Volkswagen New Beetle. Manual - part 52

 

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Volkswagen New Beetle. Manual - part 52

 

 

2. Start engine. Allow engine to idle with transmission in Park or Neutral for 40 seconds.  

3. The following conditions must be followed to run certain OBD-II monitors that require engine to be 

under a load. On A/T models, select OVERDRIVE CANCEL to perform test in 3rd gear. On all models, 
turn on accessories (headlights, A/C compressor, blower fan, etc.). DO NOT use hazards or PTO. Select 
an uphill or level road. DO NOT select a downhill road. Driving downhill will unload engine and defeat 
test.  

4. Accelerate steadily to 3rd gear (A/T) or 4th gear (M/T) and keep engine speed at 1500 RPM for 3 

seconds. Accelerate steadily from 35 MPH to 65 MPH in about 15 seconds (A/T) or 11 seconds minimum 
(M/T). Repeat this procedure 3 times while maintaining conditions set in step 3) . Before proceeding, turn 
all accessories off and disengage OVERDRIVE CANCEL. On A/T models, go to next step. On M/T 
models, go to step 6 .  

5. On A/T models, drive vehicle in 4th gear continuously for one minute. Accelerate steadily from a full 

stop to 4th gear and then return to a full stop. Repeat this procedure 10 times, then go to next step.  

6. Before continuing, use NGS tester and select EOT PID from PID/DATA MONITOR & RECORD menu. 

Ensure EOT PID value is more than 140°F (60°C). Allow engine to idle for 20 seconds in Park or 
Neutral. Turn ignition off. Start engine and allow engine to idle for 40 seconds in Park or Neutral. Repeat 
QUICK TEST in appropriate SELF-DIAGNOSTICS article. Drive cycle is complete.  

7. If DTC P1000 is present after performing drive cycle, repeat step 4 maintaining a minimum MFDES PID 

value of 37 milligrams/stroke with engine speed at more than 1500 RPM for 11 seconds. Also, maintain a 
minimum MFDES of 37 milligrams/stroke with engine speed at more than 2300 RPM for at least 6 
seconds. Repeat step 6 . MFDES PID value must remain less than 12 milligrams/stroke for 11 seconds.  

GENERAL MOTORS 

DRIVE CYCLE (1996-2000 MODELS) 

Description 

Several states require that a vehicle pass On-Board Diagnostic (OBD) system tests and the I/M emission 
inspection in order to renew license plates. This is accomplished by viewing the I/M system status display on a 
scan tool. Using a scan tool, the technician can observe the I/M system status in order to verify that the vehicle 
meets the criteria that complies with the local area requirements.  

The System Status display indicates only if the PCM has completed the required tests (DTCs). The System 
Status display does not necessarily mean that the test has passed. If a failure indication is present for a DTC 
associated with one of the systems, that test has failed. Diagnosis and repair are necessary in order to meet the 
I/M requirement. Verify that the vehicle passes all of the diagnostic tests associated with the displayed System 
Status prior to returning the vehicle to the customer. 

WARNING:

Strict observance of posted speed limits and attention to driving 
conditions are mandatory when proceeding through the following drive 
cycles. 

NOTE:

A Drive Cycle may be referred to as Inspection/Maintenance (I/M) Complete 
System Set Procedure. 

 

1998 Chevrolet Pickup C1500 

DRIVE CYCLES OBD-II Vehicles - OBD-II Readiness Monitors

  

Conditions for Updating I/M System Status 

Each system requires at least one, and sometimes several, diagnostic tests. The results of these tests are reported 
by a Diagnostic Trouble Code (DTC). A system monitor is complete when either all of the DTCs comprising 
the monitor have run and passed, or any one of the DTCs comprising the monitor have illuminated the MIL. 
Once all of the tests are completed, the I/M System Status display will indicate YES in the COMPLETED 
column. For example, when the HO2S Heater Test indicates YES, all of the oxygen sensor heaters have been 
diagnosed. If the vehicle has four heated oxygen sensors, all four heater circuits have been diagnosed. The I/M 
System Status will indicate NO under the Completed column when any of the required tests for that system 
have not run. The following is a list of conditions that would set the I/M system status indicator to NO:  

z

The vehicle is new from the factory and has not yet been driven through the necessary drive conditions to 
complete the tests.  

z

The battery has been disconnected or discharged below operating voltage.  

z

The control module power or ground has been interrupted.  

z

The control module has been reprogrammed.  

z

The control module DTCs have been cleared as part of a service procedure.  

