Town Car V8-4.6L VIN W (1997)
Diagnostic Trouble Code Tests and Associated Procedures/Communication Systems Diagnostics
On-Demand Self-Test
This test is used to verify operation of module being tested.
1. Perform New Generation Star Tester Hookup and Vehicle Selection.
2. Rotate dial to menu item "Diagnostic Data Link" and press trigger.
NOTE: The ignition switch must be in RUN position or test will fail.
3. Select module to test by rotating dial to highlight module and press trigger.
4. Menu item "Diagnostic Test Modes" is highlighted. Press trigger.
5. Rotate dial to highlight menu item "On-Demand Self Test." Press trigger, then press start (Button 3).
6. Prepare the vehicle for entry condition as specified for each module and press trigger.
New Generation Star (NGS) Tester Usage
Rotunda Service Bay Diagnostic System (SBDS), 001-00001 may also be used to diagnose this system.
Vehicle Set Up
1. Perform the following steps prior to running any New Generation Star Driven Diagnostics:
a. Shift transmission to PARK.
b. Apply parking brake.
c. Make sure all switches and controls are in the OFF position.
d. Hook up New Generation Star (NGS) tester.
e. Close all doors, hood and luggage compartment door.
f.
Do not sit in driver seat.
g. Turn ignition switch to RUN.
2. Perform Vehicle Selection procedure.
NOTE: Do not operate any handle, control or switch that may produce a module input unless instructed to do so by New Generation Star
program.
3. Perform Data Link Diagnostic Test under New Generation Star Tester Usage.
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If data link diagnostic test passed and concern(s) remains, go to Step 4.
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If data link diagnostic test did not pass, See: Diagnostic Trouble Code Tests and Associated Procedures/Communication Systems Diagnostics
4. Retrieve continuous DTCs from selected module under New Generation Star Tester Usage-Retrieve/Clear Continuous DTCs.
5. Record all continuous DTCs.
6. Clear all continuous DTCs from selected module under New Generation Star Tester Usage-Retrieve/Clear Continuous DTCs.
7. Perform On-Demand Self-Test procedure for selected module under New Generation Star Tester Usage.
NOTE: The On-Demand Self-Test program for an individual module may produce observable outputs.
8. Record all On-Demand DTCs.
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If DTCs are retrieved, go to the Diagnostic Trouble Code Index for selected module to continue diagnostics.
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If no DTCs are retrieved (On-Demand Self-Test passed) and concern(s) remains, go to Step 9.
9. If continuous DTCs were recorded in Step 5, go to the Diagnostic Trouble Code Index for the selected module to continue diagnosis for all
continuous DTCs. If no continuous DTCs were retrieved, concern is not related to J1850 or ISO 9141 communication network(s) and is not a
module-monitored function. Return to referred section Symptom Chart for non-network related concern.
Wiggle Test
The wiggle test is designed to help identify and locate intermittent failures in the vehicle wiring harness and system components. Upon entering wiggle
test, several inputs and outputs of the module are monitored for change of state. When a state change is encountered, an audible tone can be heard and/or
a diagnostic trouble code (DTC) will be displayed on the New Generation Star (NGS) tester 007-00500. For modules which store DTCs, the DTC
description will determine an open circuit, short to ground or a short to B+. By initiating wiggle test and pulling on different areas of the vehicle harness,
intermittent open and short circuits can be located and serviced.
1. Perform New Generation Star Tester Hookup and Vehicle Selection.
2. Rotate dial to menu item "Diagnostic Data Link" and press trigger.
NOTE: The ignition switch must be in RUN position or test will fail.
3. Select module to test by rotating dial to highlight module and press trigger.
4. Menu item "Diagnostic Test Modes" is highlighted. Press trigger.
5. Rotate dial to highlight menu item "Wiggle Test." Press trigger, then press start (Button 3).
Retrieve PID Information
This test is used to verify operation of input circuitry to the module being tested.
1. Perform New Generation Star Tester hookup and vehicle selection.
