Cruise Control Switch Circuit: Procedure

Fig 1: Identifying Cruise Control Main Switch (ON-OFF, CANCEL, - SET, + RES, and MODE)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Radar Cruise / Data List.
5. Check the Data List for proper functioning of the cruise control main switch.
   TEXT IN ILLUSTRATION
   
   

   *1	ON-OFF
   *2	CANCEL
   *3	-SET
   *4	+RES
   *5	MODE

   RADAR CRUISE
   
   

   Techstream Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   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 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 the cruise control main switch is operated, the display changes as shown above.

NG → See step   2 

OK → See step   7 

1. Remove the cruise control main switch. Refer to REMOVAL .
   Fig 2: Identifying Cruise Control Main Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected: (Cruise Control Main Switch)	*2	ON-OFF
   *3	CANCEL	*4	-SET
   *5	+RES	*6	MODE

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A-1 (ECC) - A-2 (R/N) A-1 (ECC) - A-3 (CCS)	Main switch off	1 MΩ or higher
   A-1 (ECC) - A-3 (CCS)	Main switch on	Below 2.5 Ω
   A-1 (ECC) - A-2 (R/N)	MODE	Below 2.5 Ω
   A-1 (ECC) - A-3 (CCS)	+ RES	235 to 245 Ω
   A-1 (ECC) - A-3 (CCS)	- SET	617 to 643 Ω
   A-1 (ECC) - A-3 (CCS)	CANCEL	1509 to 1571 Ω

3. Remove the cruise control main switch. Refer to INSTALLATION .

NG → See step   8 

OK: Go to next step 

1. Disconnect the cruise control switch wire connector from the spiral cable and cruise control main switch.
   Fig 3: Cruise Control Switch Wire Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-1 (ECC) - z9-4 (ECC)	Always	Below 1 Ω
   A-2 (R/N) - z9-1 (R/N)	Always	Below 1 Ω
   A-3 (CCS) - z9-3 (CCS)	Always	Below 1 Ω

3. Reconnect the cruise control switch wire connector.
   TEXT IN ILLUSTRATION
   
   

   *1	Cruise control switch wire: (to Spiral Cable Sub-assembly)
   *2	Cruise control switch wire: (to Cruise Control Main Switch)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

HINT: 

• Removal. Refer to REMOVAL
• Installation. Refer to INSTALLATION

1. Remove the spiral cable sub-assembly. Refer to REMOVAL .
   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected: (Spiral Cable Sub-assembly)

   Fig 4: z9 & F40 Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z9-1 (R/N) - F40-7 (R/N)	The spiral cable position is center	Below 1 Ω
   	The spiral cable position is 2.5 rotations to the left
   	The spiral cable position is 2.5 rotations to the right
   z9-3 (CCS) - F40-1 (CCS)	The spiral cable position is center	Below 1 Ω
   	The spiral cable position is 2.5 rotations to the left
   	The spiral cable position is 2.5 rotations to the right
   z9-4 (ECC) - F40-2 (ECC)	The spiral cable position is center	Below 1 Ω
   	The spiral cable position is 2.5 rotations to the left
   	The spiral cable position is 2.5 rotations to the right

   HINT: 

   The spiral cable makes a maximum of approximately 5 rotations.

3. Install the spiral cable sub-assembly. Refer to INSTALLATION .

NG → See step   9 

OK: Go to next step 

1. Disconnect the ECM connectors.
   Fig 5: F40 & A43 Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F40-1 (CCS) - A43-45 (CCS)	Always	Below 1 Ω
   F40-7 (R/N) - A43-37 (CCHG)	Always	Below 1 Ω
   F40-1 (CCS) - Body ground	Always	10 kΩ or higher
   F40-7 (R/N) - Body ground	Always	10 kΩ or higher
   F40-2 (ECC) - Body ground	Always	Below 1 Ω

3. Reconnect the ECM connector.
   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector: (to Spiral Cable Sub-assembly)
   *2	Front view of wire harness connector: (to ECM)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   6