DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - BATTERY)
CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - BODY GROUND)
CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - COWL SIDE J/B RH)
DTC B2620 ECU Power Source Circuit Malfunction
DESCRIPTION
The ECU power source circuit supplies positive voltage to the multiplex tilt & telescopic ECU.
| DTC No. | Detection Item | Trouble Area |
| B2620 | The voltage of the ECU power source drops to 8 V or less and this condition continues for 10 sec. or more. | Battery
Wire harness or connector
Multiplex tilt & telescopic ECU
|
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - BATTERY) |
Disconnect the J28 connector from the multiplex tilt & telescopic ECU.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester connection
(Terminal No.) | Condition | Specified value |
| ECUB (J28-9) - Body ground | Always | 10 to 14 V |
| 2.CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - BODY GROUND) |
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester connection
(Terminal No.) | Condition | Specified value |
| GND (J28-11) - Body ground | Always | Below 1 Ω |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| REPLACE MULTIPLEX TILT & TELESCOPIC ECU |
|
| 3.CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - COWL SIDE J/B RH) |
Disconnect the RA connector from the main body ECU RH (cowl side J/B RH).
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester condition
(Terminals No.) | Condition | Specified value |
| ECUB (J28-9) - RA-18 | Always | Below 1 Ω |
| ECUB (J28-9) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - COWL SIDE J/B RH) |
|
|
| OK | |
| |
| REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - COWL SIDE J/B RH) |
|
LEXUS IS250, IS220d / GSE20 ALE20
