- Telephone ECU assembly
- Mayday battery (backup battery)
- Harness or connector
| Last Modified: 11-27-2007 | 1.6 C | |
| Service Category: Audio/Visual/Telematics | Section: Cellular Communication | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000001EGB00DX |
| Title: CELLULAR COMMUNICATION: LEXUS LINK SYSTEM: DESCRIPTION (2008 LX570) | ||
|
DTC |
6-4 |
Backup Battery Connection Error |
DESCRIPTION
After the engine switch is turned on (IG) and 10 seconds or more have passed, if the telephone ECU assembly does not recognize the mayday battery (backup battery), this DTC is stored.
HINT:
This DTC is only a historic DTC.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
6-4 |
Communication or the communication line is abnormal between the telephone ECU assembly and mayday battery. |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (TELEPHONE ECU ASSEMBLY - MAYDAY BATTERY) |
(a) Disconnect the P3 ECU connector.
(b) Disconnect the P4 battery connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P3-2 (BBI+) - P4-1 (BBO+) |
Always |
Below 1 Ω |
|
P3-9 (BBI-) - P4-2 (BBO-) |
Always |
Below 1 Ω |
|
P3-2 (BBI+) or P4-1 (BBO+) - Body ground |
Always |
10 kΩ or higher |
|
P3-9 (BBI-) or P4-2 (BBO-) - Body ground |
Always |
10 kΩ or higher |
|
|
2. |
REPLACE MAYDAY BATTERY (BACKUP BATTERY) |
(a) Replace the mayday battery
.
(b) Perform registration
.
(c) Check for DTC again
.
OK:
No DTCs output.
|
|
|