DTC P2102: Throttle Actuator Control Motor Circuit Low; DTC P2103: Throttle Actuator Control Motor Circuit High: Procedure

WARNING: This page is about a different car, the 2009 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT THROTTLE BODY (RESISTANCE OF THROTTLE CONTROL MOTOR)

Disconnect the E17 throttle body connector.

Fig 1: Identifying Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

Tester Connection	Condition	Specified Condition
M+ (E17-2) - M- (E17-1)	20°C (68°F)	0.3 to 100 Ω

Reconnect the throttle body connector.

NG → REPLACE THROTTLE BODY

OK: Go to next step

CHECK HARNESS AND CONNECTOR (THROTTLE CONTROL MOTOR - ECM)

Disconnect the E17 throttle body connector.

Fig 2: Identifying Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the E3 ECM connector.

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

Standard resistance (Check for open)

Tester Connection	Specified Condition
M+ (E17-2) - M+ (E3-2)	Below 1 Ω
M- (E17-1) - M- (E3-1)	Below 1 Ω

Standard resistance (Check for short)

Tester Connection	Specified Condition
M+ (E17-2) or M+ (E3-2) - Body ground	10 kΩ or higher
M- (E17-1) or M- (E3-1) - Body ground	10 kΩ or higher

Reconnect the throttle body connector.
Reconnect the ECM connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT THROTTLE BODY (VISUALLY CHECK THROTTLE VALVE)
1. Check for foreign objects between the throttle valve and the housing.
NG → REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY

OK: Go to next step
INSPECT THROTTLE VALVE
1. Check if the throttle valve opens and closes smoothly.
NG → REPLACE THROTTLE BODY

OK → REPLACE ECM