Nissan Sentra B18 (2020-2025) Service Manual: P1603 Ecm
Dtc Description
DTC Description
DTC DETECTION LOGIC
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DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition |
|
|
P1603 |
CONTROL MODULE (CONTROL MODULE) |
Diagnosis condition |
— |
|
Signal (terminal) |
— |
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|
Threshold |
EEPROM (built-in microcomputer) system internal ECM does not function properly |
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|
Diagnosis delay time |
— |
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POSSIBLE CAUSE
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ECM
FAIL-SAFE
Not applicable
Confirmation Procedure
Confirmation Procedure
DTC CONFIRMATION PROCEDURE
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PRECONDITIONING
Perform the following procedure before performing DTC Confirmation Procedure.
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Turn ignition switch OFF and wait at least 10 seconds.
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Turn ignition switch ON.
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Turn ignition switch OFF and wait at least 10 seconds.
GO TO 2.
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PERFORM DTC CONFIRMATION PROCEDURE
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Start the engine and wait at least 10 seconds.
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Turn ignition switch OFF and wait at least 10 seconds.
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Repeat steps 1 and 2 for 4 times.
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Turn ignition switch ON.
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Erase DTC.
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Turn ignition switch OFF and wait at least 10 seconds.
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Start the engine and wait for 10 seconds.
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Check 1st trip DTC.
Is 1st trip DTC detected?
YES >>Refer to DTC Diagnosis Procedure.
NO-1 >>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO-2 >>Confirmation after repair: INSPECTION END
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Dtc Diagnosis Procedure
DTC Diagnosis Procedure
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INSPECTION START
Check that the battery negative terminal is not disconnected during ignition switch ON.
Is the inspection result normal?
YES >>GO TO 3.
NO >>GO TO 2.
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ERASE DTC
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Start the engine and let it idle at least 10 seconds.
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Turn ignition switch OFF.
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Repeat steps 1 and 2 for 4 times.
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Erase DTC.
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Turn ignition switch OFF and wait at least 10 seconds.
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Start the engine and let it idle for 10 seconds.
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Check 1st trip DTC.
Is DTC P1603 detected again?
YES >>Replace ECM. Refer to Removal & Installation.
NO >>INSPECTION END
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CHECK ECM POWER SUPPLY AND GROUND CIRCUIT
Check ECM power supply and ground circuit. Refer to Diagnosis Procedure.
Is the inspection result normal?
YES >>GO TO 4.
NO >>Repair or replace error-detected parts.
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CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to Intermittent Incident.
Is the inspection result normal?
YES >>GO TO 5.
NO >>Repair or replace error-detected parts.
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PERFORM DTC CONFIRMATION PROCEDURE
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Turn ignition switch ON.
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Erase DTC.
-
Perform DTC confirmation procedure. Refer to Confirmation Procedure.
Is the DTC P1603 detected again?
YES >>Replace ECM. Refer to Removal & Installation.
NO >>INSPECTION END
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Other materials:
C1711-7b Low Tire Pressure Fl
Dtc Description
DTC Description
Note:
The Signal Tech II Tool [– (NI-50190)] can be used
to perform the following functions: Refer to the Signal Tech II User
Guide for additional information.
Activate and display TPMS sensor IDs
Display tire pressure rep ...
Power Supply and Ground Circuit
A/c Auto Amp.
Diagnosis Procedure
Diagnosis Procedure
CHECK A/C AUTO AMP. GROUND CIRCUIT
FOR OPEN
Ignition switch OFF.
Disconnect A/C auto amp. connector.
...
B2f73-23 Clutch Switch
Dtc Description
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen items
(Trouble diagnosis
content)
DTC detecting condition
...