Cruise Control Switch Circuit: Procedure

1. Check the Data List for proper functioning of the cruise control main switch.
   CRUISE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition
   Main SW M-CPU	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 Switch	CANCEL switch signal / ON or OFF	ON: CANCEL switch ON OFF: CANCEL switch OFF -
   SET/COAST 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 main switch operation is performed, the results will be same as above.

OK → REPLACE ECM 

NG: Go to next step 

Fig 1: Measuring Resistance Of Cruise Control Main Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the resistance of the switch.

   Standard resistance

   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 

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the resistance of the spiral cable.

   Standard resistance

   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 

OK: Go to next step 

Fig 3: E5 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard resistance

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5