Exterior Lighting System

LIGHTING (EXT): LIGHTING SYSTEM: TERMINALS OF ECU

TERMINALS OF ECU

1. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)





(a) Disconnect the 2A and 2F main body ECU (driver side junction block assembly) connectors.
(b) Measure the voltage and resistance according to the value(s) in the table below.

Standard Voltage





Standard Resistance





If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the 2A and 2F main body ECU (driver side junction block assembly) connectors.
(d) Measure the voltage and resistance according to the value(s) in the table below.

Standard Resistance





Standard Voltage









If the result is not as specified, the main body ECU (Driver side junction block assembly) may have a malfunction.




(1) Waveform 1





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

2. CHECK HEADLIGHT LEVELING ECU ASSEMBLY
(a) Disconnect the A40 headlight leveling ECU assembly connector.





(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 A40 headlight leveling ECU assembly connector.
(d) Measure the resistance and voltage according to the value(s) in the table below.

Standard Resistance





Standard Voltage





If the result is not as specified, the headlight leveling ECU assembly may have a malfunction.




(1) Waveform 1





3. CHECK AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)
(a) Disconnect the D44 AFS ECU (headlight swivel ECU assembly) connector.





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

Standard Resistance





Standard Voltage





If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the D44 AFS ECU (headlight swivel ECU assembly) connector.
(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage





If the result is not as specified, the ECU may have a malfunction.




(1) Waveform 1





4. CHECK INNER REAR VIEW MIRROR ASSEMBLY
(a) Disconnect the P3 inner rear view mirror assembly connector.





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

Standard Resistance





Standard Voltage





If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the P3 inner rear view mirror assembly connector.
(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage





If the result is not as specified, the inner rear view mirror assembly may have a malfunction.




(1) Waveform 1