LIGHTING (EXT)  LIGHTING SYSTEM  TERMINALS OF ECU  


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


B332798C54
1.76,3.042 2.167,3.26 0.406,0.219 5.438,3.042 5.844,3.26 0.406,0.219 1.76,4.594 2.167,4.813 0.406,0.219 5.49,4.594 5.896,4.813 0.406,0.219 1.427,6.292 1.833,6.51 0.406,0.219 5.042,6.292 5.448,6.51 0.406,0.219 3.281,7.938 3.688,8.156 0.406,0.219 3.688,1.427 4.031,1.427 false 3.604,0.698 3.604,0.417 3.604,0.417 3.792,0.417 false 5.146,1.104 5.146,0.271 5.146,0.271 5.344,0.271 false 0.719,1.885 1.031,2.083 0.313,0.198 10 false 3B 1.448,0.823 1.76,1.021 0.313,0.198 10 false 3D 1.104,0.823 1.417,1.021 0.313,0.198 10 false 3E 0.771,0.823 1.083,1.021 0.313,0.198 10 false 3A 1.813,0.823 2.125,1.021 0.313,0.198 10 false 3C 4.073,1.344 4.417,1.583 0.344,0.24 10 false E31 3.854,0.333 4.083,0.542 0.229,0.208 10 false *1 5.406,0.188 5.74,0.396 0.333,0.208 10 false MB 1.844,3.073 2.188,3.313 0.344,0.24 10 false E31 5.552,3.073 5.896,3.313 0.344,0.24 10 false 3B 1.875,4.625 2.219,4.865 0.344,0.24 10 false 3A 5.615,4.625 5.958,4.865 0.344,0.24 10 false 3E 1.552,6.323 1.896,6.563 0.344,0.24 10 false 3D 5.167,6.323 5.51,6.563 0.344,0.24 10 false 3C 3.385,7.969 3.729,8.208 0.344,0.24 10 false MB
*1 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 on the wire harness side connector according to the value(s) in the table below.

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
3A-43 - Body ground G - Body ground Battery power supply Always 11 to 14 V
3B-1 - Body ground W - Body ground Battery power supply Always 11 to 14 V

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


c.

Measure the resistance on the wire harness side connector according to the value(s) in the table below.

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
3D-12 - Body ground W-B - Body ground Ground Always Below 1 Ω

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 according to the value(s) in the table below.

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
3A-7 - Body ground G - Body ground Clearance light RH drive output Light control switch in tail or head position 11 to 14 V
Light control switch off Below 1 V
3A-8 - Body ground G - Body ground Clearance light LH drive output Light control switch in tail or head position 11 to 14 V
Light control switch off Below 1 V
3E-32 - Body ground G - Body ground Taillights and license plate lights drive output Light control switch in tail or head position 11 to 14 V
Light control switch off Below 1 V
3C-53 - Body ground W - Body ground Taillight relay drive output Light control switch in tail or head position Below 1 V
Light control switch off 11 to 14 V
3D-41 - Body ground* L - Body ground Front fog relay power supply output Light control switch in tail or head position 11 to 14 V
Light control switch off Below 1 V
E31-30 (TAIL) - Body ground W - Body ground Light control switch tail position signal input Light control switch in tail or head position Below 1 V
Light control switch off 11 to 14 V

*: 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 be malfunctioning.