Inspection Procedure

1. Disconnect the hi multi-display connector.
   Fig 1: Identifying Hi Multi-Display Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the z22 navigation ECU connector.
3. Measure the resistance according to the value (s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   z22-8 (VOI-) - h1-10 (IVI-)	Always	Below 1 Ω
   z22-9 (VOI+) - h1-11 (IVI+)	Always	Below 1 Ω
   z22-7 (SLD1-) - h1-9 (ISLD)	Always	Below 1 Ω
   Z22-8 (VOI-) - Body ground	Always	10 kΩ or higher
   z22-9 (VOI+) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying Z22 Navigation ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

1. Disconnect the K47 display connector.
2. Disconnect the U29 amplifier connector.
3. Measure the resistance according to the value (s) in the table below.

   Standard resistance: for CD changer models 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   K47-22 (IVO+) - U29-15 (II1+)	Always	Below 1 Ω
   K47-21 (IVO-) - U29-14 (II1-)	Always	Below 1 Ω
   K47-22 (IVO+) - Body ground	Always	10 kΩ or higher
   K47-21 (IVO-) - Body ground	Always	10 kΩ or higher

   for DVD changer models 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   K47-22 (IVO+) - U29-23 (II1+)	Always	Below 1 Ω
   K47-21 (IVO-) - U29-22 (II1-)	Always	Below 1 Ω
   K47-22 (IVO+) - Body ground	Always	10 kΩ or higher
   K47-21 (IVO-) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying K47 Multi-Display And U29 Stereo Component Amplifier Components
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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