Cruise Control Switch Circuit: Procedure

1. Check the Data List for proper functioning of the cruise control switch. Refer to DATA LIST / ACTIVE TEST [09/2012 - ] .
   RADAR CRUISE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Cruise Control Main Switch	Cruise control switch signal (Main CPU) / ON or OFF	ON: Cruise control switch is ON OFF: Cruise control switch is OFF	-
   Cancel Switch	Cancel switch signal / ON or OFF	ON: CANCEL switch ON OFF: CANCEL switch OFF	-
   SET/COAT Switch	-/SET switch signal / ON or OFF	ON: -/SET switch ON OFF: -/SET switch OFF	-
   RES/ACC Switch	+/RES switch signal / ON or OFF	ON: +/RES switch ON OFF: +/RES switch OFF	-

   OK

   When cruise control switch operation is performed, the results are same as above.

NG → See step   2 

OK → See step   6 

1. Remove the cruise control switch. Refer to REMOVAL [09/2012 - ] .
2. Inspect the cruise control switch. Refer to INSPECTION [09/2012 - ] .

NG → See step   7 

OK: Go to next step 

1. Remove the spiral cable sub-assembly. Refer to REMOVAL [09/2012 - ] .
2. Inspect the spiral cable sub-assembly. Refer to INSPECTION [09/2012 - ] .

NG → See step   8 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the z2 spiral cable connector.
2. Disconnect the A cruise control switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   z2-3 - A-3	Always	Below 1 Ω
   z2-4 - A-1	Always	Below 1 Ω
   z2-1 - A-2	Always	Below 1 Ω
   A-3 - Body ground	Always	10 kΩ or higher
   A-1 - Body ground	Always	10 kΩ or higher
   A-2 - Body ground	Always	10 kΩ or higher

NG → See step   9 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L134 spiral cable connector.
2. Disconnect the A33 ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L134-1 (CCS) - A33-27 (CCS)	Always	Below 1 Ω
   L134-8 (R/N) - A33-30 (CCHG)	Always	Below 1 Ω
   L134-2 (ECC) - Body ground	Always	Below 1 Ω
   L134-1 (CCS) - Body ground	Always	10 kΩ or higher
   L134-8 (R/N) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   10