Inspection Procedure

1. Connect the intelligent tester to the DLC3.
2. Turn the engine switch on (IG) and turn the intelligent tester main switch on.
3. Check the DATA LIST for proper functioning of the cruise control main switch.
   Fig 1: Checking Cruise Control Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   ECM (Cruise control): 

   DATA LIST
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   MAIN SW (MAIN)	Main switch signal (Main CPU)/ ON or OFF	ON: Main switch on OFF: Main switch off	-
   CANCEL SW	CANCEL switch signal/ON or OFF	ON: CANCEL switch on OFF: CANCEL switch off	-
   SET/COAST SW	SET/COAST switch signal/ON or OFF	ON: - (COAST)/SET switch on OFF: - (COAST)/SET switch off	-
   RES/ACC SW	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 

   RESULT
   
   

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

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

C: REPLACE CRUISE CONTROL MAIN SWITCH (See  REMOVAL   ) 

B: Go to Next Step 

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 Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Switch Condition	Specified Condition
   A-1 (CCS) - A-3 (ECC)	Neutral	10 kΩ or higher
   	+ (ACCEL)/RES (RESUME)	216 to 264 Ω
   	- (COAST)/SET	567 to 693 Ω
   	CANCEL	1,386 to 1,694 Ω
   	Main Switch on	Below 1 Ω

NG: REPLACE CRUISE CONTROL MAIN SWITCH (See  REMOVAL   ) 

OK: Go to Next Step 

1. Disconnect the e1 connector from the spiral cable.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester connection	Condition	Specified Condition
   A-1-e1-3	Always	Below 1 Ω
   A-3-e1-4	Always	Below 1 Ω

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

HINT:

• (See REMOVAL )
• (See INSTALLATION )

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

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Spiral Cable Position	Specified Condition
   e1-3 - E30-1 (CCS)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   e1 - 4-E30-2 (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.

Fig 4: Checking Spiral Cable

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPIRAL CABLE  (See REMOVAL )

OK: Go to Next Step 

1. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   E30-1 - A10-40 (CCS)	Always	Below 1 Ω
   A10-40 (CCS) - Body ground	Always	10 kΩ or higher
   E30-2 (ECC) - Body ground	Always	Below 1 Ω

Fig 5: Identifying E30 And A10 Connectors Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ECM  (See REMOVAL )