Inspection Procedure

1. CHECK DISTANCE CONTROL ECU (IGB VOLTAGE) 
   1. Disconnect the L1 sensor connector.
   2. Measure the voltage of the wire harness side connector.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L1-5 (IGB) -Body ground	Ignition switch on	10 to 16 V

   Fig 1: Disconnecting L1 Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG:  Go to step  3

   OK: Go to next step. 

2. CHECK WIRE HARNESS (LASER SENSOR - HYBRID CONTROL ECU AND BODY GROUND) 
   1. Disconnect the L1 sensor connector.
   2. Disconnect the H29 hybrid vehicle control ECU connector.
   3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   H29-11 (LGND) - L1-1 (LGND)	Below 1 Ω
   H29-11 (LGND) - Body ground	10 kΩ or higher
   L1 - 2 (SGND) - Body ground	Below 1 Ω

   Fig 2: Checking Wire Harness (Laser Sensor - Hybrid Control ECU And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

3. CHECK WIRE HARNESS (LASER SENSOR - DISTANCE CONTROL ECU) 
   1. Disconnect the L1 sensor connector.
   2. Disconnect the D2 ECU connector.
   3. Measure the resistance of the wire harness side connectors.

Standard resistance 

Fig 3: Checking Wire Harness (Laser Sensor - Distance Control ECU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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