Inspection Procedure

1. See the input signal check (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).
2. Check the indicator light when the clutch pedal is depressed.

   OK: The indicator light goes off when the clutch pedal is depressed. 

Fig 1: Checking Input Signal Blinking Pattern
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

NG: GO TO NEXT STEP 

1. Turn the ignition switch to ON.
2. Measure the voltage between terminal 4 (D) of the cruise control ECU assembly connector and the body ground when the clutch pedal is depressed and released.

   OK 

   TERMINAL VOLTAGE (D)
   
   

   Clutch Pedal	Voltage
   Clutch pedal depressed	Below 1 V
   Clutch pedal released	10 to 16 V

   Fig 2: Inspecting Terminal Voltage (D)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

NG: GO TO NEXT STEP 

1. Disconnect the clutch switch assembly connector.
2. Check continuity between terminal 1 and 2 of clutch switch assembly.

   OK 

   CLUTCH SWITCH ASSEMBLY
   
   

   Clutch Switch Assembly Position	Specification
   Switch pin free	No continuity
   Switch pin pushed in	Continuity

   Fig 3: Inspecting Clutch Switch Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE CLUTCH SWITCH ASSEMBLY 

OK: GO TO NEXT STEP 

1. Check for open and short circuit in harness and connector between cruise control ECU assembly and gauge fuse (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: CHECK AND REPLACE CRUISE CONTROL ECU ASSEMBLY