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Problem Symptoms Table

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Display function 

PROBLEM SYMPTOMS TABLE - NAVIGATION SYSTEM

Symptom Verification
Black screen (No image appears on navigation/audio screen).
  1. "BLACK SCREEN (NO IMAGE APPEARS ON NAVIGATION AND AUDIO SCREEN)"
  2. Dimmer signal circuit
  3. Power source circuit (multi-display)
  4. Replace multi-display
Illumination for panel switch does not come on with TAIL switch on.
  1. "ILLUMINATION FOR PANEL SWITCH DOES NOT COME ON WITH TAIL SWITCH ON"
  2. Dimmer signal circuit
  3. Replace multi-display
Display does not dim (Night Screen) with TAIL switch on.
  1. "DISPLAY DOES NOT DIM (NIGHT SCREEN) WITH TAIL SWITCH ON"
  2. Dimmer signal circuit
  3. Replace multi-display
Power does not turn off (The screen remains on).
  1. Power source circuit (multi-display)
  2. Replace multi-display
Panel switch does not function.
  1. "PANEL SWITCH DOES NOT FUNCTION"
  2. Steering pad switch circuit
  3. Power source circuit (multi-display)
  4. Replace multi-display
Touch panel switch does not function.
  1. "TOUCH PANEL SWITCH DOES NOT FUNCTION"
  2. Steering pad switch circuit
  3. Power source circuit (multi-display)
  4. Replace multi-display
Screen is distorted.
  1. Display signal circuit (navigation ECU - television camera ECU)
  2. Display signal circuit (television camera ECU - multi-display)
  3. Replace navigation ECU
  4. Replace multi-display
Screen flicker or color distortion.
  1. "SCREEN FLICKER OR COLOR DISTORTION"
  2. Display signal circuit (navigation ECU - television camera ECU)
  3. Display signal circuit (television camera ECU - multi-display)
  4. Replace navigation ECU
  5. Replace multi-display
No switches function while vehicle is running
  1. Speed signal circuit (multi-display - combination meter assy)

Navigation function 

Fig 1: Identifying Navigation Function
G03000423Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Steering pad function 

Fig 2: Identifying Steering Pad Function Chart
G03000424Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Bluetooth function 

Fig 3: Identifying Bluetooth Function Chart
G03000425Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002