Pinout Values and Diagnostic Parameters

LIGHTING: LIGHTING SYSTEM: TERMINALS OF ECU

TERMINALS OF ECU

1. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)





(a) Disconnect the 1A, 1F and 1M junction block connectors.
(b) Measure the voltage and resistance between the specified terminals of the wire harness side connectors and body ground.
Standard voltage:






Standard resistance:





If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the 1A, 1F and 1M junction block connectors.
(d) Measure the resistance and voltage between the specified terminals of the junction block connectors and body ground.
Standard resistance:






Standard voltage:









If the result is not as specified, the main body ECU (Instrument panel junction block) may have a malfunction.
HINT: *1: w/ Automatic Light Control
*2: w/ Door Mirror Foot Light
*3: w/ Daytime Running Light
*4: w/o Daytime Running Light
*5: w/ Front Fog Light





(1) Waveform 1





HINT: If the ambient light becomes brighter, width A becomes narrower.