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 continuity does not exist, repair wiring or component as necessary.
- If continuity exists, reconnect electrical connectors. Measure voltage between ground and specified terminals. See POWER MIRROR ECU VOLTAGE TEST table. If voltage is not as specified, check wiring harness and components as necessary. If wiring harness 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 |
| Left Switch |
| Up |
B3 & B6 |
| Down |
B1 & B6 |
| Left |
B3 & B5 |
| Right |
B1 & B5 |
| Right Switch |
| Up |
B2 & B3 |
| Down |
B1 & B2 |
| Left |
B3 & B4 |
| Right |
B1 & B4 |
POWER MIRROR ECU VOLTAGE TEST
| Terminal |
Condition |
Volts |
| A1 |
Right Mirror, Left |
Battery |
| A2 |
Right Mirror, Up |
Battery |
| A3 |
Right Mirror, Right Or Down |
Battery |
| A4 |
Always |
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 |
| A7 |
Ignition ACC |
Battery |
| A7 |
Ignition Off |
Zero |
| 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