Nissan Sentra manuals

Nissan Sentra Service Manual: 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 “DTC CONFIRMATION PROCEDURE” 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


  1. Turn the ignition switch ON.

  2. Perform self diagnosis for “ABS”.

Is DTC “U1002” detected? YES >> Proceed to BRC-88, "Diagnosis Procedure".

NO >> Inspection End.

Diagnosis Procedure

CAUTION:

1.CHECK CAN DIAGNOSIS SUPPORT MONITOR

  1. Select “ABS” and “CAN Diagnosis Support Monitor” in order with CONSULT.

  2. Check malfunction history between each control unit connected to ABS actuator and electric unit (control unit).

Check the result of “PAST”? All items are “OK”>>Refer to GI-39, "Intermittent Incident".

“TRANSMIT DIAG” is other than “OK”>>GO TO 2.

A control unit other than ABS actuator and electric unit (control unit) is anything other than “OK”>>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 “ABS” 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.

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