| Last Modified: 11-27-2007 | 1.6 U | |
| Service Category: Vehicle Interior | Section: Seat | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000003FY9000X |
| Title: SEAT: REAR POWER SEAT CONTROL SYSTEM (for Rear No. 2 Seat with Automatic Folding-up Function): TERMINALS OF ECU (2008 LX570) | ||
TERMINALS OF ECU
1. CHECK FOLD SEAT CONTROL ECU LH
(a) Disconnect the i11 and i12 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 |
|---|---|---|---|---|
|
i11-4 (+B) - i11-8 (GND) |
R - W-B |
Power source |
Always |
11 to 14 V |
|
i11-8 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
i12-1 (ECUB) - i11-8 (GND) |
R - W-B |
Power source |
Always |
11 to 14 V |
|
i12-3 (IG) - i11-8 (GND) |
G - W-B |
Engine switch signal |
Engine switch on (IG) |
6 V or higher |
|
Engine switch off |
Below 2 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the i11 and i12 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 |
|---|---|---|---|---|
|
i11-1 (FLD+) - i11-8 (GND) |
G - W-B |
Folding-up motor LH operation signal |
Rear No. 2 seat LH folding-up operation |
9 to 14 V |
|
i11-2 (ACT+) - i11-8 (GND) |
B - W-B |
Closer motor LH operation signal |
Closer motor LH lock operation |
9 to 14 V |
|
i11-3 (FACT) - i11-8 (GND) |
B - W-B |
Floor release motor LH operation signal |
Floor release motor LH operating |
9 to 14 V |
|
i11-5 (FLD-) - i11-8 (GND) |
R - W-B |
Folding-up motor LH operation signal |
Rear No. 2 seat LH return operation |
9 to 14 V |
|
i11-6 (ACT-) - i11-8 (GND) |
W - W-B |
Closer motor LH operation signal |
Closer motor LH unlock operation |
9 to 14 V |
|
i11-7 (RACT) - i11-8 (GND) |
L - W-B |
No. 1 back release motor LH operation signal |
No. 1 back release motor LH operating |
9 to 14 V |
|
No. 2 back release motor LH operation signal |
No. 2 back release motor LH operating |
|||
|
i12-5 (BDCY) - i11-8 (GND) |
W - W-B |
Back door courtesy switch signal |
Back door open |
Below 1 V |
|
Back door closed |
9 to 14 V |
|||
|
i12-14 (TBL) - i11-8 (GND) |
Y - W-B |
Fold seat switch signal (Table switch LH) |
Back door open Fold seat switch (Table switch LH) off |
9 to 14 V |
|
Back door open Fold seat switch (Table switch LH) on |
Below 1 V |
|||
|
i12-15 (RTRN) - i11-8 (GND) |
GR - W-B |
Fold seat switch signal (Seat switch LH) |
Back door open Fold seat switch (Seat switch LH) off |
9 to 14 V |
|
Back door open Fold seat switch (Seat switch LH) on |
Below 1 V |
|||
|
i12-16 (FOLD) - i11-8 (GND) |
G - W-B |
Fold seat switch signal (Fold switch LH) |
Back door open Fold seat switch (Fold switch LH) off |
9 to 14 V |
|
Back door open Fold seat switch (Fold switch LH) on |
Below 1 V |
|||
|
i12-17 (LOPN) - i11-8 (GND) |
V - W-B |
No. 1 closer motor position slide switch LH signal |
No. 1 closer motor position slide switch LH off |
9 to 14 V |
|
No. 1 closer motor position slide switch LH on |
Below 1 V |
|||
|
i12-19 (LCTY) - i11-8 (GND) |
L - W-B |
Seat fixing lock switch LH signal |
Seat fixing lock switch LH off |
9 to 14 V |
|
Seat fixing lock switch LH on |
Below 1 V |
|||
|
i12-20 (LCLS) - i11-8 (GND) |
P - W-B |
No. 2 closer motor position slide switch LH signal |
No. 2 closer motor position slide switch LH off |
9 to 14 V |
|
No. 2 closer motor position slide switch LH on |
Below 1 V |
|||
|
i12-23 (SFLD) - i12-30 (SG1) |
W - B |
Seat cushion position sensor LH signal |
Folding-up motor LH operating |
Pulse generation |
|
i12-24 (SV1) - i11-8 (GND) |
