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Nissan Sentra Service Manual: Dtc/circuit diagnosis

Nissan Sentra Service Manual / Electrical & power control / Power control system / IPDM  e/r (without 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) 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-55, "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-58, "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-56, "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-58, "Removal and Installation".

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

Power supply and ground circuit

Diagnosis procedure

Regarding Wiring Diagram information, refer to PCS-49, "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
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