Inspection Procedure

INSPECT NAVIGATION ECU

Voltage

TERMINALS VOLTAGE SPECIFICATION

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: Disconnecting Navigation ECU Connector N3

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.

Fig 2: Disconnecting Navigation ECU Connector N3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Measure the resistance according to the value(s) in the table below.

Resistance

TERMINALS RESISTANCE SPECIFICATION

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

Fig 3: Identifying Park/Neutral Position Switch Assembly Connectors

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR