For 1990-2009 cars

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
1 |

1. Turn the ignition ON.
2. Turn the wiper switch to AUTO.

Using a voltmeter, measure that the battery voltage is available at the Rain Sensor Unit connector terminal 5.

--

Go to Step 5

Go to Step 2

2 | Inspect for an open circuit between wiper switch connector terminal B2 (B1:W/O REAR FOG) and the Rain Sensor Unit Connector terminal 5. Is the circuit open? | -- | Go to Step 4 | Go to Step 3
3 | Replace the wiper switch. Did you complete the replacement? | -- | System OK | --
4 | Repair the open circuit between the wiper switch connector terminal B2 (B1:W/O REAR FOG) and the Rain Sensor Unit connector terminal 5. Did you complete the repair? | -- | System OK | --
5 |

1. Turn the ignition ON.
2. Turn the wiper switch to AUTO.

Using a voltmeter, measure the battery voltage pulsing at wiper motor connector terminal 2.

--

Go to Step 7

Go to Step 6

6 | Replace the wiper motor. Did you complete the replacement? | -- | System OK | --
7 |

1. Turn the ignition ON.
2. Observe the voltage at the wiper switch connector terminal A6.

Is the voltage pulsating at the specified valve?

--

Go to Step 8

Go to Step 9

8 | Replace the faulty wiper switch. Did you complete the replacement? | -- | System OK | --
9 | Repair the open circuit between the wiper switch and the wiper motor. Did you complete the repair? | -- | System OK | --