Inspection Procedure

1. Remove the steering pad switch assy.
   Fig 1: Inspecting Steering Pad Switch Assy

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance between terminal 4 (DIST) and 6 (ECC) of steering pad switch assy connector when distance control switch is operated.

   Standard: 

   RESISTANCE SPECIFICATIONS
   
   

   Switch position	Specified value
   Distance control switch is ON	Below 1 Ω
   Distance control switch is OFF	10 kΩ or higher

HINT:

When a malfunction is detected in the distance control switch, replace the steering pad switch assy.

1. NG: REPLACE STEERING PAD SWITCH ASSY  (See REPLACEMENT )
2. OK: Go to next step. 

1. Disconnect the spiral cable sub-assy connector.
   Fig 2: Disconnecting Spiral Cable Sub-Assy Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance between terminal A and C13 of spiral cable sub-assy.

   Standard: 

   RESISTANCE SPECIFICATIONS
   
   

   Terminal No.	Specified value
   A-4 - C13-11	Below 1 Ω
   A-6 - C13-2	Below 1 Ω

1. NG: REPLACE SPIRAL CABLE SUB-ASSY 
2. OK: Go to next step. 

1. Check for an open or short circuit in harness and connector between the distance control ECU and the spiral cable sub-assy (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

1. NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 
2. OK: Go to next step. 

1. Check for an open or short circuit in harness and connector between the spiral cable sub-assy and body ground (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

1. NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 
2. OK: Go to next step. 

1. Remove the cruise control ECU (distance control ECU) with the connector.
   Fig 3: Identifying Cruise Control ECU Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch to the ON position.
3. Measure the voltage between terminal MODE (D2-16) of the cruise control ECU (distance control ECU) and body ground, when distance control switch is operated.

   Standard: 

   VOLTAGE SPECIFICATIONS
   
   

   Switch position	Specified value
   Distance control switch is ON	Below 1 V
   Distance control switch is OFF	10 to 14 V

1. NG: REPLACE CRUISE CONTROL ECU ASSY  (See REPLACEMENT )
2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON  PROBLEM SYMPTOMS TABLE