Component Testing

Ignition OFF, disconnect the harness connector at the S27 Head-Up Display Switch.
Test for 3.4K - 4.2K Ω between the signal terminal 4 and the low reference terminal 3.
- If not between 3.4K - 4.2K Ω
  Replace the S27 Head-Up Display Switch.
- Go to next step: If between 3.4K - 4.2K Ω
Test for 87 - 107 Ω between the signal terminal 4 and the low reference terminal 3 with the Dim + switch pressed.
- If not between 87 - 107 Ω
  Replace the S27 Head-Up Display Switch.
- Go to next step: If between 87 - 107 Ω
Test for 291 - 356 Ω between the signal terminal 4 and the low reference terminal 3 with the Dim - switch pressed.
- If not between 291 - 356 Ω
  Replace the S27 Head-Up Display Switch.
- Go to next step: If between 291 - 356 Ω
Test for 575 - 704 Ω between the signal terminal 4 and the low reference terminal 3 with the Up switch pressed.
- If not between 575 - 704 Ω
  Replace the S27 Head-Up Display Switch.
- Go to next step: If between 575 - 704 Ω
Test for 1K - 1.2K Ω between the signal terminal 4 and the low reference terminal 3 with the Down switch pressed.
- If not between 1K - 1.2K Ω
  Replace the S27 Head-Up Display Switch.
- Go to next step: If between 1K - 1.2K Ω
Test for 1.7K - 2.1K Ω between the signal terminal 4 and the low reference terminal 3 with the Page switch pressed.
- If not between 1.7K - 2.1K Ω
  Replace the S27 Head-Up Display Switch.
- Go to next step: If between 1.7K - 2.1K Ω
All OK.