Inspection Procedure: Procedure

WARNING: This page is about a different car, the 2010 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

Disconnect the park/neutral position switch connector.

Fig 1: Inspecting Park/Neutral Position Switch Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure resistance according to the value(s) in the table below when the shift lever is moved to each position.

Standard resistance

Shift Position	Tester Connection	Specified Condition
P	2 - 6 and 4 - 5	Below 1 Ω
Except P	↑	10 kΩ or higher
R	1 - 2	Below 1 Ω
Except R	↑	10 kΩ or higher
N	2 - 9 and 4 - 5	Below 1 Ω
Except N	↑	10 kΩ or higher
D, S, "+" and "-"	2 - 7	Below 1 Ω
Except D, S, "+" and "-"	↑	10 kΩ or higher

NG → REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

OK: Go to next step

INSPECT TRANSMISSION CONTROL SWITCH

Connect the park/neutral position switch connector.

Fig 2: Inspecting Transmission Control Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the transmission control switch connector of shift lock control unit assembly.

Measure resistance according to the value(s) in the table below when the shift lever is moved to each position.

Standard resistance

Shift Position	Tester Connection	Specified Condition
S, "+" and "-"	3 - 7	Below 1 Ω
Except S, "+" and "-"	↑	10 kΩ or higher

NG → REPLACE TRANSMISSION CONTROL SWITCH

OK: Go to next step

CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)

Connect the transmission control switch connector of shift lock control unit assembly.

Fig 3: Checking Park/Neutral Position Switch -- ECM
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Turn the engine switch on (IG) position, and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.

Standard voltage

Shift Position	Tester Connection	Specified Condition
P and N	E4-4 (STAR) - Body ground	Below 1 V
Except P and N	↑	10 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)

Disconnect the ECM connector.

Fig 4: Identifying ECM E4 And A6 Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Turn the engine switch on (IG) position, and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.

Standard voltage

Shift Position	Tester Connection	Specified Condition
P	E4-6 (P) - Body ground	10 to 14 V
Except P	↑	Below 1 V
N	E4-32 (N) - Body ground	10 to 14 V
Except N	↑	Below 1 V
R	E4-8 (R) - Body ground	10 to 14 V *
Except R	↑	Below 1 V
D and S	E4-9 (D) - Body ground	10 to 14 V
Except D and S	↑	Below 1 V
S, "+" and "-"	A6-9 (S) - Body ground	10 to 14 V
Except S, "+" and "-"	↑	Below 1 V

HINT:

*: The voltage will drop slightly due to the turning on of the back up light.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → REPLACE ECM