DTC P2102: Throttle Actuator Control Motor Circuit Low; DTC P2103: Throttle Actuator Control Motor Circuit High [09/2014 - 11/2017]: Procedure

WARNING: This page is about a different car, the 2017 Lexus RC 350, 2017 Lexus RC 300, 2016 Lexus RC 350, 2016 Lexus RC 300, and 2015 Lexus RC 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)

Inspect the throttle body with motor assembly.

Refer to INSPECTION [09/2014 - 11/2017]

HINT:

Perform "Inspection After Repair" after replacing the throttle body with motor assembly.

Refer to INITIALIZATION [09/2014 - 11/2017]

Result

Proceed to
OK
NG

Result:

REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY. Refer to REMOVAL [09/2014 - 10/2015] , or refer to REMOVAL [10/2015 - 11/2017]

Result:

See step 2

CHECK HARNESS AND CONNECTOR (THROTTLE BODY WITH MOTOR ASSEMBLY - ECM)

Disconnect the throttle body with motor assembly connector.
Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
F21-2 (M+) - F2-7 (M+)	Always	Below 1 Ω
F21-1 (M-) - F2-6 (M-)	Always	Below 1 Ω
F21-2 (M+) or F2-7 (M+) - Body ground	Always	10 kΩ or higher
F21-1 (M-) or F2-6 (M-) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 3

INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)

Check for foreign matter between the throttle valve and the housing.

No foreign matter between the throttle valve and housing.

HINT:

Perform "Inspection After Repair" after cleaning the throttle body with motor assembly.

Refer to INITIALIZATION [09/2014 - 11/2017]

Result

Proceed to
OK
NG

Result:

REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY WITH MOTOR ASSEMBLY

Result:

See step 4

INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (THROTTLE VALVE)

Check if the throttle valve opens and closes smoothly.

Throttle valve opens and closes smoothly.

HINT:

Perform "Inspection After Repair" after replacing the throttle body with motor assembly.

Refer to INITIALIZATION [09/2014 - 11/2017]

Result

Proceed to
OK
NG

Result:

REPLACE ECM. Refer to REMOVAL [09/2014 - 11/2017]

Result:

REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY. Refer to REMOVAL [09/2014 - 10/2015] , or refer to REMOVAL [10/2015 - 11/2017]