Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT NAVIGATION ECU

Disconnect the navigation ECU connector N3.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Tester connection	Condition	Specified condition
REV - Body ground	Ignition switch is ON, Shift lever is moved to R position.	10 to 14 V
REV - Body ground	Ignition switch is ON. Shift lever is moved to any position except R.	Below 1 V

Fig 1: Identifying Navigation ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE NAVIGATION ECU

NG: Go to Next Step

CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

Disconnect the navigation ECU connector N3 and park/neutral position switch assembly connector P1.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Taster connection	Condition	Specified condition
REV - P1-1	Always	Below 1 Ω
REV - Body ground	Always	10 kΩ or higher

Fig 2: Identifying Navigation ECU & Park/Neutral Position Switch Assembly Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

INSPECT PARK/NEUTRAL POSITION SWITCH

Disconnect the park/neutral position switch connector P1.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Taster connection	Condition	Specified condition
P1-1 - P1-2	Shift lever is moved to R position.	Below 1 Ω
P1-1 - P1-2	Shift lever is moved to any position except R.	10 kΩ or higher

Fig 3: Identifying Park/Neutral Position Switch Connector Terminals

NG: REPLACE PARK/NEUTRAL POSITION SWITCH

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR