Inspection Procedure

1. Disconnect the L1 laser sensor connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   L1-5 (IGB) - Body ground	Ignition switch on	10 to 14 V

Fig 1: Identifying L1 Laser Sensor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG:  Go to step  3

OK: Go to next step. 

1. Disconnect the E4 connector from the ECM.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   E4-31 (LGND) - L1-1 (LGND)	Always	Below 1 Ω
   L1-1 (LGND) - Body ground	Always	10 kΩ or higher
   L1-2 (SGND) - Body ground	Always	Below 1 Ω

Fig 2: Identifying E4 And L1 ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )

1. Disconnect the D2 distance control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   L1-5 (IGB) - D2-13 (IGB)	Always	Below 1 Ω
   D2-13 (IGB) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying D2 Distance Control And L1 Laser Sensor ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE DISTANCE CONTROL ECU  (See REMOVAL  )