Last Modified: 11-29-2007 1.6 U
Service Category: Vehicle Interior Section: Door Lock
Model Year: 2008 Model: Sequoia Doc ID: RM000002VRE007X
Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: TERMINALS OF ECU (2008 Sequoia)

TERMINALS OF ECU

1. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)



(a) Disconnect the H3, H4, DA, DB, DC and DD ECU connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

DB-13 (BECU) - Body ground

GR - Body ground

+B power source

Always

11 to 14 V

DA-1 (ALTB) - Body ground

B - Body ground

+B power source

Always

11 to 14 V

DD-62 (GND1,GND2) - Body ground

W-B - Body ground

Power ground

Always

Below 1 Ω

H4-24 (DCTY) - Body ground

BR - Body ground

Driver door courtesy switch

Driver door CLOSED → OPEN

10 kΩ or higher → Below 1 Ω

H3-21 (PCTY) - Body ground

O - Body ground

Front passenger door courtesy switch input

Front passenger door CLOSED → OPEN

10 kΩ or higher → Below 1 Ω

DC-2 (LCTY) - Body ground

G - Body ground*1

B - Body ground*2

Rear left door courtesy switch input

Rear left door CLOSED → OPEN

10 kΩ or higher → Below 1 Ω

H3-25 (RRCY) - Body ground

L - Body ground

Rear right door courtesy switch input

Rear right door CLOSED → OPEN

10 kΩ or higher → Below 1 Ω

DD-49 (L1) - Body ground

R - Body ground

Door control switch LOCK input

Front door control switch RH OFF → LOCK

10 kΩ or higher → Below 1 Ω

DD-40 (UL1) - Body ground

W - Body ground

Front door control switch RH UNLOCK input

Front door control switch RH OFF → UNLOCK

10 kΩ or higher → Below 1 Ω

HINT:

  • *1: w/ Rear Power Seat
  • *2: w/o Rear Power Seat

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

(c) Reconnect the H3, H4, DA, DB, DC and DD ECU connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

H4-9 (LSWD) - Body ground

P - Body ground

Front door unlock detection switch LH input

Front door LH UNLOCK

Below 1 V

Front door LH LOCK

11 to 14 V (or pulse generation )

H3-27 (LSWP) - Body ground

V - Body ground

Front door unlock detection switch RH input

Front door RH UNLOCK

Below 1 V

Front door RH LOCK

11 to 14 V (or pulse generation )

DC-1 (LSWL) - Body ground

GR - Body ground

Rear door unlock detection switch LH input

Rear door LH UNLOCK

Below 1 V

Rear door LH LOCK

11 to 14 V (or pulse generation )

H3-5 (LSWR) - Body ground

Y - Body ground

Rear door unlock detection switch RH input

Rear door RH UNLOCK

Below 1 V

Rear door RH LOCK

11 to 14 V (or pulse generation )

DD-3 (ACT+) - Body ground

W - Body ground

Door lock motor LOCK drive output

Door control switch or front door key cylinder LH OFF

Below 1 V

Door control switch or front door key cylinder LH LOCK

11 to 14 V

H4-5 (ACTD) - Body ground

P - Body ground

Door lock motor UNLOCK drive output

Door control switch or front door key cylinder LH UNLOCK

11 to 14 V

Door control switch or front door key cylinder LH OFF

Below 1 V

DD-2 (ACT-) - Body ground

L - Body ground

Door lock motor UNLOCK drive output

Door control switch or front door key cylinder LH UNLOCK

11 to 14 V

Door control switch or front door key cylinder LH OFF

Below 1 V

DC-24 (ACT+) - Body ground

W - Body ground

Door lock motor LOCK drive output

Door control switch or front door key cylinder LH OFF

Below 1 V

Door control switch or front door key cylinder LH LOCK

11 to 14 V

DC-23 (ACT-) - Body ground

L - Body ground

Door lock motor UNLOCK drive output

Door control switch or front door key cylinder LH UNLOCK

11 to 14 V

Door control switch or front door key cylinder LH OFF

Below 1 V

DD-53 (L2) - Body ground

V - Body ground

Front door key switch LH LOCK input

Front door key cylinder LH LOCK

Below 1 V

Ignition switch off, all doors closed and front door key cylinder LH neutral position

11 to 14 V (or pulse generation )

H4-10 (UL3) - Body ground

B - Body ground

Front door key switch LH UNLOCK input

Front door key cylinder LH UNLOCK

Below 1 V

Ignition switch off, all doors closed and front door key cylinder LH neutral position

11 to 14 V (or pulse generation )

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

2. CHECK BACK DOOR ECU



(a) Disconnect the V2 and V3 ECU connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

V2-1 (BDR) - Body ground

SB - Body ground

+B power source

Always

11 to 14 V

V2-7 (BECU) - Body ground

GR - Body ground

+B power source

Always

11 to 14 V

V2-6 (GND) - Body ground

W-B - Body ground

Power ground

Always

Below 1 Ω

V3-10 (BDCY) - V3-20 (CTYE)

P - R

Back door courtesy switch

Driver door CLOSED → OPEN

10 kΩ or higher → Below 1 Ω

V3-8 (BKL) - V3-19 (KEYE)

G - O

Tail gate control switch lock input

Back door lock cylinder is turned OFF → LOCK with mechanical key

10 kΩ or higher → Below 1 Ω

V3-7 (BKUL) - V3-19 (KEYE)

LG - O

Tail gate control switch unlock input

Back door lock cylinder is turned OFF → UNLOCK with mechanical key

10 kΩ or higher → Below 1 Ω

V3-15 (HSW+) - V3-24 (HSW-)

B - W

Back door opener switch signal

Back door opener switch OFF → ON

10 kΩ or higher → Below 1 Ω

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

(c) Reconnect the V2 and V3 ECU connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

V3-8 (BKL) - Body ground

G - Body ground

Tail gate control switch lock input

Back door lock cylinder is turned OFF → LOCK with mechanical key

11 to 14 V (or pulse generation ) → Below 1 V

V3-7 (BKUL) - Body ground

LG - Body ground

Tail gate control switch unlock input

Back door lock cylinder is turned OFF → UNLOCK with mechanical key

11 to 14 V (or pulse generation ) → Below 1 V

V3-15 (HSW+) - Body ground

B - Body ground

Back door opener switch signal

Back door opener switch OFF → ON

11 to 14 V (or pulse generation ) → Below 1 V

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