Power Mirror Ecu Circuit Test
- Remove power mirror ECU. Disconnect electrical connectors from power mirror ECU. Check for continuity between specified terminals. See POWER MIRROR ECU CONTINUITY TEST table. See Fig 1. If there is no continuity, repair wiring or component as necessary.
- If there is continuity, reconnect electrical connectors. Check voltage between ground and specified terminals. See POWER MIRROR ECU VOLTAGE TEST table. If voltage is as specified, circuits are okay; replace power mirror ECU. If voltage is not as specified, check wiring and components as necessary. If wiring and components are okay, replace power mirror ECU.
POWER MIRROR ECU CONTINUITY TEST
| Condition |
Terminals |
| Always |
;A1 & A2; A1 & A3; A8 & A10; A9 & A10; A11 & Ground; A12 & A13 |
| Select Switch LEFT |
| UP |
B3 & B6 |
| DOWN |
B1 & B6 |
| LEFT |
B3 & B5 |
| RIGHT |
B1 & B5 |
| Select Switch RIGHT |
| UP |
B2 & B3 |
| DOWN |
B1 & B2 |
| LEFT |
B3 & B4 |
| RIGHT |
B1 & B4 |
POWER MIRROR ECU VOLTAGE TEST
| Terminal |
Condition |
Volts |
| A4 |
Always |
Battery |
| A7 |
Ignition ACC |
Battery |
| A7 |
Ignition OFF |
Zero |
| A1 |
Right Mirror, LEFT |
Battery |
| A2 |
Right Mirror, UP |
Battery |
| A3 |
Right Mirror, RIGHT Or DOWN |
Battery |
| A5 |
Right Mirror, LEFT |
0.0-0.9 |
| A5 |
Right Mirror, RIGHT |
2.8-5.0 |
| A6 |
Right Mirror, DOWN |
2.8-5.0 |
| A6 |
Right Mirror, UP |
0.0-0.9 |
| A8 |
Left Mirror, RIGHT |
Battery |
| A9 |
Left Mirror, UP |
Battery |
| A10 |
Left Mirror, DOWN Or LEFT |
Battery |
| A13 |
Either Mirror, Except OFF |
About 5.0 |
| A14 |
Left Mirror, LEFT |
2.8-5.0 |
| A14 |
Left Mirror, RIGHT |
0.0-0.9 |
| A15 |
Left Mirror, DOWN |
2.8-5.0 |
| A15 |
Left Mirror, UP |
0.0-0.9 |
| B2 |
Always |
About 5.0 |
| B4 |
Always |
About 5.0 |
| B5 |
Always |
About 5.0 |
| B6 |
Always |
About 5.0 |
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002