G - W-B |
Power supply for seat cushion position sensor LH |
Back door open |
4.8 V or higher |
|
Back door closed |
Below 1 V |
|||
|
i12-30 (SG1) - Body ground |
B - Body ground |
Ground for seat cushion position sensor LH |
Always |
Below 1 Ω |
|
i12-32 (P) - i11-8 (GND) |
G - W-B |
Park/neutral position switch signal |
Engine switch on (IG) Park/neutral position switch in P position |
6 V or higher |
|
Engine switch on (IG) Park/neutral position switch not in P position |
Below 2 V |
|||
|
i12-34 (IND2) - i11-8 (GND) |
B - W-B |
3rd seat indicator signal |
Engine switch on (IG) 3rd Seat indicator off |
9 to 14 V |
|
Engine switch on (IG) 3rd Seat indicator on |
Below 1 V |
|||
|
i12-35 (IND1) - i11-8 (GND) |
W - W-B |
Fold seat switch indicator LH signal |
Back door open Fold seat switch indicator LH off |
Below 1 V |
|
Back door open Fold seat switch indicator LH on |
8.6 to 14 V |
|||
|
i12-37 (LCKF) - i11-8 (GND) |
SB - W-B |
No. 1 floor striker limit switch LH signal |
No. 1 floor striker limit switch LH off |
9 to 14 V |
|
No. 1 floor striker limit switch LH on |
Below 1 V |
|||
|
i12-38 (LCKB) - i11-8 (GND) |
L - W-B |
No. 1 seatback lock switch LH signal |
No. 1 seatback lock switch LH off |
9 to 14 V |
|
No. 1 seatback lock switch LH on |
Below 1 V |
|||
|
No. 2 seatback lock switch LH signal |
No. 2 seatback lock switch LH off |
9 to 14 V |
||
|
No. 2 seatback lock switch LH on |
Below 1 V |
|||
|
i12-39 (ERAB) - i11-8 (GND) |
BR - W-B |
Seatback area switch LH signal |
Seatback area switch LH off |
9 to 14 V |
|
Seatback area switch LH on |
Below 1 V |
|||
|
i12-40 (LCK2) - i11-8 (GND) |
R - W-B |
No. 2 floor striker limit switch LH signal |
No. 2 floor striker limit switch LH off |
9 to 14 V |
|
No. 2 floor striker limit switch LH on |
Below 1 V |
If the result is not as specified, the fold seat control ECU may have a malfunction.
2. CHECK FOLD SEAT CONTROL ECU RH
(a) Disconnect the i3 and i4 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 |
|---|---|---|---|---|
|
i3-4 (+B) - i3-8 (GND) |
L - W-B |
Power source |
Always |
11 to 14 V |
|
i3-8 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
i4-1 (ECUB) - i3-8 (GND) |
R - W-B |
Power source |
Always |
11 to 14 V |
|
i4-3 (IG) - i3-8 (GND) |
G - W-B |
Engine switch signal |
Engine switch on (IG) |
6 V or higher |
|
Engine switch off |
Below 2 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the i3 and i4 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 |
|---|---|---|---|---|
|
i3-1 (FLD+) - i3-8 (GND) |
L - W-B |
Folding-up motor RH operation signal |
Rear No. 2 seat RH folding-up operation |
9 to 14 V |
|
i3-2 (ACT+) - i3-8 (GND) |
B - W-B |
Closer motor RH operation signal |
Closer motor RH lock operation |
9 to 14 V |
|
i3-3 (FACT) - i3-8 (GND) |
B - W-B |
Floor release motor RH operation signal |
Floor release motor RH operating |
9 to 14 V |
|
i3-5 (FLD-) - i3-8 (GND) |
GR - W-B |
Folding-up motor RH operation signal |
Rear No. 2 seat RH return operation |
9 to 14 V |
|
i3-6 (ACT-) - i3-8 (GND) |
W - W-B |
Closer motor RH operation signal |
Closer motor RH unlock operation |
9 to 14 V |
|
i3-7 (RACT) - i3-8 (GND) |
L - W-B |
No. 1 back release motor RH operation signal |
No. 1 back release motor RH operating |
9 to 14 V |
|
No. 2 back release motor RH operation signal |
No. 2 back release motor RH operating |
|||
|
i4-5 (BDCY) - i3-8 (GND) |
W - W-B |
