Terminals Of Ecu
WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK MAIN BODY ECU
- Disconnect the J2, J3, J4, DA, DB, DC and DD ECU connectors.
- Measure the voltage and resistance according to the value(s) in the table below.CHECK MAIN BODY ECU VOLTAGE AND RESISTANCE
Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition DB-13 (BECU) - Body ground GR - Body ground BECU power supply Always 11 to 14 V DA-1 (ACC) - Body ground B - Body ground ACC power supply Always 11 to 14 V DA-1 (IG) - Body ground B - Body ground IG power supply Always 11 to 14 V DA-1 (TRLY) - Body ground B - Body ground Taillight power supply Always 11 to 14 V DD-62 (GND1) - Body ground W-B - Body ground Body ground Always Below 1 Ω DD-62 (GND2) - Body ground W-B - Body ground Body ground Always Below 1 Ω J4-24 (DCTY) - Body ground BR - Body ground Front door courtesy light switch LH signal Front door LH open Below 1 Ω J4-24 (DCTY) - Body ground BR - Body ground Front door courtesy light switch LH signal Front door LH closed 10 kΩ or higher J3-21 (PCTY) - Body ground O - Body ground Front door courtesy light switch RH signal Front door RH open Below 1 Ω J3-21 (PCTY) - Body ground O - Body ground Front door courtesy light switch RH signal Front door RH closed 10 kΩ or higher DC-2 (LCTY) - Body ground B - Body ground Rear door courtesy light switch LH signal Rear door LH open Below 1 Ω DC-2 (LCTY) - Body ground B - Body ground Rear door courtesy light switch LH signal Rear door LH closed 10 kΩ or higher J3-25 (RRCY) - Body ground L - Body ground Rear door courtesy light switch RH signal Rear door RH open Below 1 Ω J3-25 (RRCY) - Body ground L - Body ground Rear door courtesy light switch RH signal Rear door RH closed 10 kΩ or higher J4-23 (TAIL) - Body ground O - Body ground Light control switch TAIL signal Light control switch TAIL Below 1 Ω J4-23 (TAIL) - Body ground O - Body ground Light control switch TAIL signal Light control switch except TAIL 10 kΩ or higher J3-17 (HEAD) - Body ground W - Body ground Light control switch HEAD signal Light control switch HEAD Below 1 Ω J3-17 (HEAD) - Body ground W - Body ground Light control switch HEAD signal Light control switch except HEAD 10 kΩ or higher J4-21 (A) - Body ground G - Body ground Light control switch AUTO signal Light control switch AUTO Below 1 Ω J4-21 (A) - Body ground G - Body ground Light control switch AUTO signal Light control switch except AUTO 10 kΩ or higher J3-28 (FFOG) - Body ground P - Body ground Front fog light switch signal Front fog light switch ON Below 1 Ω J3-28 (FFOG) - Body ground P - Body ground Front fog light switch signal Front fog light switch OFF 10 kΩ or higher J2-4 (HAZ) - Body ground O - Body ground Hazard warning signal switch input signal Hazard warning signal switch ON Below 1 Ω J2-4 (HAZ) - Body ground O - Body ground Hazard warning signal switch input signal Hazard warning signal switch OFF 10 kΩ or higher J3-9 (CGSW) - Body ground BR - Body ground Cargo light switch signal Cargo light switch ON Below 1 Ω J3-9 (CGSW) - Body ground BR - Body ground Cargo light switch signal Cargo light switch DOOR 10 kΩ or higher J3-9 (CGSW) - Body ground BR - Body ground Cargo light switch signal Cargo light switch OFF 10 kΩ or higher If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the J2, J3, J4, DA, DB, DC and DD ECU connectors.
- Measure the voltage according to the value(s) in the table below.CHECK MAIN BODY ECU VOLTAGE
Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition J4-4 (FFGO) - Body ground SB - Body ground Front fog light signal Light control switch TAIL, front fog light switch ON Below 1 V J4-4 (FFGO) - Body ground SB - Body ground Front fog light signal Light control switch TAIL, front fog light switch OFF 11 to 14 V DB-18 (HRLY) - Body ground L - Body ground Headlight low beam signal Light control switch HEAD, dimmer switch Low Below 1 V DB-18 (HRLY) - Body ground L - Body ground Headlight low beam signal Light control switch HEAD, dimmer switch except Low 11 to 14 V DB-16 (DIM) - Body ground R - Body ground Headlight low beam signal Light control switch HEAD, dimmer switch High Below 1 V DB-16 (DIM) - Body ground R - Body ground Headlight low beam signal Light control switch HEAD, dimmer switch except High 11 to 14 V J2-14 (CGLP) - Body ground LG - Body ground Cargo light signal Cargo light switch OFF Below 1 V J2-14 (CGLP) - Body ground LG - Body ground Cargo light signal Cargo light switch DOOR, door is closed 11 to 14 V J2-14 (CGLP) - Body ground LG - Body ground Cargo light signal Cargo light switch DOOR, door is open Below 1 V J2-14 (CGLP) - Body ground LG - Body ground Cargo light signal Cargo light switch ON Below 1 V If the result is not as specified, the ECU may have a malfunction.