Cruise Control Switch Circuit: Procedure

1. Check the Data List for proper functioning of the cruise control main switch.
   CRUISE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   CCS Main SW M-CPU	Cruise control switch signal (Main CPU)/ON or OFF	ON: Cruise control switch is ON OFF: Cruise control switch is OFF	-
   Cancel Switch	Cancel switch signal/ON or OFF	ON: CANCEL switch is ON OFF: CANCEL switch is OFF	-
   SET/COAT Switch	-/SET switch signal/ON or OFF	ON: -/SET switch is ON OFF: -/SET switch is OFF	-
   RES/ACC Switch	+/RES switch signal/ON or OFF	ON: +/RES switch is ON OFF: +/RES switch is OFF	-

   OK

   When cruise control main switch operation is performed, the results are the same as above.

NG → See step   2 

OK → See step   6 

Fig 1: Inspecting Cruise Control Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the cruise control switch.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Switch Condition	Specified Condition
   1 - 3	Cruise control switch ON	Below 1 Ω
   1 - 3	Cruise control switch OFF	10 kΩ or higher
   1 - 3	+/RES switch hold ON	235 to 245 Ω
   1 - 3	-/SET switch hold ON	620 to 640 Ω
   1 - 3	CANCEL switch hold ON	1510 to 1570 Ω

NG → See step   7 

OK: Go to next step 

Fig 2: Identifying Z2 Cruise Control Switch Wire Connector And L134 Cable Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the z2 cruise control switch wire connector.
2. Disconnect the L134 cable connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   z2-3 - L134-1 (CCS)	Always	Below 3 Ω
   z2-4 - L134-2 (ECC)	Always	Below 3 Ω
   z2-3 - Body ground	Always	10 kΩ or higher
   z2-4 - Body ground	Always	10 kΩ or higher

NG → See step   8 

OK: Go to next step 

Fig 3: Inspecting Cruise Control Switch Wire

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the z2 spiral cable connector.
2. Disconnect the A cruise control switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   z2-3 - A-3	Always	Below 1 Ω
   z2-4 - A-1	Always	Below 1 Ω
   A-3 - Body ground	Always	10 kΩ or higher
   A-1 - Body ground	Always	10 kΩ or higher

NG → REPLACE CRUISE CONTROL SWITCH WIRE 

OK: Go to next step 

Fig 4: Identifying L134 Cable And A13 ECM Harness Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L134 cable connector.
2. Disconnect the A13 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L134-1 (CCS) - A13-15 (CCS)	Always	Below 1 Ω
   L134-2 (ECC) - Body ground	Always	Below 1 Ω
   L134-1 (CCS) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   9