Nissan Frontier. Manual — part 982
LAN-78
< DTC/CIRCUIT DIAGNOSIS >
[CAN]
HVAC BRANCH LINE CIRCUIT
HVAC BRANCH LINE CIRCUIT
Diagnosis Procedure
INFOID:0000000009479137
1.
CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the front air control for damage, bend and loose connection (unit
side and connector side).
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair the terminal and connector.
2.
CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of front air control.
2. Check the resistance between the front air control harness connector terminals.
-
With auto A/C models
-
With manual A/C models
Is the measurement value within the specification?
YES
>> GO TO 3.
NO
>> Repair the front air control branch line.
3.
CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the front air control. Refer to .
• Auto A/C models:
HAC-59, "Front Air Control Power and Ground Diagnosis Procedure"
• Manual A/C models:
HAC-128, "Front Air Control Power and Ground Diagnosis Procedure"
Is the inspection result normal?
YES (Present error)>>Replace the front air control. Refer to
VTL-7, "Removal and Installation"
.
YES (Past error)>>Error was detected in the front air control branch line.
NO
>> Repair the power supply and the ground circuit.
Front air control harness connector
Resistance (
Ω)
Connector No.
Terminal No.
M56
37
36
Approx. 54 – 66
Front air control harness connector
Resistance (
Ω)
Connector No.
Terminal No.
M59
37
36
Approx. 54 – 66
LAN
4WD BRANCH LINE CIRCUIT
LAN-79
< DTC/CIRCUIT DIAGNOSIS >
[CAN]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
4WD BRANCH LINE CIRCUIT
Diagnosis Procedure
INFOID:0000000009479138
1.
CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the transfer control unit for damage, bend and loose connection
(unit side and connector side).
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair the terminal and connector.
2.
CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of transfer control unit.
2. Check the resistance between the transfer control unit harness connector terminals.
Is the measurement value within the specification?
YES
>> GO TO 3.
NO
>> Repair the transfer control unit branch line.
3.
CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the transfer control unit. Refer to
.
Is the inspection result normal?
YES (Present error)>>Replace the transfer control unit. Refer to
DLN-92, "Removal and Installation"
.
YES (Past error)>>Error was detected in the transfer control unit branch line.
NO
>> Repair the power supply and the ground circuit.
Transfer control unit harness connector
Resistance (
Ω)
Connector No.
Terminal No.
M152
1
2
Approx. 54 – 66
LAN-80
< DTC/CIRCUIT DIAGNOSIS >
[CAN]
A-BAG BRANCH LINE CIRCUIT
A-BAG BRANCH LINE CIRCUIT
Diagnosis Procedure
INFOID:0000000009479139
WARNING:
Always observe the following items for preventing accidental activation.
• Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait 3 minutes
or more. (To discharge backup capacitor.)
• Never use unspecified tester or other measuring device.
1.
CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the air bag diagnosis sensor unit for damage, bend and loose con-
nection (unit side and connector side).
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the main harness.
2.
CHECK AIR BAG DIAGNOSIS SENSOR UNIT
Check the air bag diagnosis sensor unit. Refer to
Is the inspection result normal?
YES
>> Replace the main harness.
NO
>> Replace parts whose air bag system has a malfunction.
LAN
BCM BRANCH LINE CIRCUIT
LAN-81
< DTC/CIRCUIT DIAGNOSIS >
[CAN]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
BCM BRANCH LINE CIRCUIT
Diagnosis Procedure
INFOID:0000000009479140
1.
CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the BCM for damage, bend and loose connection (unit side and
connector side).
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair the terminal and connector.
2.
CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of BCM.
2. Check the resistance between the BCM harness connector terminals.
Is the measurement value within the specification?
YES
>> GO TO 3.
NO
>> Repair the BCM branch line.
3.
CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the BCM. Refer to
Is the inspection result normal?
YES (Present error)>>Replace the BCM. Refer to
BCS-49, "Removal and Installation"
.
YES (Past error)>>Error was detected in the BCM branch line.
NO
>> Repair the power supply and the ground circuit.
BCM harness connector
Resistance (
Ω)
Connector No.
Terminal No.
M18
39
40
Approx. 54 – 66
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