Inspection Procedure

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG) and press Techstream main switch on.
3. Read the Data List according to the displays on the tester.

   Power source control 

   DIAGNOSTIC NOTE CHART
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Start Switch 1	Status of start switch 1 / ON or OFF	ON: Engine switch ON (IG) OFF: Engine switch OFF (IG)	-
   Start Swtich2	Status of start switch 2 / ON or OFF	ON: Engine switch ON (IG) OFF: Engine switch OFF (IG)	-

   OK: "ON" (engine switch on (IG)) appears on the screen 

   Result 

   RESULT CHART
   
   

   Condition	Proceed to
   NG	C
   OK (When troubleshooting according to the PROBLEM SYMPTOM TABLE)	B
   OK (When troubleshooting according to the DTC chart)	A

B : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

C: Go to step 2 

A : REPLACE POWER SOURCE CONTROL ECU 

1. Disconnect the D21 switch connector.
2. Measure the resistance according to the value(s) in the table below.

   Resistance 

   TERMINAL SPECIFIED CONDITION CHART
   
   

   Terminal No. (Symbol)	Switch Condition	Specified value
   D21-2 (SS2) - D21-5 (GND)	Free	10 kΩ or higher
   	Pushed (Hold)	Below 1 Ω
   D21-7 (SS1) - D21-5 (GND)	Free	10 kΩ or higher
   	Pushed (Hold)	Below 1 Ω

   Fig 1: Identifying D21 Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ENGINE SWITCH 

OK: Go to next step 

1. Disconnect the D44 ECU connector.
   Fig 2: Disconnecting D44 ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the D21 Switch connector.
3. Measure the resistance of the wire harness side connectors.

   Resistance 

   TERMINAL SPECIFIED CONDITION CHART
   
   

   Terminal No. (Symbol)	Specified Condition
   D21-7 (SS1) - D44-14 (SSW1)	Below 1 Ω
   D21-2 (SS2) - D44-37 (SSW2)	Below 1 Ω
   D21-5 (GND) - Body ground	Below 1 Ω
   D21-7 (SS1) or D44-14 (SSW1) - Body ground	10 kΩ or higher
   D21-2 (SS2) or D44-37 (SSW2) - Body ground	10 kΩ or higher

   Fig 3: Identifying D21 Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : REPLACE ENGINE SWITCH