With Next Generation Star (NGS) Tester
DIAGNOSTIC TROUBLE CODE (DTC) RETRIEVALNew Generation Star (NGS) tester Hook-up Procedure.
NOTE: Make sure Key is OFF.
NGS New Generation Star Tester:
1. Insert the vehicle interface module and program card into the Special Service Tool (SST) New Generation Star (NGS) tester unit.
NGS Hookup To DLC-2:
2. Plug the NGS OBD II adapter into the interface module and the large 5-pin connector into the vehicle Data Link Connector (DLC) located under the dash to left of hood release.
3. Plug the (NGS) tester power cable into the NGS OBD II adapter power cable connector, cigarette lighter or use battery hook-up adapter.
NOTE: Use battery hook-up adapter only when using NGS as voltmeter or ohmmeter. Do not use the adapter to pull DTCs.
NGS System Check Screen:
4. Listen for a double beep. SST (NGS) is now initialized. It will briefly display the system check screen.
RETRIEVING DTC(s)
NOTE: Start engine and bring up to operating temperature before running Quick Test.
1. Perform the necessary vehicle preparation and visual inspection. Hook up SST (NGS) to vehicle.
2. Move the cursor to VEHICLE AND ENGINE SELECTION. Press the trigger key to enter this selection.
3. Move the cursor to SELECT NEW VEHICLE YEAR & MODEL. Press the trigger key to enter this selection.
NGS Screen:
4. Move the cursor to 1996-VIN #1O:T. Press the trigger key to enter this selection.
5. Move the cursor to appropriate model. Press the trigger key to enter this selection.
NGS Display:
6. The vehicle selection screen showing the selected vehicle will be displayed. Move the cursor to the vehicle selected. Press the trigger key.
7. Move the cursor to DIAGNOSTIC DATA LINK in the main menu screen. Press trigger key to enter into menu system diagnostics.
8. Follow operating instructions from the menu. Press trigger to begin data link diagnostic check. This check will tell you if there is proper communication between the NGS Tester and the appropriate monitor. After performing the check, the screen will show if the system passed. See the following chart for a description of the circuits that appear on the screen.
If the system did not pass, the screen will show which monitor is not responding. Press Exit to continue.
NOTE: If you know the monitor is communicating properly, press CANCEL to bypass the system check.
NGS Screen On PCM:
9. Move the cursor to PCM. Press trigger.
NGS Screen On DIAGNOSTIC TEST MODE:
10. Move the cursor to DIAGNOSTIC TEST MODE. Press the trigger key to enter this selection.
NGS Screen Selection:
11. Move the cursor to appropriate mode. Press the trigger key to enter this selection.
12. Retrieve DTCs as follows:
a. Continuous DTCs
b. KOEO DTCs
c. KOER DTCs
NOTE: The first test to run is Retrieve/Clear Continuous DTCs. Record the DTCs on a piece of paper and proceed to the KOEO test.
NOTE: The purpose of recording continuous DTCs at this time is to make sure they are not unintentionally cleared during any KOEO or KOER service. KOEO and KOER codes are always addressed before continuous codes.
RETRIEVE/CLEAR CONTINUOUS DTCs
1. Move the cursor to RETRIEVE/CLEAR CONTINUOUS DTCs.
Press the trigger key to enter this selection.
2. Turn key on. Press START.
3. Follow operating instruction from the menu.
4. If there are DTC(s), refer to Diagnostic Trouble Code Chart for further diagnosis information. After repairs, clear DTCs. Press "C-ALL" (Key #7) button and press trigger.
5. If there are no codes, press CANCEL. Perform KOEO On-Demand Self-Test.
KOEO ON-DEMAND SELF-TEST
1. Move the cursor to KOEO ON-DEMAND SELF-TEST.
Press the trigger key to enter this selection.
2. Turn key on. Press START.
3. Follow operating instruction from the menu.
4. NOTE any KOEO DTCs. Press CANCEL. Perform KOER On-Demand Self-Test.
KOER ON-DEMAND SELF-TEST
1. Move the cursor to KOER ON-DEMAND SELF-TEST. Press the trigger key to enter this selection.
2. Start engine. Press START.
3. Follow operating instruction from the menu and perform BOO, TCS and PSP cycling test, if equipped.
CAUTION:
^ On vehicles equipped with Brake On/Off input, the brake pedal must be depressed and released after KOER ON-DEMAND SELF-TEST is initiated.
^ On vehicles equipped with Transmission Control Switch (TCS), the switch must be cycled after KOER ON-DEMAND SELF-TEST is initiated.
^ On vehicles equipped with Power Steering Switch (PSP) the steering wheel must be turned to the right and left after KOER ON-DEMAND SELF-TEST is initiated.
4. NOTE any KOER DTCs.
5. Press CANCEL several times to return to the main menu.
NGS Clear DTCs:
AFTER REPAIR CLEAR DTCs
1. After repairs have been made, connect SST (NGS) to Data Link Connector.
2. Select Clear Codes function in GENERIC OBD II FUNCTIONS and clear DTCs.
3. Perform Quick Test to ensure customer's concern has been resolved. If DTC P1OOO is present, go to that DTC chart.
PID/DATA MONITOR AND RECORD PROCEDURE
1. Hook up SST (NGS) to Data Link Connector.
2. Perform step 1 through step 9 from "Retrieving DTC(s)".
3. Turn key on or start engine.
NGS Screen PID/DATA MONITOR AND RECORD:
4. Move the cursor to PID/DATA MONITOR AND RECORD. Press the trigger key to enter this selection.
NGS Screen PID Values:
5. Move cursor to PID values to view. Press trigger.
6. Select START to begin.
7. When ready to capture and store the selected PIDs, press the trigger button.
8. Press trigger again when ready to save information.
9. The information is now located in the main recording area. Store to a viewing area before starting another recording or the data will be overwritten.
