Inspection Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the tester on.
4. Enter the following menus: Powertrain / Cruise Control / Data List.
5. According to the display on tester, read the "DATA LIST".
   Fig 1: Turning Ignition Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Cruise control: 

   DATA LIST - CRUISE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   CCS Main SW M-CPU	Main switch signal (Main CPU)/ ON or OFF	ON. Cruise control main switch on OFF Cruise control main switch off	-
   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. - (COAST)/SET switch on OFF: - (COAST)/SET switch off	-
   RES/ACC Switch	+/RES switch signal/ON or OFF	ON. + (ACCEL)/RES (RESUME) switch on OFF + (ACCEL)/RES (RESUME) switch off	-

   OK: 

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

NG: Go to step 2 

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

1. Remove the cruise control main switch (see REMOVAL  ).
2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Checking Cruise Control Main Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATIONS
   
   

   Tester Connection	Switch Condition	Specified Condition
   A-1 (CCS) - A-3 (ECC)	Neutral	10 kΩ or higher
   A-1 (CCS) - A-3 (ECC)	+ (ACCEL)/RES (RESUME)	216 to 264 Ω
   A-1 (CCS) - A-3 (ECC)	- (COAST)/SET	567 to 693 Ω
   A-1 (CCS) - A-3 (ECC)	CANCEL	1386 to 1694 Ω
   A-1 (CCS) - A-3 (ECC)	Main Switch on	Below 1 Ω

NG: REPLACE CRUISE CONTROL MAIN SWITCH  (See REMOVAL  )

OK: Go to next step 

1. Disconnect the connector from the spiral cable.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATIONS
   
   

   Tester connection	Condition	Specified condition
   A-1 - 3	Always	Below 1 Ω
   A-3 - 4	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 3: Checking Harness And Connector (Cruise Control Main Switch - Spiral Cable)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step 

HINT:

• Removal (see REMOVAL )
• Installation (See INSTALLATION )

1. Remove the spiral cable.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATIONS
   
   

   Tester Connection	Spiral Cable Position	Specified Condition
   3 - F5-1 (CCS)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   4 - F5-2 (ECC)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right

   HINT:

   The spiral cable makes a maximum of approximately 5 rotations.

NG: REPLACE SPIRAL CABLE  (See REMOVAL )

Fig 4: Identifying Cruise Control Main Switch Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step 

1. Disconnect the A21 ECM connector.
2. Disconnect the F5 spiral cable connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATIONS
   
   

   Tester Connection	Condition	Specified Condition
   F5-1 - A21-40 (CCS)	Always	Below 1 Ω
   A21-40 (CCS) - Body ground	Always	10 kΩ or higher
   F5-2 (ECC) - Body ground	Always	Below 1 Ω

4. Reconnect the ECM connector.
5. Reconnect the spiral cable connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 5: Identifying A21 ECM And F5 Spiral Cable Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE ECM  (See REMOVAL )