Refer to
ST-8, "HEATED STEERING WHEEL SYSTEM :
5.
CHECK POWER SOURCE (BATTERY)
Check the following.
• 12V battery
• Harness for short or open between 12V battery and 15A fuse (No. 8)
• 15A fuse (No. 8)
• Harness for short or open between 15A fuse (No. 8) and heated steering wheel relay
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace damaged parts.
6.
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 switch
harness connector terminal.
2. Check continuity between A/C auto amp. harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace damaged parts.
7.
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).
Heated steering wheel relay
Heated steering wheel switch
Continuity
Connector
Terminal
Connector
Terminal
M7
5
M6
5
Yes
Heated steering wheel relay
Ground
Continuity
Connector
Terminal
M7
5
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 INDICATOR LAMP
ST-25
< DTC/CIRCUIT DIAGNOSIS >
[WITH HEATED STEERING WHEEL]
C
D
E
F
H
I
J
K
L
M
A
B
ST
N
O
P
NO
>> Replace heated steering wheel switch. Refer to
ST-46, "Removal and Installation"
.
Component Inspection (Heated Steering Wheel Switch)
INFOID:0000000010119091
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.
• 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 Relay)
INFOID:0000000010119092
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?
YES
>> Inspection End.
NO
>> Replace heated steering wheel relay. Refer to
ST-8, "HEATED STEERING WHEEL SYSTEM :
.
Heated steering wheel switch
Condition
Continuity
Terminal
1
2
While pushing heated steering
wheel switch
Yes
Other condition
No
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 relay
Condition
Continuity
Terminal
3
− 5
Apply 12 V direct current between terminals
1 and 2.
Yes
Other conditions.
No
ST-26
< SYMPTOM DIAGNOSIS >
[WITH HEATED STEERING WHEEL]
HEATED STEERING WHEEL SYSTEM DOES NOT ACTIVATE
SYMPTOM DIAGNOSIS
HEATED STEERING WHEEL SYSTEM DOES NOT ACTIVATE
Description
INFOID:0000000010119093
• The heated steering wheel does not warm up.
• The heated steering wheel system cannot be turned OFF.
Diagnosis Procedure
INFOID:0000000010119094
Regarding Wiring Diagram information. Refer to
1.
CHECK POWER SOURCE
1. Turn power switch OFF.
2. Remove the heated steering wheel. Refer to
ST-34, "Removal and Installation"
.
3. Turn power switch ON.
4. Turn heated steering wheel switch ON.
5. Check voltage between heated steering wheel harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
CHECK HEATED STEERING WHEEL
Check heated steering wheel. Refer to
ST-21, "Component Inspection (Heated Steering Wheel)"
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace heated steering wheel. Refer to
ST-34, "Removal and Installation"
.
3.
CHECK GROUND CIRCUIT
Check continuity between heated steering wheel harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK HARNESS BETWEEN HEATED STEERING WHEEL RELAY AND HEATED STEERING WHEEL
1. Turn power switch OFF.
2. Disconnect heated steering wheel relay connector. Refer to
ST-8, "HEATED STEERING WHEEL SYS-
TEM : Component Parts Location"
3. Check continuity between heated steering wheel relay harness connector terminal and heated steering
wheel harness connector terminal.
Heated steering wheel
Condition
Voltage (Approx.)
Connector
Terminal
M111
1
− 2
Within 30 seconds after
turning ON the heated
steering switch.
Battery voltage
Other conditions.
0 V
Heated steering wheel
Ground
Continuity
Connector
Terminal
M111
2
Yes
HEATED STEERING WHEEL SYSTEM DOES NOT ACTIVATE
ST-27
< SYMPTOM DIAGNOSIS >
[WITH HEATED STEERING WHEEL]
C
D
E
F
H
I
J
K
L
M
A
B
ST
N
O
P
4. Check continuity between heated steering wheel relay harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace damaged parts.
5.
CHECK HEATED STEERING WHEEL RELAY
Check heated steering wheel relay. Refer to
ST-21, "Component Inspection (Heated Steering Wheel Relay)"
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace heated steering wheel relay. Refer to
ST-8, "HEATED STEERING WHEEL SYSTEM :
.
6.
CHECK POWER SOURCE (BATTERY)
Check the following.
• 12V battery
• Harness for short or open between 12V battery and 15A fuse (No. 8)
• 15A fuse (No. 8)
• Harness for short or open between 15A fuse (No. 8) and heated steering wheel relay
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace damaged parts.
7.
CHECK GROUND CIRCUIT
Check continuity between heated steering wheel switch harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair or replace damaged parts.
8.
CHECK HARNESS BETWEEN HEATED STEERING WHEEL RELAY AND A/C AUTO AMP.
1. Check continuity between heated steering wheel relay harness connector terminal and A/C auto amp.
harness connector terminal.
2. Check continuity between heated steering wheel relay harness connector terminal and ground.
Is the inspection result normal?
Heated steering wheel relay
Heated steering wheel
Continuity
Connector
Terminal
Connector
Terminal
M7
5
M111
1
Yes
Heated steering wheel relay
Ground
Continuity
Connector
Terminal
M7
5
No
Heated steering wheel switch
Ground
Continuity
Connector
Terminal
M6
2
Yes
Heated steering wheel relay
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M7
2
M55
22
Yes
Heated steering wheel relay
Ground
Continuity
Connector
Terminal
M7
2
No
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