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Nissan Sentra Service Manual: P2100, P2103 Throttle control motorrelay

Nissan Sentra Service Manual / Engine / Engine control system / Dtc/circuit diagnosis / P2100, P2103 Throttle control motorrelay

DTC Logic

DTC DETECTION LOGIC

DTC No.

CONSULT screen terms (Trouble diagnosis content)

DTC detecting condition

Possible cause

P2100 ETC MOT PWR-B1 (Throttle actuator “A” control motor circuit/ open) ECM detects a voltage of power source for throttle control motor is excessively low.
  • Harness or connectors (Throttle control motor relay circuit is open)
  • Throttle control motor relay
P2103 ETC MOT PWR (Throttle actuator “A” control motor circuit high) ECM detect the throttle control motor relay is stuck ON.
  • Harness or connectors (Throttle control motor relay circuit is shorted)
  • Throttle control motor relay

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.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 8 V.

Witch DTC is detected? P2100 >> GO TO 2.

P2103 >> GO TO 3.

2.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P2100

  1. Turn ignition switch ON and wait at least 2 seconds.
  2. Start engine and let it idle for 5 seconds
  3. Check DTC.

Is DTC detected? YES >> Proceed to EC-423, "Diagnosis Procedure".

NO >> INSPECTION END

3.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P2103

  1. Turn ignition switch ON and wait at least 1 second.
  2. Check DTC.

Is DTC detected? YES >> Proceed to EC-423, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY

  1. Turn ignition switch OFF.
  2. Check the voltage between ECM harness connector and ground.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 3.

NO >> GO TO 2.

2.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT

Disconnect ECM harness connector.

Disconnect IPDM E/R harness connector.

Check the continuity between ECM harness connector and IPDM E/R harness connector.


  1. Also check harness for short to ground.

Is the inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.

NO >> Repair or replace error-detected parts.

3.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL

Check the voltage between ECM harness connector and ground as per the following conditions.

Is the inspection result normal?


Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".

NO >> GO TO 4.

4.CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Disconnect IPDM E/R harness connector.
  4. Check the continuity between ECM harness connector and IPDM E/R harness connector.


  1. Also check harness for short to ground and to power.

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".

NO >> Repair or replace error-detected parts.

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