Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT RADIO RECEIVER ASSY
1. Disconnect the connector from the radio receiver assy.
2. Check continuity between terminals at each condition, as shown in the chart.
  
  Fig 1: Inspecting Radio Receiver Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 2: Tester Connection Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: CHECK AND REPLACE RADIO RECEIVER ASSY
2. NG: GO TO NEXT STEP.
INSPECT STEERING PAD SWITCH RH (AU2, EAU)

Fig 3: Inspecting Steering Pad Switch RH (AU2, EAU)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Check continuity between terminals at each condition, as shown in the chart.
  Standard:
  
  Fig 4: Tester Connection Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: CHECK AND REPLACE STEERING PAD SWITCH RH
2. OK: GO TO NEXT STEP.
INSPECT STEERING PAD SWITCH LH (AU2, EAU)

Fig 5: Inspecting Steering Pad Switch LH (AU2, EAU)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Check continuity between terminals at each condition, as shown in the chart.
  Standard:
  
  Fig 6: Tester Connection Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: CHECK AND REPLACE STEERING PAD SWITCH LH
2. OK: GO TO NEXT STEP.
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSY - RADIO RECEIVER ASSY)
1. Disconnect the spiral cable sub-assy and radio receiver assy.
  1. Check continuity of harness.
    
    Fig 7: Identifying Radio Receiver Assy
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Standard:
    
    Fig 8: Tester Connection Table
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Check short in harness.
    Standard:
    
    Fig 9: Identifying Spiral Cable Side Terminal
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 10: Tester Connection Table
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: GO TO NEXT STEP.
CHECK AND REPLACE SPIRAL CABLE SUB-ASSY
1. OK: NORMAL
2. NG: GO TO NEXT STEP.
  PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE ( PROBLEM SYMPTOMS TABLE )