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Nissan Sentra B18 (2020-2025) Service Manual: P2100 Throttle Control Motor Relay

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P2100

ETC MOT PWR-B1

(Throttle actuator “A” control motor circuit/open)

Diagnosis condition

Engine running at idle

Signal (terminal)

Throttle control motor relay signal

Threshold

ECM detects a voltage of power source for throttle control motor is excessively low

Diagnosis delay time

—

POSSIBLE CAUSE

  • Harness or connectors (Throttle control motor relay circuit is open.)

  • Throttle control motor relay

FAIL-SAFE

Engine Control System

Engine operating condition in fail-safe mode

Fail safe mode

Nissan Sentra Vehicle behavior

Device fix mode

  • This mode fixes the electric IVT motor and the EVT control solenoid valve in the reference position.

  • The intake manifold runner control valve motor is turned OFF (intake manifold runner control valve opens).

Others

ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.

Idle Start/Stop System

When a DTC is detected, the start/stop indicator lamp blinks slowly and the idle start/stop system operation is prohibited.

When ECM detects error while operating the idle start/stop system, ECM restarts the engine.

Confirmation Procedure

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 at idle.

    Witch DTC is detected?

    P2100>>

    GO TO 2.

    P2103>>

    GO TO 3.

  2. PERFORM DTC CONFIRMATION PROCEDURE-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 DTC Diagnosis Procedure.

    NO-1 >>

    To check malfunction symptom before repair: Refer to Intermittent Incident.

    NO-2 >>

    Confirmation after repair: INSPECTION END

  3. PERFORM DTC CONFIRMATION PROCEDURE-DTC P2103

    1. Turn ignition switch ON and wait at least 1 second.

    2. Check DTC.

    Is DTC detected?

    YES >>

    Proceed to DTC Diagnosis Procedure.

    NO-1 >>

    To check malfunction symptom before repair: Refer to Intermittent Incident.

    NO-2 >>

    Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY

    1. Turn ignition switch ON.

    2. Check the voltage between ECM harness connectors.

      +

      −

      Voltage

      (Approx.)

      ECM

      Connector

      Terminal

      Connector

      Terminal

      F25

      128

      E16

      162

      Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    GO TO 2.

  2. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY 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.

      ECM

      IPDM E/R

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F25

      128

      F96

      72

      Existed

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

    Is the inspection result normal?

    YES >>

    Perform the trouble diagnosis for power supply circuit.

    NO >>

    Repair or replace malfunctioning part.

  3. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL

    1. Turn ignition switch OFF.

    2. Check the voltage between ECM harness connectors.

      +

      −

      Condition

      Voltage

      (Approx.)

      ECM

      Connector

      Terminal

      Connector

      Terminal

      F25

      97

      E16

      162

      Ignition switch

      OFF

      0 V

      ON

      Battery voltage

    Is the inspection result normal?

    YES >>

    INSPECTION END

    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.

      ECM

      IPDM E/R

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F25

      97

      F96

      67

      Existed

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

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Repair or replace malfunctioning part.

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