Inspection Procedure

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

   Standard voltage 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester connection	Condition	Specified condition
   MACC - Body ground	Ignition SW ACC	4 to 6 V

Fig 1: Inspecting Navigation Receiver Assembly Wire Harness Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE NAVIGATION RECEIVER ASSEMBLY 

OK: Go to next step. 

1. Disconnect the navigation receiver assembly connector R10.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester connection	Condition	Specified condition
   SGND - TSW-	Always	Below 1 Ω

Fig 2: Identifying Navigation Receiver Assembly Connector R10
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step. 

1. Disconnect the microphone connector T13 and navigation receiver assembly connector R10.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester connection	Condition	Specified condition
   MACC - MACC	Always	Below 1 Ω
   MI1+ - MIC+	Always	Below 1 Ω
   MIC- - MIC-	Always	Below 1 Ω
   MACC - Body ground	Always	10 kΩ or higher
   MIC+ - Body ground	Always	10 kΩ or higher
   MIC- - Body ground	Always	10 kΩ or higher

Fig 3: Identifying Microphone Connector T13 Navigation Receiver Assembly Connector R10
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE