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Nissan Sentra Service Manual: Dtc/circuit diagnosis

Nissan Sentra Service Manual / Electrical & power control / Power control system / IPDM E/R (With i-key) / 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.

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Front disc brake
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Tcm branch line circuit
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