Nissan Sentra Service Manual: U1002 System comm (CAN)

Nissan Sentra Service Manual / Brakes / Brake control system / Dtc/circuit diagnosis / U1002 System comm (CAN)

DTC Logic

DTC DETECTION LOGIC

DTC	Display item	Malfunction detected condition	Possible cause
U1002	SYSTEM COMM(CAN)	When ABS actuator and electric unit (control unit) is not transmitting or receiving CAN communication signal for 2 seconds or less.	CAN communication line ABS actuator and electric unit (control unit)

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If вЂњDTC CONFIRMATION PROCEDUREвЂќ has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.DTC REPRODUCTION PROCEDURE

With CONSULT

Turn the ignition switch ON.
Perform self diagnosis for вЂњABSвЂќ.

Is DTC вЂњU1002вЂќ detected? YES >> Proceed to BRC-88, "Diagnosis Procedure".

NO >> Inspection End.

Diagnosis Procedure

CAUTION:

Never apply 7.0 V or more to the measurement terminal.
Use a tester with open terminal voltage of 7.0 V or less.
Turn the ignition switch OFF and disconnect the battery cable from the negative terminal when checking the harness.

1.CHECK CAN DIAGNOSIS SUPPORT MONITOR

Select вЂњABSвЂќ and вЂњCAN Diagnosis Support MonitorвЂќ in order with CONSULT.
Check malfunction history between each control unit connected to ABS actuator and electric unit (control unit).

Check the result of вЂњPASTвЂќ? All items are вЂњOKвЂќ>>Refer to GI-39, "Intermittent Incident".

вЂњTRANSMIT DIAGвЂќ is other than вЂњOKвЂќ>>GO TO 2.

A control unit other than ABS actuator and electric unit (control unit) is anything other than вЂњOKвЂќ>>GO TO 3.

2.CHECK TRANSMITTING SIDE UNIT

Check the ABS actuator and electric unit (control unit) harness connector terminals 14 and 26 for damage or loose connection.

Is the inspection result normal? YES >> Erase self-diagnosis results. Then perform self-diagnosis for вЂњABSвЂќ with CONSULT.

NO >> Recheck terminals for damage or loose connection.

3.CHECK APPLICABLE CONTROL UNIT

Check damage or loose connection of each CAN communication line harness connector terminals.

Is the inspection result normal? YES >> Erase self-diagnosis results. Then perform self-diagnosis for applicable control unit with CONSULT.

NO >> Recheck terminals for damage or loose connection.

U1000 CAN Comm circuit

DTC Logic DTC DETECTION LOGIC DTC Display Item Malfunction detected condition Possible causes U1000 CAN COMM CIRCUIT When CAN communication signal is not continuously ...

U1010 Control unit (CAN)

Description Initial diagnosis of ABS actuator and electric unit (control unit) DTC Logic DTC DETECTION LOGIC DTC Items (CONSULT screen terms) DTC detection condition Possible ...

Other materials:

Body side trim
Exploded View Rear body side welt Front body side welt Tether clip Front pillar finisher Metal clip Dash clip Dash side finisher Harness protector Front kicking plate inner Center pillar lower finisher Rear kicking plate inner Cap Center pillar upper finisher Rear p ...

Diagnosis and repair workflow
Work Flow OVERALL SEQUENCE *1: Include 1st trip DTC. *2: Include 1st trip freeze frame data. DETAILED FLOW 1.GET INFORMATION FOR SYMPTOM Get the detailed information from the customer about the symptom (the condition and the environment when the incident/malfunction occurred) using the ...

Seat belt warning system
Seat Belt Warning System Does Not Function 1.SEAT BELT WARNING LIGHT Turn ignition switch ON. Does the seat belt warning lamp come ON? YES >> GO TO 2. NO >> вЂў Check 10A fuse [No. 8, located in the fuse block (J/B)]. Check seat belt buckle switch (driver seat) Check ha ...