SMU - Revised Night Vision Display Always On Diagnostic Table. Cadillac DeVille 2002

Subject:

Revised Night Vision Display Always On Diagnostic Table

Models:

2001-2002 Cadillac DeVille

This bulletin is being issued to revise the Night Vision Display Always On diagnostic table in the Instrument Panel, Gauges and Console sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information.

The following information has been updated within SI2000. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.

Step	Action	Yes	No
Schematic Reference: Night Vision Schematics
1	Did you review the Night Vision Description and Operation and perform the necessary inspections?	Go to Step 2	Go to Symptoms-Instrument Panel, Gauges and Console
2	Position the vehicle approximately 8 meters (25 feet) from the nearest object. Cover the lower windshield with a mat. Cover the ambient light sensor. Turn the ignition ON, with the engine OFF. Turn the head-up display (HUD) ON. Turn the twilight sentinel OFF. Turn the headlamps OFF. Turn the front fog lamps OFF. Does the night vision video image turn OFF?	Go to Step 3	Go to Step 4
3	Turn the headlamps ON. Turn the HUD OFF. Does the night vision video image turn OFF?	Go to Testing for Intermittent and Poor Connections in Wiring Systems	Go to Step 6
4	Turn the ignition OFF. Install a scan tool. Turn the ignition ON, with the engine OFF. With a scan tool, observe the HUD Dimming parameter in the Instrument Panel Module (IPM) Non-HVAC Data data list. Does the HUD Dimming parameter display ON?	Go to Step 11	Go to Step 5
5	Test the HUD active signal circuit of the HUD for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 16	Go to Step 10
6	Turn the ignition OFF. Disconnect the HUD. Turn the ignition ON, with the engine OFF. Turn the HUD switch OFF. Connect a test lamp between the night vision on/off switch signal circuit and a good ground. Does the test lamp illuminate?	Go to Step 8	Go to Step 7
7	Test the night vision on/off switch signal circuit for an open or for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 16	Go to Step 9
8	Test the night vision on/off switch signal circuit for a short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 16	Go to Step 12
9	Test the HUD switch ground circuit for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 16	Go to Step 10
10	Inspect for poor connections at the harness connector of the HUD. Refer to Testing for Intermittent and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 16	Go to Step 14
11	Inspect for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 16	Go to Step 13
12	Inspect for poor connections at the harness connector of the HUD switch. Refer to Testing for Intermittent and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 16	Go to Step 15
13	Important: Program the replacement IPM Replace the IPM. Refer to Instrument Panel Module Replacement in Body Control System. Did you complete the replacement?	Go to Step 16	--
14	Replace the HUD. Refer to Head Up Display Module Replacement. Did you complete the replacement?	Go to Step 16	--
15	Replace the HUD switch. Refer to Head Up Display Switch Replacement. Did you complete the replacement?	Go to Step 16	--
16	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2