Inspection Procedure

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

   Hybrid vehicle control ECU 

   DIAGNOSTIC CHART
   
   

   Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
   MAIN SW (MAIN)	Cruise control main switch signal (Main CPU) / ON or OFF	ON: Cruise control main switch ON-OFF button is pushed on OFF: Cruise control main switch ON-OFF button is pushed off	-
   MAIN SW (SUB)	Cruise control main switch signal (Sub CPU) / ON or OFF	ON: Cruise control main switch ON-OFF button is pushed on OFF: Cruise control main switch ON-OFF button is pushed off	-
   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 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 HYBRID VEHICLE CONTROL ECU 

NG : GO TO NEXT STEP 

1. Measure the voltage of the connector.

   Standard voltage 

   VOLTAGE SPECIFICATION CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   H14-13 (CCS) - Body ground	Cruise control main switch off	10 to 14V
   	+/RES	6.6 to 10.1 V
   	-/SET	4.5 to 7.1 V
   	CANCEL	2.3 to 4.0 V
   	Cruise control main switch on	Below 1 V

Fig 1: Checking Hybrid Vehicle Control ECU

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 H14 ECU connector.
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   STANDARD RESISTANCE CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   H14-13 (CCS) - Body ground	Neutral	10 kΩ or higher
   	+/RES	210 to 270 Ω
   	-/SET	560 to 700 Ω
   	CANCEL	1,380 to 1,700 Ω
   	Cruise control main switch on	Below 1 Ω

Fig 2: Inspecting Cruise Control Main Switch Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE HYBRID VEHICLE CONTROL ECU 

NG : GO TO NEXT STEP 

1. Measure the resistance of the switch.

   Standard resistance 

   STANDARD RESISTANCE CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   1 - 3	+/RES	210 to 270 Ω
   	-/SET	560 to 700 Ω
   	CANCEL	1,380 to 1,700 Ω
   	Cruise control main switch on	Below 1 Ω
   	Cruise control main switch off	10 kΩ or higher

NG : REPLACE CRUISE CONTROL MAIN SWITCH 

Fig 3: Inspecting Cruise Control Main Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP 

1. Disconnect the spiral cable connector.
2. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   STANDARD RESISTANCE CHART
   
   

   Tester Connection	Specified Condition
   A-3 - B-1	Below 1 Ω
   A-4 - B-3

Fig 4: Measuring Resistance At Wire Harness Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK : GO TO NEXT STEP 

1. Disconnect the spiral cable connector.
2. Measure the resistance of the cable.

   Standard resistance 

   STANDARD RESISTANCE CHART
   
   

   Tester Connection	Specified Condition
   A-3 - C12-1	Below 1 Ω
   A-4 - C12-2

Fig 5: Measuring Resistance Of Spiral Cable Sub-Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE SPIRAL CABLE SUB-ASSEMBLY 

OK : GO TO NEXT STEP 

1. Disconnect the C12 cable connector.
2. Disconnect the H14 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   STANDARD RESISTANCE CHART
   
   

   Tester Connection	Specified Condition
   C12-1 - H14-13 (CCS)	Below 1 Ω
   C12-2 - Body ground

Fig 6: Checking Wire Harness And Connectors (Spiral Cable - ECU And Body Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

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