Section 424 (Multi Display): Troubleshooting

WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Troubleshoot the Multi Display according to the table below.
w/ LEXUS Navigation System (See TERMINALS OF ECU )

TROUBLESHOOTING NO

Troubleshooting	No.
Multi display does not operate.	1
Clock loses or gains time.	2
Drive monitor function malfunction.	3
Outer temperature display malfunction.	4
Security indicator does not come on.	See SECURITY INDICATOR CIRCUIT and SECURITY INDICATOR LIGHT CIRCUIT

+/- 1.5 seconds / day

TROUBLESHOOTING NO.1
1. MULTI DISPLAY DOES NOT OPERATE
  1. Check that the battery positive voltage is 10 - 16 V.
    If voltage is not as specified, replace the battery.
  2. Check that the ECU-IG1, ECU-B and ACC fuses are not blown.
    If the fuse is blown, replace the fuse and check for short.
  3. Troubleshoot the multi display as follows.
  HINT
  
  Inspect the connector on the wire harness side.
  
  Fig 1: Identifying Multi Display Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Multi Display Troubleshooting Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TROUBLESHOOTING N0.2
1. 2 CLOCK LOSES OR GAINS TIME
  1. Check that the battery positive voltage is 10 - 16 V.
    If voltage is not as specified, replace the battery.
  2. Inspect the error of the clock.
    Allowable error (per day): +/- 1.5 seconds
    
    If the error exceeds the allowable error, replace the multi display.
  3. Check if the clock adjusting button is sticking in position and has failed to return.
    If the error exceeds the allowable error, replace the multi display.
  4. Troubleshoot the clock as follows.
  HINT:
  
  Inspect the connector on the wire harness side.
  
  Fig 3: Clock Troubleshooting Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TROUBLESHOOTING NO.3
1. 3 DRIVE MONITOR FUNCTION MALFUNCTION
  1. Check that the battery positive voltage is 10 - 16 V.
    If voltage is not as specified, replace the battery.
  2. Troubleshoot the drive monitor function as follows.
  HINT:
  
  Inspect the connector on the wire harness side.
Fig 4: Drive Monitor Troubleshooting Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TROUBLESHOOTING NO.4
1. 4 OUTER TEMPERATURE DISPLAY MALFUNCTION
  1. Check that the battery positive voltage is 10 - 16 V.
    If voltage is not as specified, replace the battery.
  2. Troubleshoot the outer temperature display as follows.
  HINT:
  
  Inspect the connector on the wire harness side.
  
  Fig 5: Outer Temperature Troubleshooting Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002