Component Testing

Ignition OFF/Vehicle 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 (or INFO) 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.