Headlight Dimmer Switch Circuit [08/2019 - ]: Procedure
- READ VALUE USING TECHSTREAM
- Using the Techstream, read the Data List.
Refer to DATA LIST / ACTIVE TEST [08/2019 - ]
MAIN BODYTester Display Measurement Item/Range Normal Condition Diagnostic Note Dimmer SW Headlight dimmer switch High position signal / OFF or ON OFF: Headlight dimmer switch not in High position
ON: Headlight dimmer switch in High position- Passing Light SW Headlight dimmer switch Flash position signal / OFF or ON OFF: Headlight dimmer switch not in Flash position
ON: Headlight dimmer switch in Flash position- Front Fog Light SW Fog light switch front position signal OFF: Fog light switch off
ON: Fog light switch in front position- Auto Light SW Light control switch Auto position signal OFF: Light control switch not in Auto position
ON: Light control switch in Auto position- Head Light SW (Head) Light control switch Head position signal OFF: Light control switch not in Head position
ON: Light control switch in Head position- Head Light SW (Tail) Light control switch Tail position signal OFF: Light control switch not in Tail position
ON: Light control switch in Tail position- OK
Normal conditions listed above are displayed.
Result
Proceed to OK NG
Result:
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [08/2019 - ]
Result:
NG
See step 2
- Using the Techstream, read the Data List.
- INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY
- Remove the headlight dimmer switch assembly.
Refer to REMOVAL [08/2017 - ]
- Inspect the headlight dimmer switch assembly.
Refer to INSPECTION [08/2019 - ]
Result
Proceed to OK NG
Result:
NG
REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY. Refer to REMOVAL [08/2017 - ]
Result:
OK
See step 3
- Remove the headlight dimmer switch assembly.
- CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH ASSEMBLY - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] AND BODY GROUND)
- Disconnect the H11 headlight dimmer switch assembly connector.
- Disconnect the H133 main body ECU (multiplex network body ECU) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition H11-17 (HF) - H133-10 (HF) Always Below 1 Ω H11-11 (HU) - H133-24 (HU) Always Below 1 Ω H11-18 (T) - H133-22 (TAIL) Always Below 1 Ω H11-20 (H) - H133-12 (HEAD) Always Below 1 Ω H11-19 (A) - H133-8 (A) Always Below 1 Ω H11-4 (BFG) - H133-26 (FFOG) Always Below 1 Ω H11-12 (EL) - Body ground Always Below 1 Ω H11-3 (LFG) - Body ground Always Below 1 Ω H11-17 (HF) or H133-10 (HF) - Body ground Always 10 kΩ or higher H11-11 (HU) or H133-24 (HU) - Body ground Always 10 kΩ or higher H11-18 (T) or H133-22 (TAIL) - Body ground Always 10 kΩ or higher H11-20 (H) or H133-12 (HEAD) - Body ground Always 10 kΩ or higher H11-19 (A) or H133-8 (A) - Body ground Always 10 kΩ or higher H11-4 (BFG) or H133-26 (FFOG) - 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 [08/2019 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR