Problem Symptoms Table
HINT:
- Before performing verification listed in the table below, check the fuse and relay.
- Methods used to verify the cause of the problem are listed in order of probability in the verification column.
Display function
PROBLEM SYMPTOMS TABLE - NAVIGATION SYSTEM
| Symptom |
Verification |
| Black screen (No image appears on navigation/audio screen). |
- "BLACK SCREEN (NO IMAGE APPEARS ON NAVIGATION AND AUDIO SCREEN)"
- Dimmer signal circuit
- Power source circuit (multi-display)
- Replace multi-display
|
| Illumination for panel switch does not come on with TAIL switch on. |
- "ILLUMINATION FOR PANEL SWITCH DOES NOT COME ON WITH TAIL SWITCH ON"
- Dimmer signal circuit
- Replace multi-display
|
| Display does not dim (Night Screen) with TAIL switch on. |
- "DISPLAY DOES NOT DIM (NIGHT SCREEN) WITH TAIL SWITCH ON"
- Dimmer signal circuit
- Replace multi-display
|
| Power does not turn off (The screen remains on). |
- Power source circuit (multi-display)
- Replace multi-display
|
| Panel switch does not function. |
- "PANEL SWITCH DOES NOT FUNCTION"
- Steering pad switch circuit
- Power source circuit (multi-display)
- Replace multi-display
|
| Touch panel switch does not function. |
- "TOUCH PANEL SWITCH DOES NOT FUNCTION"
- Steering pad switch circuit
- Power source circuit (multi-display)
- Replace multi-display
|
| Screen is distorted. |
- Display signal circuit (navigation ECU - television camera ECU)
- Display signal circuit (television camera ECU - multi-display)
- Replace navigation ECU
- Replace multi-display
|
| Screen flicker or color distortion. |
- "SCREEN FLICKER OR COLOR DISTORTION"
- Display signal circuit (navigation ECU - television camera ECU)
- Display signal circuit (television camera ECU - multi-display)
- Replace navigation ECU
- Replace multi-display
|
| No switches function while vehicle is running |
- Speed signal circuit (multi-display - combination meter assy)
|
Navigation function
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Steering pad function
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Bluetooth function
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002