Toyota Sequoia (2005). Manual - part 525

I18633

D22

–

DIAGNOSTICS

MULTIPLEX COMMUNICATION SYSTEM

DI–1895

2089

CLTB (*1) – GND1

(B6–4 – B6–6)

R–G – W–B

Automatic light control sen-

sor (IG)

Ignition switch OFF

Below 1 V

CLTB (*1) – GND1

(B6–4 – B6–6)

R–G – W–B

Automatic light control sen-

sor (IG)

Ignition switch ON

10 to 14 V

(*1): w/ Automatic Light Control
If the result is not as specified, there may be a malfunction on the wire harness side.
2.

CHECK DRIVER DOOR ECU

(a)

Disconnect the D22 ECU connector.

(b)

Measure the resistance or voltage of each terminal of the wire harness side connector.
Standard:

Symbols (Terminals No.)

Wiring Color

Terminal Description

Condition

Specified Condition

SIG (D22–21) – Body ground

B–R – 

Body ground

Ignition power supply

Ignition switch ON

10 to 14 V

CPUB (D22–23) – Body ground

W–R – 

Body ground

+B (BATT) power supply

Always

10 to 14 V

MPX1 (D22–20) – Body ground

G–B – 

Body ground

MPX line

Always

10 k

Ω

 or higher

MPX2 (D22–8) – Body ground

W–L – 

Body ground

MPX line

Always

10 k

Ω

 or higher

BDR (D22–25) – Body ground

L–W – 

Body ground

+B (BATT) power supply

Always

10 to 14 V

GND (D22–13) – 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.

I18633

F18

w/ Driving Position Memory:

DI–1896

–

DIAGNOSTICS

MULTIPLEX COMMUNICATION SYSTEM

2090

3.

CHECK FRONT PASSENGER DOOR ECU

(a)

Disconnect the F18 ECU connector.

(b)

Measure the resistance or voltage of each terminal of the wire harness side connector.
Standard:

Symbols (Terminals No.)

Wiring Color

Terminal Description

Condition

Specified Condition

SIG (F18–21) – Body ground

B–R – 

Body ground

Ignition power supply

Ignition switch ON

10 to 14 V

BDR (F18–25) – Body ground

L–Y – 

Body ground

+B (BATT) power supply

Always

10 to 14 V

MPX1 (F18–20) – Body ground

B – Body ground

MPX line

Always

10 k

Ω

 or higher

MPX2 (F18–8) – Body ground

G–B – 

Body ground

MPX line

Always

10 k

Ω

 or higher

CPUB (F18–23) – Body ground

W–R – 

Body ground

+B (BATT) power supply

Always

10 to 14 V

GND (F18–13) – 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.

I18630

F18

w/o Driving Position Memory:

–

DIAGNOSTICS

MULTIPLEX COMMUNICATION SYSTEM

DI–1897

2091

(a)

Disconnect the F18 ECU connector.

(b)

Measure the resistance or voltage of each terminal of the wire harness side connector.
Standard:

Symbols (Terminals No.)

Wiring Color

Terminal Description

Condition

Specified Condition

SIG (F18–19) – Body ground

B–R – 

Body ground

Ignition power supply

Ignition switch ON

10 to 14 V

BDR (F18–20) – Body ground

L–Y – 

Body ground

+B (BATT) power supply

Always

10 to 14 V

MPX1 (F18–10) – Body ground

B – Body ground

MPX line

Always

10 k

Ω

 or higher

MPX2 (F18–11) – Body ground

G–B – 

Body ground

MPX line

Always

10 k

Ω

 or higher

CPUB (F18–12) – Body ground

W–R – 

Body ground

+B (BATT) power supply

Always

10 to 14 V

GND (F18–8) – 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.

I18632

S19

DI–1898

–

DIAGNOSTICS

MULTIPLEX COMMUNICATION SYSTEM

2092

4.

CHECK SLIDING ROOF ECU

(a)

Disconnect the S19 ECU connector.

(b)

Measure the resistance or voltage of each terminal of the wire harness side connector.
Standard:

Symbols (Terminals No.)

Wiring Color

Terminal Description

Condition

Specified Condition

IG (S19–8) – Body ground

B–R – 

Body ground

Ignition power supply

Ignition switch ON

10 to 14 V

B (S19–5) – Body ground

L–W – 

Body ground

+B (BATT) power supply

Always

10 to 14 V

MPX1 (S19–2) – Body ground

G–O – 

Body ground

MPX line

Always

10 k

Ω

 or higher

E (S19–7) – 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.