Cruise Control Switch Circuit [08/2015 - 08/2019]: Procedure

1. Use the Data List to check if the cruise control switch is functioning properly (Refer to DATA LIST / ACTIVE TEST [08/2015 - 08/2019] ).
   CRUISE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Main SW M-CPU	Cruise control switch (Main CPU) / ON or OFF	ON: Cruise control switch on OFF: Cruise control 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

   On screen, each item changes between ON and OFF according to above chart.

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2019] )

Result: 

NG 

See step  2

1. Replace the spiral cable sub-assembly (Refer to REMOVAL [08/2015 - ] ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. If there are any defects as follows, replace the spiral cable sub-assembly with a new one: scratches, cracks, dents or chips on the connector or spiral cable sub-assembly.
3. Check the spiral cable sub-assembly.
   1. Set the spiral cable sub-assembly to the center position (Refer to PROCEDURE - Step 4 ).
   2. Rotate the spiral cable sub-assembly 2.5 times clockwise and measure the resistance according to the value(s) in the table below. Then rotate the spiral cable sub-assembly 5 times counterclockwise and measure the resistance according to the value(s) in the table below.
      NOTE:

      As the spiral cable sub-assembly may break, do not rotate the spiral cable sub-assembly more than the specified amount.

      Standard Resistance

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

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

      Standard Resistance

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

Result: 

NG 

REPLACE SPIRAL CABLE SUB-ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

Result: 

OK 

See step  3

1. Disconnect the z9 spiral cable connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the z10 switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z9-3 (CCS) - z10-3 (CCS)	Always	Below 1 Ω
   z9-4 (ECC) - z10-1 (ECC)
   z9-3 (CCS) - Body ground	Always	10 kΩ or higher
   z9-4 (ECC) - Body ground

Result: 

NG 

REPLACE CRUISE CONTROL SWITCH WIRE 

Result: 

OK 

See step  4

1. Remove the cruise control switch (Refer to REMOVAL [08/2015 - 08/2019] ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   3 (CCS) - 1 (ECC)	Cruise control switch on	Below 2.5 Ω
   	Cruise control switch off	1 MΩ or higher
   	+RES switch held on	235 to 245 Ω
   	-SET switch held on	617 to 643 Ω
   	CANCEL switch held on	1509 to 1571 Ω

Result: 

NG 

REPLACE CRUISE CONTROL SWITCH 

(Refer to REMOVAL [08/2015 - 08/2019] )

Result: 

OK 

See step  5

1. Disconnect the F23 spiral cable connector.
2. Disconnect the F50 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F23-1 (CCS) - F50-11 (CCS)	Always	Below 1 Ω
   F23-2 (ECC) - Body ground
   F23-1 (CCS) - Body ground	Always	10 kΩ or higher

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG	B

Result: 

A 

REPLACE ECM 

(Refer to REMOVAL [08/2015 - ] )

Result: 

B 

REPAIR OR REPLACE HARNESS OR CONNECTOR