Headlight (HI-BEAM) Circuit [08/2014 - ]: Procedure

1. Using the Techstream, perform the Active Test. Refer to DATA LIST / ACTIVE TEST [08/2014 - ] .
   MAIN BODY
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Daytime Running Light	Running light relay	ON/OFF	-
   Head Light Hi	Running light relay	ON/OFF	-

   OK

   Running light relay operates (high beam headlights illuminate).

NG → See step   2 

OK → See step   6 

1. Remove the running light relay from the engine room relay block, junction block.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   Running light relay terminal 6 (+B) - Body ground	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Running Light Relay)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the running light relay from the engine room relay block, junction block.
2. Disconnect the 2C and 2D driver side junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   Running light relay terminal 4 (H) - 2D-24	Always	Below 1 Ω
   Running light relay terminal 2 (DRLS) - 2C-37	Always	Below 1 Ω
   Running light relay terminal 3 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   Running light relay terminal 4 (H) or 2D-24 - Body ground	Always	10 kΩ or higher
   Running light relay terminal 2 (DRLS) or 2C-37 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4 

1. Remove the driver side junction block assembly. Refer to REMOVAL [08/2014 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2D-24 - A-22 (DIM)	Always	Below 1 Ω
   2C-37 - A-25 (DRL)	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a

   Component without harness connected (Driver Side Junction Block Assembly)

   -

   -

NG → See step   8 

OK: Go to next step 

1. Replace the running light relay.
2. Check that the daytime running lights operate normally. Refer to OPERATION CHECK [08/2014 - ] .

   OK

   The daytime running lights operate normally.

NG → See step   7 

OK → END (RUNNING LIGHT RELAY WAS DEFECTIVE)