Power Mirror Ecu Test
- Remove power mirror ECU. See POWER MIRROR ECU under REMOVAL & INSTALLATION. Disconnect ECU harness connectors. Using an ohmmeter, check for continuity at specified terminals. See POWER MIRROR ECU CONTINUITY TEST table.
- Reconnect ECU harness connectors. Using a voltmeter, check for voltage at specified terminals. See POWER MIRROR ECU VOLTAGE TESTING table. See Fig 1. If continuity or voltage readings are not as specified, check wiring. If wiring is okay, replace power mirror ECU.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002 POWER MIRROR ECU CONTINUITY TEST
| Application |
Terminals |
| Mirror Switch In Rest Position |
A1 & A2, A1 & A3, A8 & A10, A9 & A10, A11 & Ground, A12 & A13, & A16 |
| Left Mirror Switch Activated |
| Up |
B3 & B6 |
| Down |
B1 & B6 |
| Left |
B3 & B5 |
| Right |
B1 & B5 |
| Right Mirror Switch Activated |
| Up |
B2 & B3 |
| Down |
B1 & B2 |
| Left |
B3 & B4 |
| Right |
B1 & B4 |
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002 POWER MIRROR ECU VOLTAGE TESTING
| Application |
Terminals |
Volts |
| At All Times |
A4 |
Battery |
| Ignition Switch |
| In ACC Position |
A7 |
Battery |
| In OFF Position |
A7 |
Zero |
| Left Or Right Mirror Switch (Any Position Except OFF) |
A13 |
5.0 |
| Left Mirror Switch Activated |
| Up |
A9 |
Battery |
| Down Or Left |
A10 |
Battery |
| Right |
A8 |
Battery |
| Right Mirror Switch Activated |
| Up |
A2 |
Battery |
| Down Or Right |
A3 |
Battery |
| Left |
A1 |
Battery |
| Left Mirror |
| Uppermost Position |
A15 |
0-0.9 |
| Lowermost Position |
A15 |
2.8-5.0 |
| Leftmost Position |
A14 |
2.8-5.0 |
| Rightmost Position |
A14 |
0-0.9 |
| Right Mirror |
| Uppermost Position |
A6 |
0-0.9 |
| Lowermost Position |
A6 |
2.8-5.0 |
| Leftmost Position |
A5 |
0-0.9 |
| Rightmost Position |
A5 |
2.8-5.0 |
| Mirror Switch At Rest Position |
B2, B4, B5 & B6 |
5.0 |