PLAYBACK OF STORED PIDs
NOTE:
^ Look for abnormal behavior or values that are clearly incorrect. Inspect the signals for abrupt or unexpected changes.
^ Look for agreement in related signals.
^ Make sure the signals act in proper sequence.
Procedure
1. Select VIEW RECORDER AREAS.
2. Select a viewing area.
3. Select up to four PIDs to review in the table format or two PIDs to review in the graph mode.
4. Table Format: Scroll through the PID data while analyzing the information. Look for sudden drops or spikes in the values.
For example:
Typical NGS Screen PID Abnormality:
Notice the major jump in the TP voltage while scrolling through the information. This example would require a smooth and progressive throttle pedal travel during a key ON and engine OFF mode.
NGS - Possible Fault:
5. Graph Format: Scroll through the PID data while analyzing the information. Look for sudden drops or spikes in the linear lines showing the transformation of values to the line graph.
Output Test Mode
1. Hook up SST (NGS) to data link connector.
2. Perform step 1 through step 9 from "Retrieving DTC(s)" procedure.
3. Turn key on.
NGS - Active Command Modes:
4. Move the cursor to ACTIVE COMMAND MODES. Press the trigger key to enter this selection.
5. Move the cursor to OUTPUT TEST MODE. Press the trigger key to enter this selection.
6. Press MODE (Key #3) repeatedly to change the mode from ALL ON to LOW FAN, HIGH FAN, and ALL OFF. Return the mode to ALL ON.
NOTE: LOW FAN and HIGH FAN do not apply, in this application.
7. Press START (Key #4) to run the fuel pump. Press STOP (Key #4) to turn off the fuel pump.
8. To open and close certain actuators in the emission system, press PIDs (Key #7).
9. Press CLEAR (Key #5) to clear previously selected PIDs.
NOTE:
^ To select desired PIDs, place the shaded bar over the item(s) and press trigger. A star symbol appears next to the item when it's selected. Press START (Key #7). The selected PID(s) and value(s) appear.
^ You can only select 30 PIDs at a time.
10. Press START (Key #4) to turn on the fuel pump. Observe the values change from OFF to ON or from 0% to 100%. Press STOP (Key #4) to turn off the fuel pump.
11. Press CANCEL.
OXYGEN SENSOR MONITORING TEST RESULTS ACCESS
NOTE: The Oxygen Sensor Monitoring Test Results allows access to the on-board oxygen sensor fault limits and actual values during OBD II drive cycle.
1. Hookup SST (NGS) to data link connector.
2. Select VEHICLE AND ENGINE SELECTION.
3. Select NEW VEHICLE YEAR & MODEL. Select year, engine, model with appropriate qualifier, if needed.
4. Turn key on.
5. Move cursor to GENERIC OBD II FUNCTIONS. Press trigger key to enter this selection.
6. Select OXYGEN SENSOR TESTS. Press trigger.
7. Select MANUFACTURING SPECIFIC TEST ID. Press trigger.
8. Scroll up to the test number (41 H) and press trigger.
OBD II DRIVE CYCLE
NOTE: Only perform this procedure when instructed to do so.
1. Start the engine.
2. Drive vehicle in any mode for 4 minutes.
3. Monitor ECT PID drive vehicle until ECT PID reaches 0.6 volts (180°F (82°C)) or greater.
4. Idle for 80 seconds.
5. Accelerate to 45 mph at 1/4-1/2 throttle for approximately 8 seconds.
6. Drive at a speed between 30 and 45 mph for 4 minutes.
7. Drive for 1 minute in the range of 30 to 40 mph at steady throttle.
8. Decelerate and idle for 80 seconds.
9. Accelerate to 55 mph at 1/4-1/2 throttle for approximately 8 seconds.
10. Decelerate at closed throttle for 10 seconds.
11. Accelerate to 55 mph at 1/4-1/2 throttle for approximately 8 seconds.
12. Decelerate at closed throttle for 10 seconds.
13. Accelerate back to steady throttle mode at 1/4-1/2 throttle for approximately 8 seconds.
14. Cruise at a speed between 40 and 60 mph (posted speed) for 5 minutes at steady throttle.
15. Drive at 25-40 mph with at least 6 stops for 10 minutes.
16. Decelerate and idle.
17. With the ignition key ON (vehicle at idle or engine off), check for Retrieve/Clear Continuous DTCs.
NOTES:
(1) DTC PO103 could be generated by foreign material blocking the MAF sensor screen causing an air flow restriction. If contaminants are found on the screen, check air filter installation in air cleaner tray and proper sealing of air cleaner and air tubes before proceeding.
(2) DTC P1101 could be generated by a low charged vehicle battery or the garage exhaust ventilation system. Service the battery as necessary. Then remove ventilation system and properly vent to outside atmosphere.
(3) An EPC solenoid that is shorted to ground may result in a false vehicle speed sensor code (DTC P1500 or P15O1). Diagnose the EPC solenoid first, then recheck the VSS.
(4) 3.0L and 4.0L models have been built without a PSP switch. Disregard servicing DTCs P1650 or P1651.
CAUTION: After repairing a failure, perform the After Repair Procedure to verify the fault has been corrected.