Nissan Sentra B18 (2020-2025) Service Manual: Power Supply and Ground Circuit. Intelligent Key Unit
Intelligent Key Unit
Diagnosis Procedure
Diagnosis Procedure
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CHECK FUSE
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Check that the following fuse is not blown:
Terminal
Signal name
Fuse No.
Capacity
1
Intelligent Key unit power supply
31
10 A
Is the fuse blown?
YES >>Replace the blown fuse after repairing the affected circuit.
NO >>GO TO 2.
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CHECK POWER SUPPLY CIRCUIT
-
-
Disconnect Intelligent Key unit connector.
-
Check voltage between Intelligent Key unit connector and ground.
Intelligent Key unit
—
Voltage
(Approx.)
Connector
Terminal
M155
1
Ground
Battery voltage
-
Is the inspection result normal?
YES >>GO TO 3.
NO >>Repair or replace harness or connectors.
-
-
CHECK GROUND CIRCUIT
-
Check continuity between Intelligent Key unit connector and ground.
Intelligent Key unit
—
Continuity
Connector
Terminal
M155
29
Ground
Yes
Is the inspection result normal?
YES>>Inspection End.
NO>>Repair or replace harness or connectors.
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Other materials:
B2223-16 Combination Meter
Dtc Description
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis
content)
DTC detected condition
...
Cushion Heater Lh
Component Function Check
Component Function
Check
CHECK FUNCTION
Check that cushion heater LH warms to the preset
temperature when operating the heated seat switch LH to HIGH and LOW.
Is the inspection result normal?
...
P0137 Ho2s2
Dtc Description
DTC Description
The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the air fuel ratio (A/F) sensor 1. The oxygen storage
capacity of the three way catalyst (manifold) causes the longer switching
time.
...