LIGHTING (EXT) LIGHTING SYSTEM TERMINALS OF ECU
CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
*1 | Main Body ECU (Multiplex Network Body ECU) | - | - |
Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.
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.
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.
Reconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.
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.
CHECK COMBINATION METER ASSEMBLY
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