Nissan Sentra B18 (2020-2025) Service Manual: B2c20-23 Starter Cut Relay
Dtc Description
DTC Description
DTC DETECTION LOGIC
|
DTC No. |
CONSULT screen items (Trouble diagnosis content) |
DTC detecting condition |
|
|---|---|---|---|
|
B2C20-23 |
Starter cut relay (Starter cut relay) |
Diagnosis condition |
Ignition switch ON |
|
Signal (terminal) |
|
||
|
Threshold |
When the starter cut relay status signal transmitted from IPDM E/R via CAN communication is OFF after even though BCM is operating the starter cut relay ON output. |
||
|
Diagnosis delay time |
1 second or less |
||
POSSIBLE CAUSE
-
Harness or connectors
(The CAN communication line is open or shorted)
-
Harness or connectors
(Starter cut relay circuit is short to ground or open)
-
Starter cut relay
FAIL-SAFE
—
Confirmation Procedure
Confirmation Procedure
-
PERFORM DTC CONFIRMATION PROCEDURE
-
-
Ignition switch ON under the following conditions and wait 1 second or more:
-
CVT models
-
Selector lever: In the P position.
-
Brake pedal: Depressed.
-
-
M/T models
-
Shift lever: In the neutral position.
-
Clutch pedal or Brake pedal: Depressed.
-
-
-
CONSULTSelect “Self Diagnostic Result” mode of “BCM”.
-
Is the DTC detected?
YES>>Refer to DTC Diagnosis Procedure.
NO>>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO>>Confirmation after repair: Inspection End.
-
Dtc Diagnosis Procedure
DTC Diagnosis Procedure
-
CHECK STARTER CUT RELAY INPUT SIGNAL
-
Check voltage between BCM harness connector and ground.
(+)
(-)
Condition
Voltage
(Approx.)
BCM
Connector
Terminal
M142
123
Ground
At engine cranking
0 V
Other than above
Battery voltage
Is the inspection result normal?
YES >>GO TO 4.
NO >>GO TO 2.
-
-
CHECK STARTER CUT RELAY INPUT SIGNAL CIRCUIT
-
-
Ignition switch OFF.
-
Disconnect BCM connector and starter cut relay connector.
-
Check continuity between BCM harness connector and starter cut relay harness connector.
BCM
Starter cut relay
Continuity
Connector
Terminal
Connector
Terminal
M142
123
H-2
2
Yes
-
Check continuity between BCM harness connector and ground.
BCM
—
Continuity
Connector
Terminal
M142
123
Ground
No
-
Is the inspection result normal?
YES >>GO TO 3.
NO >>Repair or replace harness.
-
-
CHECK FUSIBLE LINK
-
Check that the following fusible link is not blown (open):
Signal name
Fusible link No.
Capacity
Battery power supply
M
30 A
Is the fusible link blown (open)?
YES >>Replace the blown (open) fusible link after repairing the affected circuit if a fusible link is blown (open).
NO >>GO TO 6.
-
-
CHECK STARTER CUT RELAY OUTPUT SIGNAL
-
Check voltage between IPDM E/R harness connector and ground.
(+)
(-)
Condition
Voltage
(Approx.)
IPDM E/R
Connector
Terminal
F97
86
Ground
Other than at engine cranking
0 - 1 V
At engine cranking
Battery voltage
Is the inspection result normal?
YES >>Inspection End.
NO >>GO TO 5.
-
-
CHECK STARTER CUT RELAY OUTPUT SIGNAL CIRCUIT
-
-
Ignition switch OFF.
-
Disconnect IPDM E/R connector and starter cut relay connector.
-
Check continuity between IPDM E/R harness connector and starter cut relay harness connector.
IPDM E/R
Starter cut relay
Continuity
Connector
Terminal
Connector
Terminal
F97
86
H-2
5
Yes
-
Check continuity between IPDM E/R harness connector and ground.
IPDM E/R
—
Continuity
Connector
Terminal
F97
86
Ground
No
-
Is the inspection result normal?
YES >>GO TO 6.
NO >>Repair or replace harness.
-
-
CHECK STARTER CUT RELAY
-
Check starter cut relay. Refer to Component Inspection.
Is the inspection result normal?
YES >>Inspection End.
NO >>Replace starter cut relay.
-
Other materials:
Turn Signal Lamp
Component Inspection
Component Inspection
CHECK TURN SIGNAL LAMP
Ignition switch OFF.
Disconnect front combination lamp connector, rear
combination lamp (body side) connecto ...
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Dtc Description
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
...
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Component Function Check
Component Function Check
CHECK ECO MODE SWITCH OPERATION
Ignition switch ON.
Check ECO mode indicator turns ON/OFF
on combination meter when turn ECO mode switch
O ...