Monitored Emission Control Systems 

The OBD-II System monitors all emission control systems that are on-board. Not all vehicles have a full 
complement of emission control systems. For example, a vehicle may not be equipped with secondary Air 
Injection (AIR) or Exhaust Gas Recirculation (EGR). The OBD-II regulations require monitoring of the 
following:  

z

Air conditioning system.  

z

Catalytic converter efficiency.  

z

Comprehensive component monitoring. Emission related inputs and outputs.  

z

Evaporative (EVAP) emissions system.  

z

Exhaust Gas Recirculation (EGR) system.  

z

Fuel delivery system.  

z

Heated catalyst monitoring.  

z

Misfire monitoring.  

z

Oxygen Sensor system (O2S or HO2S).  

z

Oxygen sensor heater system (HO2S heater).  

z

Secondary Air Injection (AIR) system.  

Systems such as fuel delivery, misfire, and comprehensive components may not be listed in a system status list. 
These tests run continuously on some vehicles and may not require an indicator.  

Drive Cycle 

 

1998 Chevrolet Pickup C1500 

DRIVE CYCLES OBD-II Vehicles - OBD-II Readiness Monitors

  

Fig. 2: Typical Drive Cycle (1996-2000 GM Vehicles - Except Metro, Prizm, Saturn & Tracker) 
Courtesy of GENERAL MOTORS CORP. 

DRIVE CYCLE (2001-2003 MODELS) 

Description 

The following procedure is designed to satisfy the enable criteria necessary to execute all of the I/M readiness 
diagnostics, and complete the trips for those particular diagnostics. When all diagnostic tests are completed, the 
I/M System Status indicators are set to YES. Perform this test when more than one or all of the I/M System 
Status indicators are set to NO.  

Rough road conditions may prevent some of the tests from running. Extreme high or low ambient temperatures 
may prevent tests such as Heated Oxygen Sensor (HO2S) heater and Evaporative Emission (EVAP) system 
from initiating. If a step is interrupted before completion, perform the remaining portion of the set procedures. 
Any portion of the set procedure that requires the engine at operating temperature may be repeated. This allows 
most of the diagnostics to run and the remaining tests can be performed using the individual System Set 
Procedures.  

If the vehicle has recently run, start the Drive Cycle Procedure at step 3. This will allow the tests that require the 
engine at operating temperature to run. Using this method allows shorter cool down periods if the tests requiring 
a cold start do not initiate.  

The scan tool can be used to monitor each of the I/M System Status indicators during the Drive Cycle 
Procedure. When all of the indicators for a test step have updated to YES, testing can move on to the next step 
even if the remaining portion of the test is not complete. For example, step 3 is designed to run the Evaporative 
Emission (EVAP), Secondary Air Injection (AIR), and Heated Oxygen Sensor (HO2S) tests. The procedure 
instructs the technician to operate the vehicle in the enable conditions for 6 minutes. If all 3 tests have updated 
to YES within 4 minutes, it is not necessary to continue with the enable conditions and testing can advance to 

 

1998 Chevrolet Pickup C1500 

DRIVE CYCLES OBD-II Vehicles - OBD-II Readiness Monitors

  

the next step.  

Enable Conditions 

z

Barometric Pressure (BARO) is greater than 74 kPa.  

z

Engine Coolant Temperature (ECT) is less than 75°F (24°C).  

z

Intake Air Temperature (IAT) is less than 75°F (24°C).  

z

The difference between the IAT and the ECT is 11°F (6°C) or less.  

z

The battery voltage is 9-18 volts.  

z

The fuel level is between 1/4 and 3/4.  

Inspection/Maintenance (I/M) System Check 

Any DTCs set may prevent the required monitors from running. In most cases, anytime a control module is 
reprogrammed or the DTCs are cleared as part of a repair procedure, all the I/M system status indicators will 
reset to NO. Prior to performing Drive Cycle Procedure (Inspection/Maintenance Complete System Set 
Procedure), perform Inspection/Maintenance System Check. See Fig. 3 

NOTE:

It may not be necessary to meet all conditions below to enable specific 
monitors to run an individual diagnostic test. For more information on enable 
conditions for running specific monitors, see SELF DIAGNOSTIC SYSTEM in 
appropriate SELF DIAGNOSTICS article. 

 

1998 Chevrolet Pickup C1500 

DRIVE CYCLES OBD-II Vehicles - OBD-II Readiness Monitors

  

 

 

 

 

 

 

 

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