Inspection Procedure

HINT:

In case of using the LEXUS hand-held tester, start the inspection from step 1 and in case of not using the LEXUS hand-held tester, start from step  2.

1. Check cruise control switch using LEXUS hand-held tester. 

   PREPARATION: 

   Connect the LEXUS hand-held tester to the DLC3.

   CHECK: 

   Check the cruise control switch using DATA LIST.

   1. OK : Proceed to next circuit inspection shown on problem symptom table (See  PROBLEM SYMPTOMS TABLE  ). 
   2. NG : Go to Next Steps. 
2. Check voltage between terminals CCS of ECM connector and body ground. 

   PREPARATION: 

   1. Remove the ECM with the connector still connected.
   2. Turn the ignition switch ON.

   CHECK: 

   Measure voltage between terminals CCS of ECM connector and body ground, when each of the SET/COAST, RESUME/ ACCEL and CANCEL is turned ON.

   VOLTAGE SPECIFICATION
   
   

   Switch position	Voltage (V)
   Neutral	10 - 16 V
   RES/ACC	2.4 - 3.8 V
   SET/COAST	4.7 - 6.9 V
   CANCEL	6.9 - 9.8 V

   Fig 1: Measuring Voltage Between Terminals CCS Of ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK : Proceed to next circuit inspection shown in problem symptoms table (See  PROBLEM SYMPTOMS TABLE  ). 
   2. NG : Go To next Steps. 
3. Check control switch continuity. 

   PREPARATION: 

   1. Remove the steering wheel center pad.
   2. Disconnect the control switch connector.

   CHECK: 

   Measure resistance between terminals 4 and 5 of the control switch connector when the control switch is operated.

   RESISTANCE SPECIFICATION
   
   

   Switch position	Resistance (Ω)
   Neutral	"INFINITY" (No continuity)
   CRUISE	0 (Continuity)
   RES/ACC	220 - 260
   SET/COAST	600 - 660
   CANCEL	1,500 - 1,600

   Fig 2: Measuring Resistance Between Terminals 4 And 5 Of Control Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG : Replace control switch. 
   2. OK : Go To next Steps. 
4. Check MODE switch continuity. 

   PREPARATION: 

   1. Remove steering wheel center pad. (See REMOVAL )
   2. Disconnect the control switch connector.

   CHECK: 

   Check continuity between terminals 4 and 6 of control switch connector when main switch is held ON and OFF.

   SWITCH POSITION SPECIFICATION
   
   

   Switch position	Tester connection	Specified condition
   OFF	-	No continuity
   MODE	4 - 6	Continuity

   Fig 3: Checking Continuity Between Terminals 4 And 6 Of Control Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG : Replace control switch. 
   2. OK : Go To next Steps. 
5. Check wire harness and connector between ECM and cruise control switch, cruise control switch and body ground (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
   1. NG : Repair or replace wire harness or connector. 
   2. OK : Proceed to next circuit inspection shown on problem symptoms table (See  PROBLEM SYMPTOMS TABLE  ).