| Last Modified: 11-27-2007 | 1.6 U | |
| Service Category: Vehicle Exterior | Section: Lighting (ext) | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000002R69005X |
| Title: LIGHTING (EXT): LIGHTING SYSTEM: TERMINALS OF ECU (2008 LX570) | ||
TERMINALS OF ECU
1. CHECK AFS ECU
(a) Disconnect the E91 ECU connector.
(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 |
|---|---|---|---|---|
|
E91-14 (IGS) - E91-22 (E1) |
R - W-B |
Ignition power supply |
Engine switch on (IG) |
11 to 14 V |
|
E91-15 (IG) - E91-22 (E1) |
L - W-B |
Ignition power supply |
Engine switch on (IG) |
11 to 14 V |
|
E91-22 (E1) - 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 E91 ECU connector.
(d) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
E91-1 (SMBL) - E91-22 (E1) |
R - W-B |
Swivel motor LH power output |
Engine switch on (IG) |
11 to 14 V |
|
E91-2 (SMBR) - E91-22 (E1) |
R - W-B |
Swivel motor RH power output |
Engine switch on (IG) |
11 to 14 V |
|
E91-3 (LHT) - E91-22 (E1) |
G - W-B |
Headlight leveling motor LH power output |
Engine switch on (IG) |
11 to 14 V |
|
E91-4 (RHT) - E91-22 (E1) |
P - W-B |
Headlight leveling motor RH power output |
Engine switch on (IG) |
11 to 14 V |
|
E91-10 (SMR) - E91-22 (E1) |
L - W-B |
Swivel motor RH |
Engine switch on (IG) |
Pulse generation |
|
E91-11 (RH+) - E91-22 (E1) |
G - W-B |
Headlight leveling motor RH |
Engine switch on (IG) |
Pulse generation |
|
E91-12 (MPX1) - E91-22 (E1) |
LG - W-B |
CAN communication |
Engine switch on (IG) |
Pulse generation |
|
E91-13 (MPX2) - E91-22 (E1) |
B - W-B |
CAN communication |
Engine switch on (IG) |
Pulse generation |
|
E91-17 (SHFL) - E91-22 (E1) |
GR - W-B |
Vehicle height signal |
Engine switch on (IG) (no passengers, no luggage, vehicle not moving) |
2.20 to 2.80 V |
|
E91-18 (SBR) - E91-22 (E1) |
L - W-B |
Vehicle height signal |
Engine switch on (IG) |
4.5 to 5.5 V |
|
E91-19 (SHRL) - E91-22 (E1) |
Y - W-B |
Vehicle height signal |
Engine switch on (IG) (no passengers, no luggage, vehicle not moving) |
2.21 to 2.80 V |
|
E91-21 (SGR) - E91-22 (E1) |
P - W-B |
Vehicle height signal |
Always |
Below 1 Ω |
|
E91-23 (SMGL) - E91-22 (E1) |
B - W-B |
Swivel motor LH |
Always |
Below 1 Ω |
|
E91-24 (SMGR) - E91-22 (E1) |
B - W-B |
Swivel motor RH |
Always |
Below 1 Ω |
|
E91-27 (LH-) - E91-22 (E1) |
V - W-B |
Headlight leveling motor LH |
Always |
Below 1 Ω |
|
E91-28 (RH-) - E91-22 (E1) |
BR - W-B |
Headlight leveling motor RH |
Always |
Below 1 Ω |
|
E91-29 (SML) - E91-22 (E1) |
V - W-B |
Swivel motor LH |
Engine switch on (IG) |
Pulse generation |
|
E91-30 (LH+) - E91-22 (E1) |
R - W-B |
Headlight leveling motor LH |
Engine switch on (IG) |
Pulse generation |
2. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)
(a) Disconnect the 2A, 2B, 2C, 2D, E1, E2 and E3 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 |
|---|---|---|---|---|
|
2A-1 (ACC) - Body ground |
B - Body ground |
ACC power supply |
Always |
11 to 14 V |
|
2A-1 (IG) - Body ground |
B - Body ground |
IG power supply |
Always |
11 to 14 V |
|
2A-1 (TRLY) - Body ground |
B - Body ground |
Taillight power supply |
Always |
11 to 14 V |
|
2D-62 (GND2) - Body ground |
W-B - Body ground |
Body ground |
Always |
Below 1 Ω |
|
E3-1 (GND3) - Body ground |
BR - Body ground |
Body ground |
Always |
Below 1 Ω |
|
E1-24 (DCTY) - Body ground |
L - Body ground |
Front door courtesy light switch LH signal |
Front door LH open |
Below 1 Ω |
|
Engine switch off, and front door LH closed |
10 kΩ or higher |
|||
|
E2-21 (PCTY) - Body ground |
Y - Body ground |
Front door courtesy light switch RH signal |
Front door RH open |
Below 1 Ω |
|
Engine switch off, and front door RH closed |
10 kΩ or higher |
|||
|
2C-2 (LCTY) - Body ground |
W - Body ground |
Rear door courtesy light switch LH signal |
Rear door LH open |
Below 1 Ω |
|
Engine switch off, and rear door LH closed |
10 kΩ or higher |
|||
|
E2-7 (RCTY) - Body ground |
G - Body ground |
Rear door courtesy light switch RH signal |
Rear door RH open |
Below 1 Ω |
|
Engine switch off, and rear door RH closed |
10 kΩ or higher |
|||
|
E2-25 (BCTY) - Body ground |
W - Body ground |
Back door courtesy light switch signal |
Back door open |
Below 1 Ω |
|
Engine switch off, and back door closed |
10 kΩ or higher |
|||
|
E1-23 (TAIL) - Body ground |
