- L34-9 (HAF) - L34-7 (GND)
- L33-8 (HAF) - L34-7 (GND)
- L34-4 (FUL) - L34-7 (GND)
- L33-22 (FUL) - L34-7 (GND)
| Last Modified: 11-27-2007 | 1.6 U | |
| Service Category: Vehicle Exterior | Section: Door/Hatch | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000003EUD000X |
| Title: DOOR / HATCH: TAIL GATE CLOSER SYSTEM: TERMINALS OF ECU (2008 LX570) | ||
TERMINALS OF ECU
1. CHECK NO. 2 MAIN BODY ECU
(a) Disconnect the L33 and L34 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 |
|---|---|---|---|---|
|
L33-14 (BECU) - Body ground |
R - Body ground |
BECU 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 |
|
L33-13 (SIG) - Body ground |
G - Body ground |
SIG power supply |
Engine switch off |
Below 1 V |
|
L34-5 (B) - Body ground |
B - Body ground |
Lower tail gate lock motor RH power supply |
Always |
11 to 14 V |
|
L34-6 (B) - Body ground |
W - Body ground |
Lower tail gate lock motor LH power supply |
Always |
11 to 14 V |
|
L33-7 (GND) - Body ground |
W-B - Body ground |
Body ground |
Always |
Below 1 Ω |
|
L34-7 (GND) - Body ground |
W-B - Body ground |
Body ground |
Always |
Below 1 Ω |
|
L33-19 (BDSU) - Body ground |
V - Body ground |
Back door remote control signal circuit |
Back door remote control pulled (on) |
Below 1 Ω |
|
L33-19 (BDSU) - Body ground |
V - Body ground |
Back door remote control signal circuit |
Back door remote control free (off) |
10 kΩ or higher |
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the L33 and L34 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 |
|---|---|---|---|---|
|
L34-3 (DC+) - L34-7 (GND) |
R - W-B |
Lower tail gate lock motor LH circuit |
Lower tail gate lock motor LH operating (close) |
11 to 14 V |
|
L34-3 (DC+) - L34-7 (GND) |
R - W-B |
Lower tail gate lock motor LH circuit |
Lower tail gate lock motor LH stopped |
Below 1 V |
|
L34-8 (DC-) - L34-7 (GND) |
B - W-B |
Lower tail gate lock motor LH circuit |
Lower tail gate lock motor LH operating (open) |
11 to 14 V |
|
L34-8 (DC-) - L34-7 (GND) |
B - W-B |
Lower tail gate lock motor LH circuit |
Lower tail gate lock motor LH stopped |
Below 1 V |
|
L34-2 (DC+) - L34-7 (GND) |
G - W-B |
Lower tail gate lock motor RH circuit |
Lower tail gate lock motor RH operating (close) |
11 to 14 V |
|
L34-2 (DC+) - L34-7 (GND) |
G - W-B |
Lower tail gate lock motor RH circuit |
Lower tail gate lock motor RH stopped |
Below 1 V |
|
L34-1 (DC-) - L34-7 (GND) |
W - W-B |
Lower tail gate lock motor RH circuit |
Lower tail gate lock motor RH operating (open) |
11 to 14 V |
|
L34-1 (DC-) - L34-7 (GND) |
W - W-B |
Lower tail gate lock motor RH circuit |
Lower tail gate lock motor RH stopped |
Below 1 V |
|
L34-9 (HAF) - L34-7 (GND) |
GR - W-B |
Half-latch switch LH signal circuit |
Lower tail gate open |
Below 1 V |
|
L34-9 (HAF) - L34-7 (GND) |
GR - W-B |
Half-latch switch LH signal circuit |
Lower tail gate closed |
Pulse generation (see waveform 1) |
|
L33-8 (HAF) - L34-7 (GND) |
B - W-B |
Half-latch switch RH signal circuit |
Lower tail gate open |
Below 1 V |
|
L33-8 (HAF) - L34-7 (GND) |
B - W-B |
Half-latch switch RH signal circuit |
Lower tail gate closed |
Pulse generation (see waveform 1) |
|
L34-4 (FUL) - L34-7 (GND) |
G - W-B |
Lower tail gate courtesy switch LH signal circuit |
Lower tail gate open |
Below 1 V |
|
L34-4 (FUL) - L34-7 (GND) |
G - W-B |
Lower tail gate courtesy switch LH signal circuit |
Lower tail gate closed |
Pulse generation (see waveform 1) |
|
L33-22 (FUL) - L34-7 (GND) |
Y - W-B |
Lower tail gate courtesy switch RH signal circuit |
Lower tail gate open |
Below 1 V |
|
L33-22 (FUL) - L34-7 (GND) |
Y - W-B |
Lower tail gate courtesy switch RH signal circuit |
Lower tail gate closed |
Pulse generation (see waveform 1) |
|
L34-10 (LMT) - L34-7 (GND) |
Y - W-B |
Close position switch LH signal circuit |
Lower tail gate closed |
Below 1 V |
|
L33-10 (LMT) - L34-7 (GND) |
Y - W-B |
Close position switch LH signal circuit |
Lower tail gate open |
Pulse generation (see waveform 2) |
|
L33-17 (LMT) - L34-7 (GND) |
L - W-B |
Close position switch RH signal circuit |
Lower tail gate closed |
Below 1 V |
|
L33-17 (LMT) - L34-7 (GND) |
L - W-B |
Close position switch RH signal circuit |
Lower tail gate open |
Pulse generation (see waveform 2) |
|
L33-15 (POL) - L34-7 (GND) |
L - W-B |
Pawl switch LH signal circuit |
Lower tail gate lock motor LH is operating |
Below 1 V |
|
L33-15 (POL) - L34-7 (GND) |
L - W-B |
Pawl switch LH signal circuit |
Lower tail gate open |
Pulse generation (see waveform 2) |
|
L33-16 (POL) - L34-7 (GND) |
R - W-B |
Pawl switch RH signal circuit |
Lower tail gate lock motor LH is operating |
Below 1 V |
|
L33-16 (POL) - L34-7 (GND) |
R - W-B |
Pawl switch RH signal circuit |
Lower tail gate open |
Pulse generation (see waveform 2) |
|
L33-19 (BDSU) - L34-7 (GND) |
V - W-B |
Back door remote control signal circuit |
Back door remote control pulled (on) |
Below 1 V |
|
L33-19 (BDSU) - L34-7 (GND) |
V - W-B |
Back door remote control signal circuit |
Back door remote control free (off) |
Pulse generation (see waveform 3) |
If the result is not as specified, the ECU may have a malfunction.
|
(e) Using an oscilloscope, check waveform 1.
|
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(f) Using an oscilloscope, check waveform 2.
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(g) Using an oscilloscope, check waveform 3.
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