| Last Modified: 11-27-2007 | 1.6 U | |
| Service Category: Power Source/Network | Section: Networking | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000002S8900DX |
| Title: NETWORKING: LIN COMMUNICATION SYSTEM: TERMINALS OF ECU (2008 LX570) | ||
TERMINALS OF ECU
1. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)
(a) Disconnect the 2D, E1, E2 and E3 ECU connectors.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
2D-62 (GND2) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
E3-1 (GND3) - Body ground |
BR - Body ground |
Ground |
Always |
Below 1 Ω |
|
E2-1 (AM2) - 2D-62 (GND2) |
W - W-B |
Battery power supply |
Always |
11 to 14 V |
|
E1-6 (AM1) - 2D-62 (GND2) |
W - W-B |
Battery power supply |
Always |
11 to 14 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
2. CHECK MASTER SWITCH
(a) Disconnect the I11 switch connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
I11-11 (B) - I11-12 (GND) |
L - W-B |
Battery power supply |
Always |
11 to 14 V |
|
I11-12 (GND) - 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.
3. CHECK FRONT POWER WINDOW REGULATOR MOTOR LH
(a) Disconnect the I12 motor connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
I12-2 (B) - I12-1 (GND) |
L - W-B |
Battery power supply |
Always |
11 to 14 V |
|
I12-1 (GND) - 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.
4. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH
(a) Disconnect the I4 motor connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
I4-2 (B) - I4-1 (GND) |
L - W-B |
Battery power supply |
Always |
11 to 14 V |
|
I4-1 (GND) - 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.
5. CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH
(a) Disconnect the J11 motor connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
J11-2 (B) - J11-1 (GND) |
L - W-B |
Battery power supply |
Always |
11 to 14 V |
|
J11-1 (GND) - 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.
6. CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH
(a) Disconnect the J4 motor connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
J4-2 (B) - J4-1 (GND) |
L - W-B |
Battery power supply |
Always |
11 to 14 V |
|
J4-1 (GND) - 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.
7. CHECK SLIDING ROOF ECU
(a) Disconnect the R5 ECU connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
R5-1 (B) - R5-2 (E) |
L - W-B |
Battery power supply |
Always |
11 to 14 V |
|
R5-2 (E) - 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.
8. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
(a) Disconnect the E29 ECU connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
E29-1 (+B) - E29-17 (E) |
B - W-B |
Battery power supply |
Always |
11 to 14 V |
|
E29-17 (E) - 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.
9. CHECK ID CODE BOX (IMMOBILISER CODE ECU)
(a) Disconnect the E28 ECU connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
E28-1 (+B) - E28-8 (GND) |
B - W-B |
Battery power supply |
Always |
11 to 14 V |
|
E28-8 (GND) - 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.
10. CHECK STEERING LOCK ECU
(a) Disconnect the E26 ECU connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
E26-7 (B) - E26-1 (GND) |
R - W-B |
Battery power supply |
Always |
11 to 14 V |
|
E26-1 (GND) - 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.
11. CHECK AIR CONDITIONING AMPLIFIER (A/C ECU)
(a) Disconnect the E36 amplifier connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
E36-5 (IG+) - E36-1 (GND) |
G - W-B |
IG power supply |
Engine switch off |
Below 1 V |
|
E36-5 (IG+) - E36-1 (GND) |
G - W-B |
IG power supply |
Engine switch on (IG) |
11 to 14 V |
|
E36-6 (+B1) - E36-1 (GND) |
R - W-B |
Battery power supply |
Always |
11 to 14 V |
|
E36-7 (+B2) - E36-1 (GND) |
R - W-B |
Battery power supply |
Always |
11 to 14 V |
|
E36-1 (GND) - 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.
12. CHECK REAR AIR CONDITIONING CONTROL PANEL
(a) Disconnect the E55 switch connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
E55-6 (IG) - E55-1 (E) |
G - W-B |
IG power supply |
Always |
11 to 14 V |
|
E55-1 (E) - 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.
13. CHECK RAIN SENSOR
(a) Disconnect the R11 rain sensor connector.
(b) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
R11-4 (SIG) - Body ground |
G - Body ground |
IG signal circuit (to IG relay) |
Engine switch off |
Below 1 V |
|
Engine switch on (IG) |
11 to 14 V |
|||
|
R11-1 (ES) - Body ground |
W - Body ground |
Ground circuit |
Always |
Below 1 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
14. CHECK WINDSHIELD WIPER ECU
(a) Disconnect the E89 and E90 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 |
|---|---|---|---|---|
|
E89-5 (IG1I) - E90-10 (E) |
G - W-B |
Power source |
Engine switch off |
Below 1 V |
|
E89-5 (IG1I) - E90-10 (E) |
G - W-B |
Power source |
Engine switch on (IG) |
11 to 14 V |
|
E90-10 (E) - Body ground |
W-B - Body ground |
Power ground |
Always |
Below 1 Ω |
If the result is not as specified, there may be a malfunction on the wire harness side.
15. CHECK OVERHEAD JUNCTION BLOCK
(a) Disconnect the R7 junction block connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
R7-16 (GND9) - Body ground |
W-B - Body ground |
Body ground |
Always |
Below 1 V |
|
R7-6 (+B2) - Body ground |
R - Body ground |
Battery power supply |
Always |
11 to 14 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
16. CHECK NO. 2 BODY ECU
(a) Disconnect the L33 ECU connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
L33-7 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
|
L33-14 (B) - Body ground |
R - Body ground |
Battery power supply |
Always |
11 to 14 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
17. CHECK SEAT CLIMATE CONTROL ECU LH (w/ Climate Control Seat System)
(a) Disconnect the c38 ECU connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
c38-12 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
|
c38-2 (B) - Body ground |
G - Body ground |
Battery power supply |
Always |
11 to 14 V |
|
c38-1 (IG) - Body ground |
G - Body ground |
IG power supply |
Engine switch off |
Below 1 V |
|
c38-1 (IG) - Body ground |
G - Body ground |
IG power supply |
Engine switch on (IG) |
11 to 14 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
18. CHECK SEAT CLIMATE CONTROL ECU RH (w/ Climate Control Seat System)
(a) Disconnect the c24 ECU connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
c24-12 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
|
c24-2 (B) - Body ground |
G - Body ground |
Battery power supply |
Always |
11 to 14 V |
|
c24-1 (IG) - Body ground |
G - Body ground |
IG power supply |
Engine switch off |
Below 1 V |
|
c24-1 (IG) - Body ground |
G - Body ground |
IG power supply |
Engine switch on (IG) |
11 to 14 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
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