V - Body ground |
Light control switch TAIL signal |
Light control switch tail |
Below 1 Ω |
|
Light control switch except tail |
10 kΩ or higher |
|||
|
E2-17 (HEAD) - Body ground |
R - Body ground |
Light control switch HEAD signal |
Light control switch head |
Below 1 Ω |
|
Light control switch OFF |
10 kΩ or higher |
|||
|
E1-21 (A) - Body ground |
G - Body ground |
Light control switch AUTO signal |
Light control switch AUTO |
Below 1 Ω |
|
Light control switch OFF |
10 kΩ or higher |
|||
|
2D-13 (HU) - Body ground |
R - Body ground |
Dimmer switch high signal |
Dimmer switch high |
Below 1 Ω |
|
Dimmer switch OFF |
10 kΩ or higher |
|||
|
E1-13 (HF) - Body ground |
GR - Body ground |
Dimmer switch flash signal |
Dimmer switch flash |
Below 1 Ω |
|
Dimmer switch OFF |
10 kΩ or higher |
|||
|
E2-28 (FFOG) - Body ground |
R - Body ground |
Front fog light switch signal |
Front fog light switch on |
Below 1 Ω |
|
Front fog light switch OFF |
10 kΩ or higher |
|||
|
2B-22 (STP) - Body ground |
R - Body ground |
Stop light switch signal |
Brake pedal depressed |
Below 1 Ω |
|
Brake pedal released |
10 kΩ or higher |
|||
|
E3-11 (FSPT) - Body ground |
L - Body ground |
Interior foot light signal |
Engine switch on (IG), and door open |
Below 1 Ω |
|
Engine switch on (IG), and door closed |
10 kΩ or higher |
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the E1 and 2B 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 |
|---|---|---|---|---|
|
2B-16 (DRL) - Body ground*1 |
R-G - Body ground |
Hi-beam circuit |
Light control switch head, dimmer switch high |
Below 1 V |
|
Light control switch head, dimmer switch except high |
11 to 14 V |
|||
|
2B-16 (DIM) - Body ground*2 |
H-G - Body ground |
Hi-beam circuit |
Light control switch head, dimmer switch high |
Below 1 V |
|
Light control switch head, dimmer switch except high |
11 to 14 V |
|||
|
2B-18 (HRLY) - Body ground |
L - Body ground |
Lo-beam circuit |
Light control switch head, dimmer switch low |
Below 1 V |
|
Light control switch head, dimmer switch except low |
11 to 14 V |
|||
|
E1-4 (FFGO) - Body ground |
R - Body ground |
Fog light circuit |
Light control switch tail, front fog light switch on |
Below 1 V |
|
Light control switch tail, front fog light switch off |
11 to 14 V |
*1: for U.S.A.
*2: except U.S.A.
If the result is not as specified, the ECU may have a malfunction.
3. CHECK NO. 2 MAIN BODY ECU
(a) Disconnect the L33 ECU connector.
(b) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
L33-14 (BECU) - Body ground |
R - Body ground |
B power supply |
Always |
11 to 14 V |
|
L33-13 (SIG) - Body ground |
G - Body ground |
SIG power supply |
Engine switch on (IG) |
11 to 14 V |
|
Engine switch off |
Below 1 V |
|||
|
L33-6 (LSPT) - Body ground |
L - Body ground |
Inside handle illumination light signal |
Engine switch on (IG), and door opened |
11 to 14 V |
|
Engine switch on (IG), and door closed |
Below 1 V |
|||
|
L33-9 (RBD1) - Body ground |
L - Body ground |
Side step light LH signal |
Front door LH open |
11 to 14 V |
|
Front door LH closed |
Below 1 V |
|||
|
L33-21 (RBD2) - Body ground |
L - Body ground |
Side step light RH signal |
Front door RH open |
11 to 14 V |
|
Front door RH closed |
Below 1 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
4. CHECK OUTER MIRROR CONTROL ECU
(a) Disconnect the I17 ECU connector.
(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 |
|---|---|---|---|---|
|
I17-9 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
I17-3 (B) - I17-9 (GND) |
R - W-B |
Battery (ECU power source) |
Always |
11 to 14 V |
|
I17-4 (ACC) - I17-9 (GND) |
GR - W-B |
ACC power supply |
Engine switch off |
Below 2 V |
|
Engine switch on (ACC) |
6 V or higher |
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the I17 ECU connector.
(d) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
I18-17 (LP) - I17-9 (GND) |
P - W-B |
Outer rear view mirror LH signal |
Engine switch on (IG) and front door LH open |
9 to 14 V |
|
Engine switch off and front door LH closed |
Below 1 V |
|||
|
I18-37 (LP) - I17-9 (GND) |
P - W-B |
Outer rear view mirror RH signal |
Engine switch on (IG) and front door RH open |
9 to 14 V |
|
Engine switch off and front door RH closed |
Below 1 V |
If the result is not as specified, the ECU may have a malfunction.
|
|