Lighting System Afs Ecu Power Source Circuit
Lighting. Lexus Is250, Is220D. Gse20 Ale20
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT AFS ECU
CHECK WIRE HARNESS (AFS ECU - BODY GROUND)
INSPECT AFS ECU
LIGHTING SYSTEM - AFS ECU Power Source Circuit |
DESCRIPTION
This circuit detects the state of the engine switch. The AFS ECU receives it from the engine switch.
WIRING DIAGRAM
INSPECTION PROCEDURE
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection
| Condition
| Specified Condition
|
A27-1 (E1) - A27-2 (IG)
| Engine switch off
| Below 1 V
|
A27-1 (E1) - A27-2 (IG)
| Engine switch on (IG)
| 10 to 14 V
|
| OK |
|
|
|
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
|
| 2.CHECK WIRE HARNESS (AFS ECU - BODY GROUND) |
Disconnect the A27 AFS ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection
| Condition
| Specified Condition
|
A27-1 (E1) - Body ground
| Always
| Below 1 Ω
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (AFS ECU - BODY GROUND) |
|
|
Disconnect the A27 AFS ECU connector.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection
| Condition
| Specified Condition
|
A27-1 (E1) - A27-2 (IG)
| Engine switch on (IG)
| 10 to 14 V
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (AFS ECU - BATTERY) |
|
|
