Nissan Rogue Service Manual: U1040 ENG comm circuit
DTC Description
DTC DETECTION LOGIC
| DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition |
| U1040 | ENG COMM CIRCUIT (Engine communication circuit) | ECM cannot transmit a communication signal to generator. |
POSSIBLE CAUSE
- Harness or connectors (LIN communication circuit is open or shorted.)
- ECM
FAIL-SAFE
Not applicable
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted. always perform the following procedure before conducting the next test.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
- Turn ignition ON and wait at least 10 seconds.
- Check DTC.
Is DTC detected? YES >> Proceed to EC-171, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK LIN COMMUNICATION CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector and generator harness connector.
- Check the continuity between ECM harness connector and generator harness connector.
- Also check harness for short to power and short to ground.
Is the inspection result normal? YES >> GO TO 2.
NO >> Repair or replace error-detected parts.
2.REPLACE GENERATOR
- Replace generator. Refer to CHG-20, "Removal and Installation".
- Erase DTC.
- Perform DTC confirmation procedure again. Refer to EC-171, "DTC Description".
Is DTC detected again? YES >> Replace ECM. Refer to EC-499, "Removal and Installation".
NO >> INSPECTION END
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Description
CAN (Controller Area Network) is a serial communication line for real time
application. It is an on-vehicle multiplex
communication line with high data communication speed and excellen ...
U1044 ENG comm circuit
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
U1044
ENG COMM CIRCUIT
(Engine communication circu ...
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Exploded View
Rear suspension arm
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Rear suspension arm bracket
Rear suspension arm stay
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Removal and Installation
REMOVAL
Remove the wheel hub and bearing. Refer to RAX-16, "Removal and
Installation".
Remove the coil spring. R ...
B142A ignition voltage
Description
DTC B142A IGNITION VOLTAGE
Ignition voltage is supplied to the air bag diagnosis sensor unit when the
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PART LOCATION
Refer to SRC-6, "Component Parts Location" ...
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DTC Description
DTC DETECTION LOGIC
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
U0073
COMM BUS A OFF
(Control Module Communication Bus A Off)
TCM communication blockage lasts for 2 seconds or more when turning
ON the ignition sw ...