Back door courtesy switch signal |
Back door open |
Below 1 V |
|
Back door closed |
9 to 14 V |
|||
|
i4-14 (TBL) - i3-8 (GND) |
Y - W-B |
Fold seat switch signal (Table switch RH) |
Back door open Fold seat switch (Table switch RH) off |
9 to 14 V |
|
Back door open Fold seat switch (Table switch RH) on |
Below 1 V |
|||
|
i4-15 (RTRN) - i3-8 (GND) |
GR - W-B |
Fold seat switch signal (Seat switch RH) |
Back door open Fold seat switch (Seat switch RH) off |
9 to 14 V |
|
Back door open Fold seat switch (Seat switch RH) on |
Below 1 V |
|||
|
i4-16 (FOLD) - i3-8 (GND) |
G - W-B |
Fold seat switch signal (Fold switch RH) |
Back door open Fold seat switch (Fold switch RH) off |
9 to 14 V |
|
Back door open Fold seat switch (Fold switch RH) on |
Below 1 V |
|||
|
i4-17 (LOPN) - i3-8 (GND) |
V - W-B |
No. 1 closer motor position slide switch RH signal |
No. 1 closer motor position slide switch RH off |
9 to 14 V |
|
No. 1 closer motor position slide switch RH on |
Below 1 V |
|||
|
i4-19 (LCTY) - i3-8 (GND) |
L - W-B |
Seat fixing lock switch RH signal |
Seat fixing lock switch RH off |
9 to 14 V |
|
Seat fixing lock switch RH on |
Below 1 V |
|||
|
i4-20 (LCLS) - i3-8 (GND) |
P - W-B |
No. 2 closer motor position slide switch RH signal |
No. 2 closer motor position slide switch RH off |
9 to 14 V |
|
No. 2 closer motor position slide switch RH on |
Below 1 V |
|||
|
i4-23 (SFLD) - i4-30 (SG1) |
W - B |
Seat cushion position sensor RH signal |
Folding-up motor RH operating |
Pulse generation |
|
i4-24 (SV1) - i3-8 (GND) |
G - W-B |
Power supply for seat cushion position sensor RH |
Back door open |
4.8 V or higher |
|
Back door closed |
Below 1 V |
|||
|
i4-30 (SG1) - Body ground |
B - Body ground |
Ground for seat cushion position sensor RH |
Always |
Below 1 Ω |
|
i4-32 (P) - i3-8 (GND) |
G - W-B |
Park/neutral position switch signal |
Engine switch on (IG) Park/neutral position switch in P position |
6 V or higher |
|
Engine switch on (IG) Park/neutral position switch not in P position |
Below 2 V |
|||
|
i4-34 (IND2) - i3-8 (GND) |
B - W-B |
3rd seat indicator signal |
Engine switch on (IG) 3rd Seat indicator off |
9 to 14 V |
|
Engine switch on (IG) 3rd Seat indicator on |
Below 1 V |
|||
|
i4-35 (IND1) - i3-8 (GND) |
W - W-B |
Fold seat switch indicator RH signal |
Back door open Fold seat switch indicator RH off |
Below 1 V |
|
Back door open Fold seat switch indicator RH on |
9 to 14 V |
|||
|
i4-37 (LCKF) - i3-8 (GND) |
SB - W-B |
No. 1 floor striker limit switch RH signal |
No. 1 floor striker limit switch RH off |
8.6 to 14 V |
|
No. 1 floor striker limit switch RH on |
Below 1 V |
|||
|
i4-38 (LCKB) - i3-8 (GND) |
L - W-B |
No. 1 seatback lock switch RH signal |
No. 1 seatback lock switch RH off |
9 to 14 V |
|
No. 1 seatback lock switch RH on |
Below 1 V |
|||
|
No. 2 seatback lock switch RH signal |
No. 2 seatback lock switch RH off |
9 to 14 V |
||
|
No. 2 seatback lock switch RH on |
Below 1 V |
|||
|
i4-39 (ERAB) - i3-8 (GND) |
BR - W-B |
Seatback area switch RH signal |
Seatback area switch RH off |
9 to 14 V |
|
Seatback area switch RH on |
Below 1 V |
|||
|
i4-40 (LCK2) - i3-8 (GND) |
R - W-B |
No. 2 floor striker limit switch RH signal |
No. 2 floor striker limit switch RH off |
9 to 14 V |
|
No. 2 floor striker limit switch RH on |
Below 1 V |
If the result is not as specified, the fold seat control ECU may have a malfunction.
|
|