Nissan Sentra B18 (2020-2025) Service Manual: P2101 Electric Throttle Control Function

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Dtc/circuit Diagnosis / P2101 Electric Throttle Control Function

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P2101	ETC FNCTN/CIRC-B1 (Throttle actuator “A” control motor circuit range/performance)	Diagnosis condition	Engine running at idle
		Signal (terminal)	—
		Threshold	Electric throttle control function does not operate properly
		Diagnosis delay time	—

POSSIBLE CAUSE

Harness or connectors
- Throttle control motor circuit is open or shorted.
- Throttle control motor relay circuit is open or shorted.
Electric throttle control actuator

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

CHECK DTC PRIORITY

If DTC P2101 is displayed with DTC P2100 or P2119, first perform the trouble diagnosis for DTC P2100 or P2119.

Is applicable DTC detected?
YES >>
Perform diagnosis of applicable.
- DTC P2100: Refer to DTC Description.
- DTC P2119: Refer to DTC Description.
NO >>
GO TO 2.
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 11 V at idle.

>>
GO TO 3.
PERFORM DTC CONFIRMATION PROCEDURE
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

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

CHECK DTC PRIORITY

If DTC P2101 is displayed with DTC P2100 or P2119, first perform the trouble diagnosis for DTC P2100 or P2119.

Is applicable DTC detected?
YES >>
Perform diagnosis of applicable.
- DTC P2100: Refer to DTC Description.
- DTC P2119: Refer to DTC Description.
NO >>
GO TO 2.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL

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

+		−		Condition		Voltage (Approx.)
ECM
Connector	Terminal	Connector	Terminal
F25	97	E16	162	Ignition switch	OFF	0 V
F25	97	E16	162	Ignition switch	ON	Battery voltage

Is the inspection result normal?

YES >>

GO TO 5.

NO >>

GO TO 3.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.
Disconnect IPDM E/R harness connector.

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

ECM		IPDM E/R		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F25	97	F96	67	Existed

Also check harness for short to ground and to power.

Is the inspection result normal?

YES >>

GO TO 4.

NO >>

Repair or replace malfunctioning part.

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT

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

ECM		IPDM E/R		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F25	128	F96	72	Existed

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.

CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT

Turn ignition switch OFF.
Disconnect electric throttle control actuator harness connector.
Disconnect ECM harness connector.

Check the continuity between electric throttle control actuator harness connector and ECM harness connector.

Electric throttle control actuator		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F7	5	F25	129	Existed
	5		130	Not existed
	6		129	Not existed
	6		130	Existed

Also check harness for short to ground and to power.

Is the inspection result normal?

YES >>

GO TO 6.

NO >>

Repair or replace malfunctioning part.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Remove the intake air duct. Refer to Removal and Installation.
2. Check if foreign matter is caught between the throttle valve and the housing.
Is the inspection result normal?
YES >>
GO TO 7.
NO >>
Remove the foreign matter and clean the electric throttle control actuator inside, then perform throttle valve closed position learning. Refer to Work Procedure.
CHECK THROTTLE CONTROL MOTOR

Check the throttle control motor. Refer to Component Inspection.

Is the inspection result normal?
YES >>
INSPECTION END
NO >>
Replace electric throttle control actuator. Refer to Removal and Installation.

P2100 Throttle Control Motor Relay

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P2103 Throttle Control Motor Relay

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