Headlight (HI-BEAM) Circuit: Procedure

1. Check the operation of low beam headlights.

   OK

   Low beam headlights operate normally.

NG → See step   11 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Active Test.
5. Check that the relay operates.
   MAIN BODY
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Head Light HI	High beam headlight relay	ON/OFF	-

   OK

   Relay operates. (High beam headlights illuminate.)

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (w/ Daytime running light system)	B
   NG (w/o Daytime running light system)	C

B → See step   3 

C → See step   6 

A → See step   9 

1. Remove the running light relay from the engine room relay block assembly.
2. Connect the positive (+) lead from the battery to terminal 6 (+B).
   Fig 1: Inspecting Running Light Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Connect the negative (-) lead from the battery to terminal 4 (H).
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   1 (HLOR) - Body ground	Battery voltage not applied	Below 1 V
   5 (HLOL) - Body ground		Below 1 V
   1 (HLOR) - Body ground	Battery voltage applied to terminal 6 (+B) and 4 (H)	11 to 14 V
   5 (HLOL) - Body ground		11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Running Light Relay)

NG → See step   10 

OK: Go to next step 

1. Remove the running light relay from the engine room relay block assembly.
2. Disconnect the 2F instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4 (H) - 2F-20	Always	Below 1 Ω
   2F-20 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the instrument panel junction block assembly.
   Fig 2: Inspecting Instrument Panel Junction Block Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2F-20 - 2I-22 (DIM)	Always	Below 1 Ω
   2F-20 - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Instrument Panel Junction Block Assembly)

NG → REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

OK → See step   9 

1. Remove the DIM (headlight dimmer) relay from the engine room relay block assembly.
   Fig 3: Identifying Headlight Dimmer Relay Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	Battery voltage not applied	10 kΩ or higher
   	Battery voltage applied between terminals 1 and 2	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Headlight Dimmer Relay)

NG → REPLACE HEADLIGHT DIMMER RELAY 

OK: Go to next step 

1. Remove the headlight dimmer relay from the engine room relay block assembly.
2. Disconnect the 2F instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2 (Headlight dimmer relay terminal) - 2F-20	Always	Below 1 Ω
   2F-20 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the instrument panel junction block assembly.
   Fig 4: Inspecting Instrument Panel Junction Block Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2F-20 - 2I-22 (DIM)	Always	Below 1 Ω
   2F-20 - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Instrument Panel Junction Block Assembly)

NG → REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

OK → See step   9