Distance Control Switch Circuit: Procedure

1. Using the Techstream, read the Data List.
   RADAR CRUISE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Car Dist Time Setting	Vehicle distance time setting condition / SHORT, LONG, MID or NO	Vehicle distance selected by steering pad switch (distance control switch)	-

   OK

   Normal conditions listed above are displayed.

NG → See step   2 

OK → See step   7 

1. Disconnect the z53 and z51 No. 1 switch wire connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z53-4 (DIST) - z51-2 (DIST)	Always	Below 1 Ω
   z53-6 (ECC) - z51-10 (ECC)	Always	Below 1 Ω

NG → REPLACE NO. 1 SWITCH WIRE 

OK: Go to next step 

1. Disconnect the steering pad switch connector from the spiral cable.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   2 (DIST) - 10 (ECC)	Distance control switch on (pushed)	Below 1 Ω
   	Distance control switch off (pushed again)	1 MΩ or higher

NG → See step   8 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the spiral cable and connector for scratches, cracks, dents and chips. If any defects are found, replace the spiral cable with a new one.
2. Check the spiral cable.
   1. Set the spiral cable to the center position. Refer to REMOVAL [01/2012 - ] .
   2. After setting the spiral cable to the center position, rotate the spiral cable 2.5 times clockwise, and measure the resistance according to the value(s) in the table below. Then rotate the spiral cable 5 times counterclockwise, and measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      z53-4 (DIST) - E109-12 (DIST)	Always	Below 1 Ω
      z53-6 (ECC) - E109-2 (ECC)

   3. After setting the spiral cable to the center position, rotate the spiral cable 2.5 times clockwise. Then while rotating the spiral cable 5 times counterclockwise, measure the resistance according to the value(s) in the table below.
      NOTE:

      As the spiral cable may break, do not rotate the spiral cable more than the specified amount.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      z53-4 (DIST) - E109-12 (DIST)	Always	Below 1 Ω
      z53-6 (ECC) - E109-2 (ECC)

NG → See step   9 

OK: Go to next step 

1. Disconnect the E86 distance control ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the E109 spiral cable connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E109-2 (ECC) - Body ground	Always	Below 1 Ω
   E109-12 (DIST) - E86-16 (MODE)	Always	Below 1 Ω
   E109-11 (DIST) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   6