Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT CRUISE CONTROL MAIN SWITCH ASSY
1. Turn the ignition switch off.
2. Disconnect the cruise control main switch connector.
  
  Fig 1: Disconnecting Cruise Control Main Switch Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value(s) in Fig 2 .
  Standard:
  
  Fig 2: Resistance Between Cruise Control Main Switch Assembly Specifications Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPLACE CRUISE CONTROL MAIN SWITCH ASSY (SEE REPLACEMENT )
OK: Go to next step.
INSPECT SPIRAL CABLE SUB-ASSY
1. Disconnect the ECM side spiral cable connector.
  
  Fig 3: Disconnecting ECM Side Spiral Cable Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in Fig 4 .
  Standard:
  
  Fig 4: Resistance Between Spiral Cable Sub-Assy Specifications Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPLACE SPIRAL CABLE SUB-ASSY (SEE SPIRAL CABLE )
OK: Go to next step.
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSY - BODY GROUND)
1. Measure the resistance according to the value(s) in Fig 6 .
  
  Fig 5: Identifying Terminal ECC
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 6: Resistance Between Spiral Cable Sub-Assy & Body Ground Specifications Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSY - BODY GROUND)
  
  OK: Go to next step.
CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSY - ECM)
1. Disconnect the E7 connector of the ECM.
  
  Fig 7: Disconnecting E7 Connector Of ECM
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 8: Wire Harness Connector Front View
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in Fig 9 .
  Standard:
  
  Fig 9: Resistance Between Spiral Cable Sub-Assy & ECM Specifications Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSY - ECM)
  
  OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE PROBLEM SYMPTOMS TABLE )