Continuity Tests
Remove power mirror switch. See POWER MIRROR SWITCH under REMOVAL & INSTALLATION. Using an ohmmeter, check for continuity between appropriate mirror switch terminals. See Fig 1. See POWER MIRROR SWITCH CONTINUITY TEST table. If switch fails any test, replace switch.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002 POWER MIRROR SWITCH CONTINUITY TEST
| Application Type |
Continuity Should Exist Between Terminals No. |
| L/R Switch In OFF Position |
No Continuity |
| L/R Switch In LEFT Position |
| UP |
1 & 2, 4 & 6 |
| DOWN |
1 & 6, 2 & 4 |
| LEFT |
1 & 2, 4 & 7 |
| RIGHT |
1 & 7, 2 & 4 |
| L/R Switch In RIGHT Position |
| UP |
1 & 2, 3 & 4 |
| DOWN |
1 & 3, 2 & 4 |
| LEFT |
1 & 2, 4 & 8 |
| RIGHT |
1 & 8, 2 & 4 |
POWER MIRROR ECU CONTINUITY TEST
| Application Type |
Continuity Should Exist Between Terminals No. |
| Mirror Switch In Rest Position |
A1 & A2, A1 & A3, A8 & A10, A9 & A10, A11 & Ground, A12 & A13, |
| 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 |
POWER MIRROR ECU VOLTAGE TEST
| 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 |