| Last Modified: 7-3-2017 | 6.8:8.0.40 | Doc ID: RM000001BRP001X |
| Model Year Start: 2007 | Model: LX470 | Prod Date Range: [08/2006 - ] |
| Title: LIGHTING: LIGHTING SYSTEM: ECU Power Source Circuit; 2007 MY LX470 [08/2006 - ] | ||
|
ECU Power Source Circuit |
DESCRIPTION
This circuit supplies power to operate the sub body ECU.
|
BECU |
Power source of sub body ECU |
|
SIG |
Power source of sub body ECU |
|
W |
Power source of rear wiper system |
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
INSPECT FUSE (ECU-IG2, RR WIPER, ECU-B2) |
(a) Remove the ECU-IG2, RR WIPER fuses from the cowl side junction block LH.
(b) Remove the ECU-B2 fuse from the cowl side unction block RH.
(c) Measure the resistance of the fuse.
Standard resistance:
Below 1 Ω
| NG |
|
|
|
2. |
CHECK WIRE HARNESS (SUB BODY ECU - BATTERY) |
(a) Disconnect the S26 ECU connector.
(b) Measure the voltage of the wire harness side connector.
Standard voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S26-3 (SIG) - Body ground |
Ignition switch ON |
10 to 14 V |
|
Ignition switch OFF |
Below 1 V |
|
|
S26-2 (W) - Body ground |
Ignition switch ON |
10 to 14 V |
|
Ignition switch OFF |
Below 1 V |
|
|
S26-4 (BECU) - Body ground |
Always |
10 to 14 V |
| OK |
|
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN PROBLEM SYMPTOMS TABLE |
|
|
3. |
CHECK WIRE HARNESS (SUB BODY ECU - BODY GROUND) |
| NG |
|
| OK |
|
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN PROBLEM SYMPTOMS TABLE |
|
|