Inspection Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Cruise Control / Data List.
5. Check the Data List for proper functioning of the cruise control main switch.
   Fig 1: Connecting Techstream To DLC3

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   ECM (Cruise control) 

   ECM ITEM RANGE REFERENCE
   
   

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

   OK: When the cruise control main switch is operated, the display changes as shown above. 

   Result 

   DTC RESULT REFERENCE
   
   

   Result	Proceed to
   OK	A
   NG (All items are defective)	B
   NG (1 to 3 items are defective)	C

B: Go to step 2 

C: REPLACE CRUISE CONTROL MAIN SWITCH  (See REMOVAL  )

A: 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: Identifying Cruise Control Main Switch Without Harness

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Switch Condition	Specified Condition
   A-3 (CCS) - A-1 (ECC)	Neutral	10 kΩ or higher
   A-3 (CCS) - A-1 (ECC)	+ (ACCEL)/RES (RESUME)	235 to 245 Ω
   A-3 (CCS) - A-1 (ECC)	- (COAST)/SET	620 to 640 Ω
   A-3 (CCS) - A-1 (ECC)	CANCEL	1510 to 1570 Ω
   A-3 (CCS) - A-1 (ECC)	Main switch on	Below 1 Ω

3. Reinstall the cruise control main switch.

NG: REPLACE CRUISE CONTROL MAIN SWITCH  (See REMOVAL  )

OK: Go to Next Step 

1. Disconnect the z1 connector from the spiral cable.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   A-3-Z1-3	Always	Below 1 Ω
   A-1-z1-4	Always	Below 1 Ω

3. Reconnect the spiral cable connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 3: Identifying Z1 Connector Of 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 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Spiral Cable Position	Specified Condition
   z1-3(CCS) - H54-1 (CCS)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   z1-4(ECC) - H54-2 (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.

3. Reinstall the spiral cable.

NG: REPLACE SPIRAL CABLE  (See REMOVAL )

Fig 4: Identifying Z1 Connector Terminal And H54 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the A27 connector from the ECM.
2. Disconnect the H54 connector from the spiral cable.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   H54-1(CCS) - A27-45 (CCS)	Always	Below 1 Ω
   A27-45 (CCS) - Body ground	Always	10 kΩ or higher
   H54-2 (ECC) - Body ground	Always	Below 1 Ω

4. Reconnect the ECM and spiral cable connector.

   Result 

   DTC RESULT REFERENCE
   
   

   Result	Proceed to
   NG	A
   OK (for 2UZ-FE)	B
   OK (for 3UR-FE)	C

B: REPLACE ECM  (See REMOVAL )

C: REPLACE ECM  (See REMOVAL )

Fig 5: Identifying A27 Connector Terminal And H54 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: REPAIR OR REPLACE HARNESS OR CONNECTOR