Inspection Procedure
WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT RADIO AND NAVIGATION ASSY
- Measure the voltage according to the value(s) in
RADIO AND NAVIGATION ASSY VOLTAGE .
Standard:
RADIO AND NAVIGATION ASSY VOLTAGETester connection Condition Specified condition MUTE - Body ground Turn ignition switch to ACC, Audio system is playing --> Changing mode Above 3.5 V --> Below 1 V - OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
- NG: GO TO NEXT STEP
- Measure the voltage according to the value(s) in
RADIO AND NAVIGATION ASSY VOLTAGE .
- CHECK HARNESS AND CONNECTOR (RADIO AND NAVIGATION ASSY - MULTI-DISPLAY CONTROLLER SUB-ASSY)
- Disconnect the radio and navigation assy connector R14 and multi-display controller sub-assy connector R26.
- Measure the resistance according to the value(s) in
RADIO AND NAVIGATION ASSY - MULTI-DISPLAY CONTROLLER SUB-ASSY RESISTANCE .
Standard:
RADIO AND NAVIGATION ASSY - MULTI-DISPLAY CONTROLLER SUB-ASSY RESISTANCETester connection Condition Specified condition MUTE - LMUT Always Below 1 Ω MUTE - Body ground Always 10 kΩ or higher Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
- OK: GO TO NEXT STEP
- REPLACE MULTI-DISPLAY CONTROLLER SUB-ASSY (SEE
MULTI-DISPLAY CONTROLLER SUB-ASSY
)
- Replace the multi-display controller sub-assy and check if it operates normally.
OK: The navigation system operates normally.
- OK: NORMAL OPERATION
- NG: REPLACE RADIO AND NAVIGATION ASSY (SEE RADIO RECEIVER ASSY )
- Replace the multi-display controller sub-assy and check if it operates normally.