| Last Modified: 11-29-2007 | 1.6 U | |
| Service Category: Power Source/Network | Section: Networking | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000002VT3002X |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM: TERMINALS OF ECU (2008 Sequoia) | ||
TERMINALS OF ECU
HINT:
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
1. JUNCTION CONNECTOR
(a) NO. 1 JUNCTION CONNECTOR
Wiring Color
|
Junction Connector A Side |
Color (CANH Side) |
Color (CANL Side) |
|---|---|---|
|
Combination meter ECU (H91)*1*2 |
SB |
W |
|
No. 4 junction connector (H91)*1*3 |
SB |
W |
|
Center airbag sensor (H90) |
BR |
W |
|
Skid control ECU (A59) |
B |
W |
|
Distance control ECU (A60)*4 |
O |
W |
Wiring Color
|
Junction Connector B Side |
Color (CANH Side) |
Color (CANL Side) |
|---|---|---|
|
DLC3 (H93) |
V |
W |
|
Main body ECU (H103)*1 |
L |
W |
|
No. 2 junction connector (H101) |
R |
W |
|
Steering angle sensor (H94) |
G |
W |
|
Power steering ECU (H106) |
GR |
W |
HINT:
- *1: for V bus
- *2: w/o air suspension system
- *3: w/ air suspension system
- *4: w/ Dynamic laser cruise control
- The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
- The connectors can be connected to any terminals on the same side.
(b) NO. 2 JUNCTION CONNECTOR
Wiring Color
|
Junction Connector A Side |
Color (CANH Side) |
Color (CANL Side) |
|---|---|---|
|
Bus buffer ECU (H105) |
P |
W |
|
No. 1 junction connector (H100) |
R |
W |
|
ECM (H99) |
GR |
W |
|
4WD control ECU (H95) |
O |
W |
|
Air conditioning amplifier (H92) |
B |
W |
HINT:
- The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
- The connectors can be connected to any terminals on the same side.
(c) NO. 3 JUNCTION CONNECTOR
Wiring Color
|
Junction Connector A Side |
Color (CANH Side) |
Color (CANL Side) |
|---|---|---|
|
Power seat control ECU (H97)*1 |
GR |
W |
|
Multiplex tilt and telescopic ECU (H96)*1 |
O |
W |
|
Main body ECU (H104)*2*3 |
B |
W |
|
No. 4 junction connector (H104)*2*4 |
B |
W |
|
Combination meter ECU (H102)*2 |
Y |
W |
Wiring Color
|
Junction Connector B Side |
Color (CANH Side) |
Color (CANL Side) |
|---|---|---|
|
Outer mirror control ECU (H98)*1 |
LG |
W |
HINT:
- *1: w/ Seat Memory
- *2: for MS bus
- *3: w/o power back door system
- *4: w/ power back door system
- The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
- The connectors can be connected to any terminals on the same side.
|
(d) TERMINALS OF CONNECTORS FOR JUNCTION CONNECTOR (No. 1, No. 2 and No. 3)
|
(e) NO. 4 JUNCTION CONNECTOR (FRONT OF THE VEHICLE)
|
Terminal No. (Symbol) |
Wiring Color |
Destination |
|---|---|---|
|
O41-1 (CANH) |
SB |
Combination meter ECU (CANH)*1 |
|
O41-7 (CANL) |
W |
Combination meter ECU (CANL)*1 |
|
O41-2 (CANH) |
L |
No. 1 junction connector*1 |
|
O41-8 (CANL) |
W |
No. 1 junction connector*1 |
|
O41-5 (CANH) |
B |
Main body ECU (CANH)*2 |
|
O41-11 (CANL) |
W |
Main body ECU (CANL)*2 |
|
O41-6 (CANH) |
P |
No. 3 junction connector*2 |
|
O41-12 (CANL) |
W |
No. 3 junction connector*2 |
HINT:
- *1: for V bus
- *2: for MS bus
- The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
- The connectors can be connected to any terminals on the same side.
