Nissan Sentra manuals

Nissan Sentra Service Manual: Dtc/circuit diagnosis

U1000 can comm circuit

Description

Refer to LAN-7, "CAN COMMUNICATION SYSTEM : System Description".

Dtc logic

DTC DETECTION LOGIC

CONSULT Display

DTC Detection Condition

Possible Cause

CAN COMM CIRCUIT [U1000] When IPDM E/R cannot communicate with CAN communication signal continuously for 2 seconds or more In CAN communication system, any item (or items) of the following listed below is malfunctioning.
  • Transmission
  • Receiving (ECM)
  • Receiving (BCM)
  • Receiving (Combination meter)

Diagnosis procedure

1. PERFORM SELF DIAGNOSTIC RESULT

  1. Turn ignition switch ON and wait for 2 second or more.
  2. Check “SELF-DIAG RESULTS” of IPDM E/R.

Is “CAN COMM CIRCUIT” displayed? YES >> Refer to LAN-16, "Trouble Diagnosis Flow Chart".

NO >> Refer to GI-39, "Intermittent Incident".

B2098 ignition relay on stuck

Dtc logic

DTC DETECTION LOGIC

CONSULT Display

DTC Detection Condition

Possible Cause

IGN RELAY ON [B2098] The ignition relay ON is detected for 1 second at ignition switch OFF (CPU monitors the status at the contact and excitation coil circuits of the ignition relay inside it) IPDM E/R

DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE

  1. Turn the power supply position to start under the following conditions and wait for at least 1 second.

CVT model

M/T model

  1. Check “Self-diagnostic result” with CONSULT.

Is DTC detected? YES >> Refer to PCS-27, "Diagnosis Procedure".

NO >> Inspection End.

Diagnosis procedure

1. PERFORM SELF DIAGNOSTIC RESULT

Perform Self Diagnostic Result of IPDM E/R using CONSULT.

Is display history of DTC B2098 CRNT? YES >> Replace IPDM E/R. Refer to PCS-30, "Removal and Installation".

NO >> Refer to GI-39, "Intermittent Incident".

B2099 ignition relay off stuck

Dtc logic

DTC DETECTION LOGIC

CONSULT Display

DTC Detection Condition

Possible Cause

IGN RELAY OFF [B2099] The ignition relay OFF is detected for 1 second at ignition switch ON (CPU monitors the status at the contact and excitation coil circuits of the ignition relay inside it) IPDM E/R

DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE

  1. Turn the power supply position to start under the following conditions and wait for at least 1 second.

CVT model

M/T model

  1. Check “Self-diagnostic result” with CONSULT

Is DTC detected? YES >> Refer to PCS-28, "Diagnosis Procedure".

NO >> Inspection End.

Diagnosis procedure

1. PERFORM SELF DIAGNOSTIC RESULT

Perform Self Diagnostic Result of IPDM E/R using CONSULT.

Is display history of DTC B2099 CRNT? YES >> Replace IPDM E/R. Refer to PCS-30, "Removal and Installation".

NO >> Refer to GI-39, "Intermittent Incident".

Power supply and ground circuit

Diagnosis procedure

Regarding Wiring Diagram information, refer to PCS-21, "Wiring Diagram".

1. Check fuse and fusible links

Check that the following ipdm e/r fusible links are not blown.

Is the fusible link blown?


Is the fusible link blown? Yes >> replace the blown fusible link after repairing the affected circuit.

No >> go to 2

2. Check power supply circuit

  1. Disconnect ipdm e/r connector e42 and e44.
  2. Check voltage between ipdm e/r connector e42 and e44 and ground.

Is the inspection result normal?


Is the inspection result normal? Yes >> go to 3

No >> repair harness or connectors.

3. Check ground circuit

  1. Turn ignition switch OFF.
  2. Disconnect ipdm e/r connector e47 and e48.
  3. Check continuity between ipdm e/r connector e47 and e48 and ground.

Is the inspection result normal?


Is the inspection result normal? Yes >> inspection end.

No >> repair harness or connectors.

Wiring diagram
Ipdm e/r (intelligent power distribution module engine room) Wiring diagram ...

Removal and installation
Ipdm e/r Exploded view Ipdm e/r Ipdm e/r cover a Ipdm e/r cover b Removal and installation Caution: Ipdm e/r integrated relays are not serviceable and must not be removed from unit. ...

Other materials:

Basic inspection
DIAGNOSIS AND REPAIR WORK FLOW Work Flow NOTE: “DTC” includes DTC at the 1st trip. 1.OBTAIN INFORMATION ABOUT SYMPTOM Refer to TM-140, "Diagnostic Work Sheet" and interview the customer to obtain the malfunction information (conditions and environment when the malfunctio ...

Diagnosis and repair workflow
Work flow Overall sequence Detailed flow 1. Obtain information about symptom Interview the customer to obtain as much information as possible about the conditions and environment under which the malfunction occurred. >> GO TO 2. 2. Confirm concern Check the malfunction on the veh ...

Terms
It is important to familiarize yourself with the following terms before loading your vehicle: Curb Weight (actual weight of your vehicle) - vehicle weight including: standard and optional equipment, fluids, emergency tools, and spare tire assembly. This weight does not include passen ...

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