Nissan Sentra manuals

Nissan Sentra Service Manual: P1652 Starter motor system comm

Description

ECM controls ON/OFF state of the starter relay, according to the engine and vehicle condition. ECM transmits a control signal to IPDM E/R via BCM by CAN communication.

Under normal conditions, ECM controls and maintains the starter relay in OFF state during following condition:

When detecting a decrease in engine speed due to rapid deceleration or heavy load condition, ECM controls and reactivates the starter relay.

IPDM E/R detects a control state of starter relay and starter control relay and transmits a feedback signal to ECM via CAN communication.

DTC Logic

DTC DETECTION LOGIC

NOTE:

DTC No.

CONSULT screen terms (Trouble diagnosis content)

DTC detecting condition

Possible cause

P1652 STR MTR SYS COMM (Starter motor system communication) ECM detects malfunction in starter motor drive circuit of the IPDM E/R. IPDM E/R

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Start the engine and wait at least 5 minutes.
  3. Repeat step 1 and 2 for 20 times.
  4. Check DTC.

Is DTC detected? YES >> Proceed to EC-404, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK SELF-DIAGNOSTIC RESULT IN BCM

Check self-diagnostic result in BCM. With CONSULT


Check self-diagnostic result in BCM.

Are any DTC detected? YES >> Check the DTC. Refer to BCS-49, "DTC Index" (with intelligent key), BCS-109, "DTC Index" (without intelligent key).

NO >> GO TO 2.

2.CHECK SELF-DIAGNOSTIC RESULT IN IPDM E/R

Check self-diagnostic result in IPDM E/R. With CONSULT


Check self-diagnostic result in IPDM E/R.

Are any DTC detected? YES >> Check the DTC. Refer to PCS-20, "DTC Index" (with intelligent key), PCS-48, "DTC Index" (without intelligent key).

NO >> GO TO 3.

3.PERFORM DTC CONFIRMATION PROCEDURE

  1. Erase DTC.
  2. Perform DTC confirmation procedure again. Refer to EC-404, "DTC Logic".
  3. Check DTC.

Is the P1652 displayed again? YES >> GO TO 4.

NO >> INSPECTION END

4.CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to GI-39, "Intermittent Incident".

Is the inspection result normal? YES >> Replace IPDM E/R. Refer to PCS-58, "Removal and Installation".

NG >> Repair or replace error-detected parts.

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