Inspection Procedure

1. Remove the steering pad switch assembly.
   Fig 1: Removing Steering Pad Switch Assembly

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

   Resistance 

   STEERING PAD SWITCH ASSEMBLY
   
   

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

   HINT:

   When a malfunction is found on the distance control switch, replace the steering pad switch assembly.

NG: REPLACE STEERING PAD SWITCH ASSEMBLY 

OK: GO TO NEXT STEP 

1. Check for an open or short circuit in harness and connector between the distance control ECU and the steering pad switch assembly (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Check for an open or short circuit in harness and connector between the steering pad switch assembly and body ground (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Remove the distance control ECU with connector.
2. Ignition switch ON.
3. Measure the voltage between terminal MODE (D2-16) of the distance control ECU and body ground, when distance control switch is operated.

   Voltage 

   DISTANCE CONTROL ECU ASSEMBLY
   
   

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

   Fig 2: Inspecting Distance Control ECU Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE DISTANCE CONTROL ECU ASSEMBLY 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE