Cruise Control Switch Circuit: Procedure

Fig 1: Checking Cruise Control Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Select the following menu items: Powertrain / Cruise Control / Data List.
5. Check the Data List to confirm proper functioning of the cruise control switch.
   TEXT IN ILLUSTRATION
   
   

   *a	ON-OFF
   *b	-/SET
   *c	+/RES
   *d	CANCEL

   CRUISE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Main SW M-CPU	Cruise control switch signal (Main CPU) / ON or OFF	ON: Cruise control switch (ON-OFF button) pushed OFF: Cruise control switch (ON-OFF button) released	-
   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 switch is operated, the display changes as shown above.

NG → See step   2 

OK → See step   7 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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   *1	Cruise Control Switch (ON-OFF button)	-	-
   *a	Component without harness connected (Cruise Control Switch)	*b	ON-OFF
   *c	+/RES	*d	-/SET
   *e	CANCEL	-	-

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   1 - 3	Cruise control switch (ON-OFF button) released	1 MΩ or higher
   	Cruise control switch (ON-OFF button) pushed	Below 2.5 Ω
   	+/RES	235 to 245 Ω
   	-/SET	617 to 643 Ω
   	CANCEL	1509 to 1571 Ω

NG → See step   8 

OK: Go to next step 

1. Disconnect the spiral with sensor cable sub-assembly connector.
   Fig 3: Checking Cruise Control Switch Wire (Spiral Cable Sub-Assembly - Cruise Control Switch)

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

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   z10-3 - Cruise control switch side connector terminal 3	Always	Below 1 Ω
   z10-4 - Cruise control switch side connector terminal 1	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   z10-3 - Body ground	Always	10 Ω or higher
   z10-4 - Body ground	Always	10 Ω or higher

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   *a	Front view of wire harness connector (to Spiral with Sensor Cable Sub-assembly)
   *b	Front view of wire harness connector (to Cruise Control Switch)

NG → REPAIR OR REPLACE CRUISE CONTROL SWITCH WIRE (SPIRAL CABLE SUB-ASSEMBLY - CRUISE CONTROL SWITCH) 

OK: Go to next step 

HINT: 

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

1. Remove the spiral with sensor cable sub-assembly.
   Fig 4: Checking Spiral With Sensor Cable Sub-Assembly

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

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   z10-3 - L52-1 (CCS)	Center	Below 3 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   z10-4 - L52-2 (ECC)	Center	Below 3 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right

3. After setting the spiral with sensor cable sub-assembly to the center position, rotate the spiral with sensor cable sub-assembly 2.5 times clockwise. Then while rotating the spiral with sensor cable sub-assembly 5 times counterclockwise, measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   z10-3 - L52-1 (CCS)	Always	Below 3 Ω
   z10-4 - L52-2 (ECC)	Always	Below 3 Ω

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   *a	Component without harness connected (Spiral with Sensor Cable Sub-assembly)

   HINT: 

   The spiral with sensor cable sub-assembly makes a maximum of approximately 5 rotations.

NG → See step   9 

OK: Go to next step 

1. Disconnect the power management control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   L52-1 (CCS) - L136-22 (CCS)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   L52-1 (CCS) or L136-22 (CCS) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - POWER MANAGEMENT CONTROL ECU) 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 5: Checking L52 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   L52-2 (ECC) - Body ground	Always	Below 1 Ω

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   *a	Front view of wire harness connector (to Spiral with Sensor Cable Sub-assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND) 

OK → See step   10