(f) NO. 4 JUNCTION CONNECTOR (REAR OF THE VEHICLE)
|
Terminal No. (Symbol) |
Wiring Color |
Destination |
|---|---|---|
|
O42-1 (CANH) |
B |
Power back door ECU (CANH)*2 |
|
O42-7 (CANL) |
W |
Power back door ECU (CANL)*2 |
|
O42-6 (CANH) |
B |
Suspension control ECU (CANH)*1 |
|
O42-12 (CANL) |
W |
Suspension control ECU (CANL)*1 |
HINT:
- *1: for V bus
- *2: for MS bus
- The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
- The connectors can be connected to any terminals on the same side.
|
2. CHECK DLC3 (a) Measure the resistance according to the value(s) in the table below.
|
3. CHECK SKID CONTROL ECU
(a) Disconnect the A19 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
A19-5 (CANH) - A19-4 (CANL) |
B - W |
Ignition switch off |
54 to 69 Ω |
|
A19-5 (CANH) - A19-1 (GND1) |
B - W-B |
Ignition switch off |
200 Ω or higher |
|
A19-4 (CANL) - A19-1 (GND1) |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
A19-5 (CANH) - A19-16 (+BM) |
B - L |
Ignition switch off |
6 kΩ or higher |
|
A19-4 (CANL) - A19-16 (+BM) |
W - L |
Ignition switch off |
6 kΩ or higher |
4. CHECK MAIN BODY ECU
(a) Disconnect the H2, DB and DD ECU connectors.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
H2-5 (CANH) - H2-6 (CANL)*1 |
L - W |
Ignition switch off |
54 to 69 Ω |
|
H2-5 (CANH) - DD-62 (GND1)*1 |
L - W-B |
Ignition switch off |
200 Ω or higher |
|
H2-6 (CANL) - DD-62 (GND1)*1 |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
H2-5 (CANH) - DB-13 (BECU)*1 |
L - GR |
Ignition switch off |
6 kΩ or higher |
|
H2-6 (CANL) - DB-13 (BECU)*1 |
W - GR |
Ignition switch off |
6 kΩ or higher |
|
H2-16 (CANP) - H2-15 (CANN)*2 |
B - W |
Ignition switch off |
108 to 132 Ω |
|
H2-16 (CANP) - DD-62 (GND1)*2 |
B - W-B |
Ignition switch off |
200 Ω or higher |
|
H2-15 (CANN) - DD-62 (GND1)*2 |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
H2-16 (CANP) - DB-13 (BECU)*2 |
B - GR |
Ignition switch off |
6 kΩ or higher |
|
H2-15 (CANN) - DB-13 (BECU)*2 |
W - GR |
Ignition switch off |
6 kΩ or higher |
HINT:
- *1: for V bus
- *2: for MS bus
5. CHECK ECM
(a) Disconnect the A27 and D56 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
A27-10 (CANH) - A27-11 (CANL) |
GR - W |
Ignition switch off |
108 to 132 Ω |
|
A27-10 (CANH) - D56-81 (E1) |
GR - BR |
Ignition switch off |
200 Ω or higher |
|
A27-11 (CANL) - D56-81 (E1) |
W - BR |
Ignition switch off |
200 Ω or higher |
|
A27-10 (CANH) - A27-3 (+B) |
GR - GR |
Ignition switch off |
6 kΩ or higher |
|
A27-11 (CANL) - A27-3 (+B) |
W - GR |
Ignition switch off |
6 kΩ or higher |
6. CHECK AIR CONDITIONING AMPLIFIER
(a) Disconnect the H24 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
H24-11 (CANH) - H24-12 (CANL) |
B - W |
Ignition switch off |
54 to 69 Ω |
|
H24-11 (CANH) - H24-14 (GND) |
B - W-B |
Ignition switch off |
200 Ω or higher |
|
H24-12 (CANL) - H24-14 (GND) |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
H24-11 (CANH) - H24-21 (B) |
B - R |
Ignition switch off |
6 kΩ or higher |
|
H24-12 (CANL) - H24-21 (B) |
W - R |
Ignition switch off |
6 kΩ or higher |
7. CHECK CENTER AIRBAG SENSOR
(a) Disconnect the H56 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
H56-13 (CANH) - H56-22 (CANL) |
BR - W |
Ignition switch off |
54 to 69 Ω |
|
H56-13 (CANH) - H56-25 (E1) |
BR - W-B |
Ignition switch off |
200 Ω or higher |
|
H56-22 (CANL) - H56-25 (E1) |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
H56-13 (CANH) - H19-16 (BAT) |
BR - P |
Ignition switch off |
6 kΩ or higher |
|
H56-22 (CANL) - H19-16 (BAT) |
W - P |
Ignition switch off |
