| Last Modified: 4-30-2014 | 6.6 J | Doc ID: RM000001FHT000X |
| Model Year: 2006 | Model: LX470 | Prod Date Range: [05/2005 - ] |
| Title: CELLULAR COMMUNICATION: LEXUS LINK SYSTEM: ECU Power Source Circuit; 2006 MY LX470 [05/2005 - ] | ||
|
ECU Power Source Circuit |
DESCRIPTION
This circuit supplies power to operate the mayday ECU assembly.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
INSPECT FUSE (TEL, MET, AM2, ACC) |
(a) Remove the TEL and AM2 fuses from the engine room junction block.
(b) Remove the ACC fuse from the cowl side junction block LH.
(c) Remove the MET fuse from the cowl side junction block RH.
(d) Measure the resistance of the fuses.
Standard resistance:
Below 1 Ω
| NG |
|
|
|
2. |
INSPECT RELAY (Marking: ACC) |
|
(a) Remove the ACC relay from the cowl side junction block LH. |
|
(b) Measure the resistance of the relay.
Standard resistance:
|
Tester connection |
Specified Condition |
|---|---|
|
3 - 5 |
10 kΩ or higher |
|
3 - 5 |
Below 1 Ω (when battery voltage is applied to terminals 1 and 2) |
| NG |
|
|
|
3. |
CHECK WIRE HARNESS (ECU - BATTERY AND BODY GROUND) |
|
(a) Disconnect the M14 ECU connector. |
|
(b) Measure the voltage and resistance of the wire harness side connector.
Standard voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
M14-1 (+B) - Body ground |
Always |
10 to 14 V |
|
M14-13 (IG) - Body ground |
Ignition switch ON |
10 to 14 V |
|
M14-14 (ACC) - Body ground |
Ignition switch ACC |
10 to 14 V |
Standard resistance:
|
Tester Connection |
Specified Condition |
|---|---|
|
M14-12 (E) - Body ground |
Below 1 Ω |
| NG |
|
| OK |
|
REPLACE MAYDAY ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY AND THEN PERFORM REGISTRATION |
|
|