Inspection Procedure

1. Disconnect the cruise control main switch connector.
2. Measure resistance between terminal 1 and 3 of the cruise control switch connector when cruise control main switch is operated.

   Resistance 

   CRUISE CONTROL MAIN SWITCH (1 OF 2)
   
   

   Switch condition	Resistance (Ω)
   Neutral	infinity (No continuity)
   +/RES	210 to 270
   -/SET	560 to 700
   CANCEL	1,380 to 1,700

3. Check continuity between terminals 1 and 3 of cruise control main switch connector when main switch button is held on and off.

   Resistance 

   CRUISE CONTROL MAIN SWITCH (2 OF 2)
   
   

   Switch condition	Tester Connection	Specification
   OFF	1 - 3	No continuity
   ON	1 - 3	Continuity

   Fig 1: Inspecting Cruise Control Main Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE CRUISE CONTROL MAIN SWITCH 

OK: GO TO NEXT STEP 

1. Check for open and short circuit in harness and connector between cruise control main switch side terminal 1 and ECM side terminal 4 (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).
2. Check for open and short circuit in harness and connector between cruise control main switch side terminal 3 and ECM side terminal 5 (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).

Fig 2: Inspecting Steering Pad Switch LH

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE STEERING PAD SWITCH LH 

OK: GO TO NEXT STEP 

1. Remove the ECM with connector.
2. Ignition switch ON.
3. Measure voltage between terminal CCS of ECM and body ground, when cruise control main switch is operated.

   Voltage 

   ECM
   
   

   Switch position	Voltage
   Neutral	10 to 14 V
   CANCEL	6.6 to 10.1 V
   -/SET	4.5 to 7.1 V
   +/RES	2.3 to 4 V
   Main switch ON	Below 1 V

   Fig 3: Inspecting ECM

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ECM 

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