Lexus IS250 IS220d GSE20 ALE20 - INTERIOR
REAR SUNSHADE SYSTEM - TERMINALS OF ECU
| CHECK REAR SUNSHADE RELAY |
Disconnect the Q24 relay connector.
Measure the voltage and resistance of the wire harness side connector.
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition |
| IG (Q24-1) - E (Q24-5) | Y - W-B | Power source (IG) | Engine switch off | Below 1 V |
| IG (Q24-1) - E (Q24-5) | Y - W-B | Power source (IG) | Engine switch on (IG) | 10 to 14 V |
| SW (Q24-3) - E (Q24-5) | L - W-B | Rear sunshade switch signal | Engine switch on (IG) Rear sunshade switch OFF | 10 kΩ or higher |
| SW (Q24-3) - E (Q24-5) | L - W-B | Rear sunshade switch signal | Engine switch on (IG) Rear sunshade switch ON | Below 1 Ω |
| E (Q24-5) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
If the result is not as specified, there may be a malfunction on the wire harness side connector.
Connect the Q24 relay connector.
Measure the voltage of the wire harness side connector.
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition |
| REV (Q24-2) - Body ground | R - Body ground | Reverse signal | Engine switch on (IG), shift lever on except R | Below 1 V |
| REV (Q24-2) - Body ground | R - Body ground | Reverse signal | Engine switch on (IG), shift lever on R | 10 to 14 V |
| SW (Q24-3) - Body ground | L - Body ground | Rear sunshade switch signal | Engine switch on (IG), rear sunshade switch not pushed | 10 to 14 V |
| SW (Q24-3) - Body ground | L - Body ground | Rear sunshade switch signal | Engine switch on (IG), rear sunshade switch pushed | Below 1.5 V |
If the result is not as specified, there may be a malfunction on the wire harness side connector.