6 kΩ or higher |
8. CHECK COMBINATION METER ECU
(a) Disconnect the H37 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
H37-33 (CANH) - H37-34 (CANL)*1 |
SB - W |
Ignition switch off |
108 to 132 Ω |
|
H37-33 (CANH) - H37-40 (E1)*1 |
SB - W-B |
Ignition switch off |
200 Ω or higher |
|
H37-34 (CANL) - H37-40 (E1)*1 |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
H37-33 (CANH) - H37-18 (B)*1 |
SB - LG |
Ignition switch off |
6 kΩ or higher |
|
H37-34 (CANL) - H37-18 (B)*1 |
W - LG |
Ignition switch off |
6 kΩ or higher |
|
H37-22 (CANH) - H37-21 (CANL)*2 |
Y - W |
Ignition switch off |
108 to 132 Ω |
|
H37-22 (CANH) - H37-40 (E1)*2 |
Y - W-B |
Ignition switch off |
200 Ω or higher |
|
H37-21 (CANL) - H37-40 (E1)*2 |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
H37-22 (CANH) - H37-18 (B)*2 |
Y - LG |
Ignition switch off |
6 kΩ or higher |
|
H37-21 (CANL) - H37-18 (B)*2 |
W - LG |
Ignition switch off |
6 kΩ or higher |
HINT:
- *1: for V bus
- *2: for MS bus
9. CHECK STEERING ANGLE SENSOR
(a) Disconnect the H6 sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
H6-10 (CANH) - H6-9 (CANL) |
G - W |
Ignition switch off |
54 to 69 Ω |
|
H6-10 (CANH) - H6-2 (ESS) |
G - W-B |
Ignition switch off |
200 Ω or higher |
|
H6-9 (CANL) - H6-2 (ESS) |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
H6-10 (CANH) - H6-3 (BAT) |
G - R |
Ignition switch off |
6 kΩ or higher |
|
H6-9 (CANL) - H6-3 (BAT) |
W - R |
Ignition switch off |
6 kΩ or higher |
10. CHECK 4WD CONTROL ECU
HINT:
For vehicle with 4 wheel drive only.
(a) Disconnect the A28 and A29 ECU connectors.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
A28-19 (CANH) - A28-20 (CANL) |
O - W |
Ignition switch off |
54 to 69 Ω |
|
A28-19 (CANH) - A29-4 (GND) |
O - W-B |
Ignition switch off |
200 Ω or higher |
|
A28-20 (CANL) - A29-4 (GND) |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
A28-19 (CANH) - H19-16 (BAT) |
O - P |
Ignition switch off |
6 kΩ or higher |
|
A28-20 (CANL) - H19-16 (BAT) |
W - P |
Ignition switch off |
6 kΩ or higher |
|
11. CHECK BUS BUFFER ECU HINT:
For vehicle with bus buffer ECU only. (a) Disconnect the H66 ECU connector. (b) Measure the resistance according to the value(s) in the table below.
|
12. CHECK POWER SEAT CONTROL ECU
HINT:
For vehicle with front power seat control system (w/ Seat memory) only.
(a) Disconnect the X10 and X11 ECU connectors.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
X11-5 (CANH) - X11-1 (CANL) |
GR - W |
Ignition switch off |
54 to 69 Ω |
|
X11-5 (CANH) - X10-1 (GND) |
GR - W-B |
Ignition switch off |
200 Ω or higher |
|
X11-1 (CANL) - X10-1 (GND) |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
X11-5 (CANH) - X10-5 (+B) |
GR - L |
Ignition switch off |
6 kΩ or higher |
|
X11-1 (CANL) - X10-5 (+B) |
W - L |
Ignition switch off |
6 kΩ or higher |
13. CHECK OUTER MIRROR CONTROL ECU
HINT:
For vehicle with front power seat control system (w/ Seat memory) only.
(a) Disconnect the M7 and M8 ECU connectors.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
M8-1 (CAN) - M8-21 (CGND) |
LG - W |
Ignition switch off |
54 to 69 Ω |
|
M8-1 (CAN) - M7-9 (GND) |
LG - W-B |
Ignition switch off |
200 Ω or higher |
|
M8-21 (CGND) - M7-9 (GND) |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
M8-1 (CAN) - M7-3 (B) |
LG - R |
Ignition switch off |
6 kΩ or higher |
|
M8-21 (CGND) - M7-3 (B) |
W - R |
Ignition switch off |
6 kΩ or higher |
14. CHECK MULTIPLEX TILT AND TELESCOPIC ECU
HINT:
For vehicle with front power seat control system (w/ Seat memory) only.
