Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Navigation System Schematics | ||||
DEFINITION: The navigation display head (NDH) screen is blank, distorted or the colors are not correct. | ||||
1 | Did you perform Diagnostic System Check - Navigation System ? | -- | Go to Step 2 | |
2 |
Does the system operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Is the resistance within the specified range for each circuit? | 70-80ohms | Go to Step 8 | Go to Step 4 |
4 | Test each video color signal circuit for an open, a short to ground or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 5 |
5 | Test the video reference circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 6 |
6 | Inspect for poor connections at the harness connector of the navigation display head (NDH). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 7 |
7 | Replace the navigation display head (NDH). Refer to Navigation Display Module Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
8 | Inspect for poor connections at the harness connector of the navigation module (NAV). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 9 |
9 | Replace the navigation module (NAV). Refer to Navigation Data Processor Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
10 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
