Land Cruiser & Lexus LX470
Disconnect sun roof ECU 10-pin connector. ECU is located behind overhead console. Check for continuity or voltage as indicated at ECU wiring harness connector terminals with sun roof switch in specified positions. See SUN ROOF ECU TEST table. If test results are as specified, sun roof ECU circuits are okay. Replace sun roof ECU. If test results are not as specified, repair or replace appropriate switch or wire. See Fig 1.
SUN ROOF ECU TEST
| Terminal No. & Switch Position | Specification | ||||
|---|---|---|---|---|---|
| 3 (1) | |||||
| Tilt | |||||
| Off Or Up | No Continuity | ||||
| Down | Continuity | ||||
| 4 (1) | |||||
| Tilt | |||||
| Off Or Down | No Continuity | ||||
| Up | Continuity | ||||
| 5 (1) | Battery Voltage | ||||
| 7 (1) | Continuity | ||||
| 8 (1) | |||||
| Ignition Switch LOCK Or ACC | No Voltage | ||||
| Ignition Switch ON | Battery Voltage | ||||
| 9 (1) | |||||
| Slide | |||||
| Off Or Close | No Continuity | ||||
| Open | Continuity | ||||
| 10 (1) | |||||
| Slide | |||||
| Off Or Open | No Continuity | ||||
| Close | Continuity | ||||
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