High Beam Headlight Circuit [06/2018 - 01/2019]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Active Test.
5. Perform the Active Test according to the display on the Techstream.

   Body Electrical > Main Body > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Head Light Hi	High beam headlights	OFF or ON	-

   Body Electrical > Main Body > Active Test 

   Tester Display
   Head Light Hi

   OK

   High beam headlights illuminate.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [06/2018 - 01/2019] 

Result: 

NG 

See step  2

1. Remove the No. 1 integration relay.

   Refer to REMOVAL [06/2018 - 01/2019]

2. Inspect the No. 1 integration relay.

   Refer to INSPECTION [06/2018 - 01/2019]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE NO. 1 INTEGRATION RELAY. Refer to  REMOVAL [06/2018 - 01/2019] 

Result: 

OK 

See step  3

1. Disconnect the 1B No. 1 integration relay connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   1B-9 - Body ground	Always	11 to 14 V
   1B-11 - Body ground	Always	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Disconnect the I85 main body ECU (multiplex network body ECU) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1B-12 - I85-13 (DIM)	Always	Below 1 Ω
   1B-12 or I85-13 (DIM) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [06/2018 - 01/2019] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR