Terminals of ECU

LIGHTING (EXT): LIGHTING SYSTEM: TERMINALS OF ECU

1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)





(a) Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

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





If the result is not as specified, there may be a malfunction in the wire harness.

(c) Measure the resistance according to the value(s) in the table below.





If the result is not as specified, there may be a malfunction in the wire harness.

(d) Reconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

(e) Measure the voltage and check for pulses according to the value(s) in the table below.









* *1: w/ Daytime Running Light

* *2: w/ Front Fog Light

If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may have a malfunction.

(1) Waveform 1









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

2. CHECK POWER MANAGEMENT CONTROL ECU





(a) Disconnect the A38 power management control ECU connector.

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





If the result is not as specified, there may be a malfunction in the wire harness.