Nissan Sentra B18 (2020-2025) Service Manual: Power Supply and Ground Circuit. Diagnosis Procedure
Diagnosis Procedure
Diagnosis Procedure
-
CHECK FUSE
-
Check that the following fuse is not blown:
Signal name
Fuse No.
Capacity
Ignition power supply
49
10 A
Is the fuse blown?
YES >>Replace the blown fuse after repairing the affected circuit.
NO >>GO TO 2.
-
-
CHECK FUSIBLE LINK
-
Check that the following fusible link is not blown:
Signal name
Fusible link No.
Capacity
Battery
H
80 A
Is the fusible link blown?
YES >>Replace the blown fusible link after repairing the affected circuit.
NO >>GO TO 3.
-
-
POWER SUPPLY CIRCUIT CHECK
-
-
Disconnect EPS control unit connector.
-
Check voltage between EPS control unit harness connector and ground.
(+)
(—)
Ignition switch position
EPS control unit
Connector
Terminal
OFF
ON
START
E74
7
Ground
Battery voltage
Battery voltage
Battery voltage
E73
4
0 V
Battery voltage
Battery voltage
-
Is the inspection result normal?
YES >>GO TO 4.
NO >>Repair or replace harness or connector.
-
-
GROUND CIRCUIT CHECK
-
-
Ignition switch OFF.
-
Check continuity between EPS control unit harness connector and ground.
EPS control unit
—
Continuity
Connector
Terminal
E74
8
Ground
Yes
-
Is the inspection result normal?
YES >>Inspection End.
NO >>Repair or replace harness or connectors.
-
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