Wiper and Washer Switch Inspection
Precautions: Precautions for Working on Rain-Sensing Wiper System · Precautions for Body, Cab and Accessories · General safety (00)
Without Rain-Sensing Wiper
Wiper and washer switch circuit continuity check
Check continuity between terminals at each switch position. If check result is not as specified, replace wiper and washer switch.
Windshield wiper and washer switch
| [A]: | RHD with rear fog light and LHD | [C]: | Terminal |
| [B]: | RHD without rear fog light | [D]: | Switch position |
Rear wiper and washer switch
| [A]: | RHD with rear fog light and LHD | [C]: | Terminal |
| [B]: | RHD without rear fog light | [D]: | Switch position |
Intermittent wiper relay circuit
1)Turn the windshield wiper switch to “INT” position.
2)Connect battery positive (+) terminal to terminal “8” and its negative (–) terminal to terminal “5”.
3)Connect voltmeter positive lead to terminal “7” and its negative lead to terminal “5”.
4)Check that the voltmeter indicates the battery voltage (10 – 14 V).
5)Connect terminal “6” and terminal “8” by a jumper wire.
| [A]: | RHD with rear fog light and LHD | [B]: | RHD without rear fog light |
6)Disconnect end of the jumper wire from terminal “8”.
7)Connect disconnected jumper wire end to terminal “5”, and then check that voltage between terminal “7” and terminal “5” changes as shown.
If check result is not as specified, replace wiper and washer switch.
If check result is not as specified, replace wiper and washer switch.
| [A]: | Wiper interval adjustment switch position |
| [B]: | Voltage |
| [C]: | 1.6 ± 1 sec. |
| [D]: | 10.7 ± 5 sec. |
| [E]: | RHD with rear fog light and LHD |
| [F]: | RHD without rear fog light |
Washer linked wiper circuit
1)Check that windshield wiper switch is at “OFF” position.
2)Connect battery positive (+) terminal to terminal “8” and its negative (–) terminal to terminal “5”.
3)Connect voltmeter positive lead to terminal “7” and its negative lead to terminal “5”.
4)When windshield washer switch is ON, check that voltage changes as shown in figure.
If check result is not as specified, replace wiper and washer switch.
If check result is not as specified, replace wiper and washer switch.
| [A]: | Windshield wiper switch | [D]: | Approx. 0.3 sec. |
| [B]: | Voltage | [E]: | RHD with rear fog light and LHD |
| [C]: | Approx. 2.2 sec. | [F]: | RHD without rear fog light |
With Rain-Sensing Wiper
Wiper and washer switch circuit continuity check
Check continuity between terminals at each switch position. If check result is not as specified, replace wiper and washer switch.
Windshield wiper and washer switch
| [A]: | RHD with rear fog light and LHD | [C]: | Terminal |
| [B]: | RHD without rear fog light | [D]: | Switch position |
Rear wiper and washer switch
| [A]: | RHD with rear fog light and LHD | [C]: | Terminal |
| [B]: | RHD without rear fog light | [D]: | Switch position |
Wiper interval adjustment switch check
Check resistance between terminal “8” and terminal “9” with wiper internal adjustment switch set at each position. If check result is not as specified, replace wiper and washer switch.
| [A]: | RHD with rear fog light and LHD | [C]: | – |
| [B]: | RHD without rear fog light | [D]: | + |
Wiper interval adjustment switch resistance
| Wiper interval adjustment switch position | Resistance |
|---|---|
| 1 | Approx. 0 kΩ |
| 2 | Approx. 2 kΩ |
| 3 | Approx. 5 kΩ |
| 4 | Approx. 8 kΩ |
| 5 | Approx. 10 kΩ |