Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics | ||||
1 | Did you perform the Lighting System Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Do the low beam headlamps illuminate? | -- | Go to Step 3 | |
3 |
Do the low beam headlamps illuminate? | -- | Go to Step 4 | Go to Step 5 |
4 | Turn OFF the ignition. Did the headlamps remain illuminated by the twilight sentinel delay feature? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 9 |
5 |
Does the scan tool indicate that the Twilight Switch parameter is ON? | -- | Go to Step 7 | Go to Step 6 |
6 |
Does the scan tool indicate that the Twilight Switch parameter is ON? | -- | Go to Step 16 | Go to Step 15 |
7 |
Does the scan tool indicate that the Twilight Switch parameter is OFF? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 8 |
8 |
Does the scan tool indicate that the Twilight Switch parameter is OFF? | -- | Go to Step 16 | Go to Step 15 |
9 |
Does the scan tool indicate that the Twilight Delay parameter is within the specified range? | 3-234 Counts | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 10 |
10 |
Does the scan tool indicate that the Twilight Delay parameter is greater than the specified value? | 234 Counts | Go to Step 11 | Go to Step 12 |
11 |
Does the scan tool indicate that the Twilight Delay parameter is greater than the specified value? | 3 Counts | Go to Step 13 | Go to Step 16 |
12 | Test the twilight sentinel delay signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 17 |
13 | Test the twilight sentinel delay signal circuit for a short to voltage, a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 14 |
14 | Test the low reference circuit of the twilight delay switch for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 17 |
15 | Test the twilight sentinel enable signal circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 17 |
16 | Inspect for poor connections at the harness connector of the headlamp switch. 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 20 | Go to Step 18 |
17 | Inspect for poor connections at the harness connector of the Instrument Cluster (IPC). 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 20 | Go to Step 19 |
18 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? | -- | Go to Step 20 | -- |
19 | Replace the Instrument Cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console. Did you complete the replacement? | -- | Go to Step 20 | -- |
20 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
