Inspection Procedure

1. Check the DATA LIST for proper functioning of the cruise control main switch.

   ECM (cruise control) 

   ITEM MEASUREMENT NORMAL CONDITION CHART
   
   

   Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
   MAIN SW (SUB)	Cruise main switch signal (Sub CPU) / ON or OFF	ON: Cruise control main switch is ON (Sub CPU) OFF: Cruise control main switch is OFF (Sub CPU)	-
   MAIN SW (MAIN)	Cruise main switch signal (Main CPU) / ON or OFF	ON: Cruise control main switch is ON (Main CPU) OFF: Cruise control main switch is OFF (Main CPU)	-
   CANCEL SW	CANCEL switch signal / ON or OFF	ON: CANCEL switch ON OFF: CANCEL switch OFF	-
   SET/COAST SW	-/SET switch signal / ON or OFF	ON: -/SET switch ON OFF: -/SET switch OFF	-
   RES/ACC SW	+/RES switch signal/ ON or OFF	ON: +/RES switch ON OFF: +/RES switch OFF	-

   OK: 

   When cruise control main switch operation is performed, the results will be same as above. 

OK: REPLACE ECM 

NG: Go to next step 

Fig 1: Inspecting Cruise Control Main Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the resistance of the switch.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Switch Condition	Specified Condition
   3 (ECC) - 2 (CCS)	+/RES	216 to 264 Ω
   3 (ECC) - 2 (CCS)	-/SET	567 to 693 Ω
   3 (ECC) - 2 (CCS)	CANCEL	1386 to 1694 Ω
   3 (ECC) - 2 (CCS)	Main switch OFF	10 kΩ or higher
   3 (ECC) - 2 (CCS)	Main switch ON	Below 1 Ω

NG: REPLACE CRUISE CONTROL MAIN SWITCH 

OK: Go to next step 

1. Measure the resistance of the spiral cable.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   C10-2 (CCS) - A-2 (CCS)	Below 1 Ω
   C10-3 (ECC) - A-3 (ECC)	Below 1 Ω

NG: REPLACE SPIRAL CABLE SUB-ASSEMBLY 

Fig 2: Identifying C10 Spiral Cable Sub-Assembly Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step 

1. Disconnect the E5 ECM connector.
2. Disconnect the C10 spiral cable connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E5-31 (CCS) - C10-2 (CCS)	Below 1Ω
   E5-31 (CCS) - Body ground	10 kΩ or higher
   C10-2 (CCS) - Body ground	10 kΩ or higher
   C10-3 (ECC) - Body ground	Below 1Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 3: Disconnecting E5 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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