Last Modified: 11-29-2007 1.6 U
Service Category: Vehicle Exterior Section: Wiper/Washer
Model Year: 2008 Model: Sequoia Doc ID: RM000000PJ600PX
Title: WIPER / WASHER: WIPER AND WASHER SYSTEM: TERMINALS OF ECU (2008 Sequoia)

TERMINALS OF ECU

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



(a) Disconnect the DA, DB and DD main body ECU connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

DA-1 - Body ground

B - Body ground

Battery power supply

Always

11 to 14 V

DB-13 (BECU) - Body ground

GR - Body ground

Battery power supply

Always

11 to 14 V

DD-62 (GND1, 2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

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

(c) Reconnect the main body 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

DD-43 - DD-62 (GND1, 2)

LG - W-B

IG power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

H2-10 (LIN2) - DD-62 (GND1, 2)

V - W-B

LIN communication signal

Ignition switch ON

Signal waveform

H2-14 (RWMR) - DD-62 (GND1, 2)

O - W-B

Rear washer motor operation signal

Ignition switch ON and rear washer motor OFF

11 to 14 V

Ignition switch ON and rear washer motor ON

Below 1 V

H3-2 (RWIN) - DD-62 (GND1, 2)

L - W-B

Rear wiper switch signal

Ignition switch ON and rear wiper switch OFF

11 to 14 V

Ignition switch ON and wiper switch LO

Below 1 V

H3-9 (RWON) - DD-62 (GND1, 2)

W - W-B

Rear wiper switch signal

Ignition switch ON and rear wiper switch OFF

11 to 14 V

Ignition switch ON and rear wiper switch HI

Below 1 V

H4-7 (RWSW) - DD-62 (GND1, 2)

Y - W-B

Rear washer switch signal

Ignition switch ON and rear washer switch OFF

11 to 14 V

Ignition switch ON and rear washer switch ON

Below 1 V

DD-23 (HRLY) - DD-62 (GND1, 2)

SB - W-B

Headlight LO signal

Headlight LO switch OFF

11 to 14 V

Headlight LO switch ON

Below 1 V

DB-12 (IG) - DD-62 (GND1, 2)

Y - W-B

Headlight cleaner control relay IG signal

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

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

2. CHECK BACK DOOR ECU



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

(a) Disconnect the V2 and V3 back door ECU connectors.

(b) Measure the resistance and voltage 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

Battery power supply

Always

11 to 14 V

V2-6 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

V2-7 (BECU) - Body ground

GR - Body ground

Battery power supply

Always

11 to 14 V

V2-8 (SIG) - Body ground

Y - Body ground

IG power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

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

LG - O

Tail gate control switch signal

Back door key cylinder turned UNLOCK

Below 1 Ω

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

G - O

Tail gate control switch signal

Back door key cylinder turned LOCK

Below 1 Ω

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

(c) Reconnect the back door ECU connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

V2-16 (MPX1) - V2-6 (GND)

Y - W-B

LIN communication signal

Ignition switch ON

Signal waveform

V2-21 (A UP) - V2-6 (GND)

G - W-B

Back door power window AUTO UP signal

Ignition switch ON and back door power window switch OFF → AUTO UP

Below 1 V → 11 to 14 V

V2-22 (BUP) - V2-6 (GND)

O - W-B

Back door power window UP signal

Ignition switch ON and back door power window switch OFF → UP

Below 1 V → 11 to 14 V

V2-23 (BDN) - V2-6 (GND)

V - W-B

Back door power window DOWN signal

Ignition switch ON and back door power window switch OFF → DOWN

Below 1 V → 11 to 14 V

V2-24 (A DN) - V2-6 (GND)

L - W-B

Back door power window AUTO DOWN signal

Ignition switch ON and back door power window switch OFF → AUTO DOWN

Below 1 V → 11 to 14 V

V3-5 (BDUP) - V2-6 (GND)

O - W-B

Back door power window UP operation signal

Ignition switch ON and back door power window switch OFF → UP

Below 1 V → 11 to 14 V

V3-6 (BDDN) - V2-6 (GND)

P - W-B

Back door power window DOWN operation signal

Ignition switch ON and back door power window switch OFF → DOWN

Below 1 V → 11 to 14 V

V3-1 (WIP-) - V2-6 (GND)

P - W-B

Rear wiper motor operation signal

Ignition switch ON and rear wiper switch LO or HI

Pulse generation

V3-2 (WIP+) - V2-6 (GND)

L - W-B

Rear wiper motor operation signal

Ignition switch ON and rear wiper switch LO or HI

Pulse generation

V3-16 (W) - V2-6 (GND)

R - W-B

Rear wiper reverse position switch signal

Ignition switch ON

Pulse generation

V3-17 (P) - V3-25 (SGND)

V - G

Rear wiper retractable position switch signal

Ignition switch ON

Below 1 V

V3-12 (DSV) - V3-23 (DSG)

LG - SB

Power supply for Hall-IC

Ignition switch ON

11 to 14 V

V3-13 (DS1) - V3-23 (DSG)

L - SB

Back door power window glass position signal

Back door power window operation

Pulse generation

V3-14 (DS2) - V3-23 (DSG)

Y - SB

Back door power window glass position signal

Back door power window operation

Pulse generation

V3-19 (KEYE) - V2-6 (GND)

O - W-B

Ground for Tail gate control switch

Always

Below 1 Ω

V3-23 (DSG) - V2-6 (GND)

SB - W-B

Ground for Hall-IC

Always

Below 1 Ω

V3-25 (SGND) - V2-6 (GND)

G - W-B

Ground for rear wiper reverse position and rear wiper retractable position switch

Always

Below 1 Ω

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

3. CHECK HEADLIGHT CLEANER CONTROL RELAY



(a) Disconnect the relay connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A32-3 (IG) - A32-4 (E)

GR - W-B

IG power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

A32-4(E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

A32-2 (H) - A32-4 (E)

BR - W-B

Headlight cleaner switch and headlight switch operation signal

Headlight cleaner switch OFF

Below 1 V

Headlight switch OFF

Below 1 V

Headlight cleaner switch ON and headlight switch ON

11 to 14 V

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

(c) Reconnect the relay connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A32-6 (PB) - A32-4 (E)

R - W-B

Headlight cleaner motor operation signal

Headlight cleaner motor stopped

11 to 14 V

Headlight cleaner motor operating

Below 1 V

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