(a) Disconnect the H57 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
H57-5 (CANH) - H57-14 (CANL) |
O - W |
Ignition switch off |
54 to 69 Ω |
|
H57-5 (CANH) - H57-11 (GND) |
O - W-B |
Ignition switch off |
200 Ω or higher |
|
H57-14 (CANL) - H57-11 (GND) |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
H57-5 (CANH) - H57-2 (+B) |
O - V |
Ignition switch off |
6 kΩ or higher |
|
H57-14 (CANL) - H57-2 (+B) |
W - V |
Ignition switch off |
6 kΩ or higher |
15. CHECK DISTANCE CONTROL ECU
HINT:
For vehicle with dynamic laser cruise control system only.
(a) Disconnect the A43 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
A43-8 (CANH) - A43-9 (CANL) |
O - W |
Ignition switch off |
54 to 69 Ω |
|
A43-8 (CANH) - A43-12 (GND) |
O - BR |
Ignition switch off |
200 Ω or higher |
|
A43-9 (CANL) - A43-12 (GND) |
W - BR |
Ignition switch off |
200 Ω or higher |
|
A43-8 (CANH) - A43-1 (B) |
O - O |
Ignition switch off |
6 kΩ or higher |
|
A43-9 (CANL) - A43-1 (B) |
W - O |
Ignition switch off |
6 kΩ or higher |
16. CHECK POWER STEERING ECU
(a) Disconnect the H38 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
H38-8 (CANH) - H38-3 (CANL) |
GR - W |
Ignition switch off |
54 to 69 Ω |
|
H38-8 (CANH) - H38-2 (GND) |
GR - W-B |
Ignition switch off |
200 Ω or higher |
|
H38-3 (CANL) - H38-2 (GND) |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
H38-8 (CANH) - H19-16 (BAT) |
GR - P |
Ignition switch off |
6 kΩ or higher |
|
H38-3 (CANL) - H19-16 (BAT) |
W - P |
Ignition switch off |
6 kΩ or higher |
17. CHECK SUSPENSION CONTROL ECU
HINT:
For vehicle with air suspension system only.
(a) with AVS
(1) Disconnect the O17 and O18 ECU connector.
(2) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
O18-30 (CANH) - O18-29 (CANL) |
B - W |
Ignition switch off |
54 to 69 Ω |
|
O18-30 (CANH) - O18-1 (GND) |
B - W-B |
Ignition switch off |
200 Ω or higher |
|
O18-29 (CANL) - O18-1 (GND) |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
O18-30 (CANH) - O17-6 (B) |
B - SB |
Ignition switch off |
6 kΩ or higher |
|
O18-29 (CANL) - O17-6 (B) |
W - SB |
Ignition switch off |
6 kΩ or higher |
(b) without AVS
(1) Disconnect the O19 ECU connector.
(2) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
O19-29 (CANH) - O19-28 (CANL) |
B - W |
Ignition switch off |
54 to 69 Ω |
|
O19-29 (CANH) - O19-22 (GND) |
B - W-B |
Ignition switch off |
200 Ω or higher |
|
O19-28 (CANL) - O19-22 (GND) |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
O19-29 (CANH) - O19-24 (B) |
B - SB |
Ignition switch off |
6 kΩ or higher |
|
O19-28 (CANL) - O19-24 (B) |
W - SB |
Ignition switch off |
6 kΩ or higher |
18. CHECK POWER BACK DOOR ECU
HINT:
For vehicle with power back door system only.
(a) Disconnect the O30 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
O30-6 (CANP) - O30-5 (CANN) |
B - W |
Ignition switch off |
54 to 69 Ω |
|
O30-6 (CANP) - O30-11 (GND) |
B - W-B |
Ignition switch off |
200 Ω or higher |
|
O30-5 (CANN) - O30-11 (GND) |
W - W-B |
Ignition switch off |
200 Ω or higher |
|
O30-6 (CANP) - O30-12 (B) |
B - L |
Ignition switch off |
6 kΩ or higher |
|
O30-5 (CANN) - O30-12 (B) |
W - L |
Ignition switch off |
6 kΩ or higher |
|
|