High Beam Headlight Circuit [08/2013 - ]: Procedure
- CHECK OPERATION (LOW BEAM HEADLIGHTS)
- Check the operation of the low beam headlights.
OK
Low beam headlights operate normally.
NG → See step 10
OK: Go to next step
- Check the operation of the low beam headlights.
- PERFORM ACTIVE TEST USING TECHSTREAM
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Body Electrical / Main Body / Active Test.
- Check that the high beam headlights illuminate.MAIN BODY
Tester Display Test Part Control Range Diagnostic Note Head Light Hi High beam headlights ON/OFF - OK
High beam headlights illuminate.
NG → See step 3
OK → See step 8
- CHECK HARNESS AND CONNECTOR (H-LP HI MAIN FUSE - RUNNING LIGHT RELAY (DRL))
- Disconnect the running light relay (DRL) connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition Relay terminal 6 (+B) - Body ground Power switch off 11 to 14 V
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY (DRL) - INSTRUMENT PANEL JUNCTION BLOCK AND BODY GROUND)
- Disconnect the 2C instrument panel junction block assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Relay Terminal 4 (H) - 2C-22 Always Below 1 Ω 2C-22 - Body ground Always 10 kΩ or higher Relay Terminal 3 (E) - Body ground Always Below 1 Ω
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY (DRL) - HEADLIGHT ASSEMBLY AND BODY GROUND)
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
LH SIDETester Connection Condition Specified Condition Running light relay (DRL) terminal 5 (HLOL) - A9-2 (HI)*1 Always Below 1 Ω Running light relay (DRL) terminal 5 (HLOL) - A12-2 (HI)*2 Always Below 1 Ω A9-2 (HI)*1 - Body ground Always 10 kΩ or higher A12-2 (HI)*2 - Body ground Always 10 kΩ or higher A9-1 (E)*1 - Body ground Always Below 1 Ω A12-1 (E)*2 - Body ground Always Below 1 Ω RH SIDETester Connection Condition Specified Condition Running light relay (DRL) terminal 1 (HLOR) - A38-2 (HI)*1 Always Below 1 Ω Running light relay (DRL) terminal 1 (HLOR) - A41-2 (HI)*2 Always Below 1 Ω A38-2 (HI)*1 - Body ground Always 10 kΩ or higher A41-2 (HI)*2 - Body ground Always 10 kΩ or higher A38-1 (E)*1 - Body ground Always Below 1 Ω A41-1 (E)*2 - Body ground Always Below 1 Ω - *1: for LED Headlight
- *2: for Halogen Headlight
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- Measure the resistance according to the value(s) in the table below.
- INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
- Remove the instrument panel junction block assembly. Refer to REMOVAL [08/2013 - ]
.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 2C-22 - MB-22 (DIM) Always Below 1 Ω 2C-22 - Body ground Always 10 kΩ or higher TEXT IN ILLUSTRATION*a Component without harness connected
(Instrument Panel Junction Block Assembly)
NG → See step 11
OK: Go to next step
- Remove the instrument panel junction block assembly. Refer to REMOVAL [08/2013 - ]
.
- REPLACE RUNNING LIGHT RELAY (RUNNING LIGHT RELAY (DRL))
- Temporarily replace the running light relay (DRL) with a new or normally functioning one.
- Check that the high beam headlights operate normally.
OK
High beam headlights illuminate.
NG → See step 9
OK → END (RUNNING LIGHT RELAY (DRL) WAS DEFECTIVE)
- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ]
- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [08/2013 - ]
- GO TO PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ]
- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to REMOVAL [08/2013 - ]