For 1990-2009 cars

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
1 | Check the fuse Ef2. Is fuse Ef2 blown? | -- | Go to Step 2 | Go to Step 3
2 | Replace fuse Ef2. Is the repair complete? | -- | System OK | --
3 |

1. Remove the controller.
2. Measure the voltage between connectors A14.

Is the voltage within the specified value?

11-14 V

Go to Step 4

Go to Step 5

4 |

1. Check the controller for damage.
2. Replace the controller if it is damaged.

Is the repair complete?

--

System OK

--

5 | Check the voltage between terminal A1 and ground. Is this voltage as specified? | 0 V | Go to Step 6 | Go to Step 7
6 |

1. Check the wiring harness between fuse F19 and the terminal A14 for damage.
2. Replace the wiring harness if it is damaged.

Is the repair complete?

--

System OK

--

7 |

1. Check the wiring harness between terminal A14 and ground G203 for damage.
2. Repair the wiring harness, or ground connection as required.

Is the repair complete?

--

System OK

--