Page 1 of 7 SUBJECT : OBD II DRIVE CYCLE DATE: May, 2003 No: MODEL: 1996 98 models CIRCULATE TO: [ ] GENERAL MANAGER [ ] PARTS MANAGER [X] TECHNICIAN [X] SERVICE ADVISOR [X] SERVICE MANAGER [X] WARRANTY PROCESSOR [ ] SALES MANAGER PURPOSE This bulletin supercedes TSB 00 13 005, to update the OBD II drive cycle procedures. New information is indicated by. Since January 2001, the U.S. Environmental Protection Agency (EPA) requires that vehicles must have all OBD II Readiness Codes complete at the time of an I/M test ( smog check ). States with I/M programs are not required to use OBD II inspection, and can use tailpipe inspections, but EPA encourages using OBD II. Some states have less stringent air quality requirements or localized programs. Many states already have OBD II I/M programs in place, and more are added every year. Refer to the web site www.obdclearinghouse.com to identify states that currently have an OBD II I/M program in place. During the OBD II drive cycle, the OBD II system checks each emission control system by monitoring it for proper operation. It is necessary to run the OBD II drive cycle: To confirm that a fuel related or emission related diagnostic trouble code (DTC) repair was successful. If the vehicle s I/M test results indicate that the OBD II Readiness Monitors are incomplete. Instructions in this bulletin describe how to drive the vehicle to complete the oxygen sensor monitor, EGR monitor, catalyst monitor, Evaporative Emission Control purge flow monitor, and Evaporative Emission Control (Strict) System Leak (EVAP) monitor. All of these monitors except the Strict Evap must be completed on the first drive cycle. After that, when each monitor is completed on the next drive cycle, the scan tool Readiness Test screen will display the monitor as complete ( CMP ). If none of the OBD II monitors show Complete, the technician may want to choose Increased Sensitivity mode on the scan tool and follow the drive cycles for completing Readiness. This will help to confirm that all monitors will run and Complete during one drive cycle. The Increased Sensitivity mode is for testing purposes only, and will erase all Readiness when exiting from this mode or turning the ignition to OFF. This bulletin contains: OBD II drive cycle procedures for 1996 98 affected vehicles only (Refer to the appropriate service manual for 1998 and later model OBD II drive cycle procedures.) Warranty claim information for OBD II drive cycle on all affected vehicles. NOTE: On 1996 97 V6 models, after all Readiness codes are complete, turning the ignition off will cause all the Readiness status readings to show incomplete ( INCMP ). This may require that an I/M test be performed before the ignition key is turned off, or the technician can complete all but the catalyst monitor before returning the vehicle to the customer for I/M testing. AFFECTED VEHICLES 1996 1998 Montero, Montero Sport, Diamante, Truck, 3000GT, Mirage, Galant, Expo/Expo LRV, and Eclipse models (except 2.0L non turbo 420A engine models) (Refer to TSB 03 13 006 for reprogramming to retain OBD II Readiness Codes on 420A models.) FILE UNDER: Group 13 Fuel in the Dealer Service Information Binder (2579)
Page 2 of 7 Questions regarding OBD II Readiness codes and drive cycles should be directed to Tech Line at 1 800 446 6064. PROCEDURE (1996 1998 AFFECTED VEHICLES ONLY) For 1998 and later models, refer to Group 13 in the appropriate service manual, under OBD II Drive Cycle. CAUTION This procedure requires two people in the vehicle during the drive cycle. One person must drive within the drive cycle parameters while the other person reads the scan tool (MUT II or MUT III). IMPORTANT: In order to carry out the OBD II drive cycle, the ambient temperature must be higher than 10 degrees C (14 degrees F), and all electrical components must be turned off. The following instructions describe how to drive the vehicle to complete the oxygen sensor monitor, EGR monitor, catalyst monitor, Evaporative Emission Control purge flow monitor, and Evaporative Emission Control (Strict) System Leak (EVAP) monitor. All of these monitors except the Strict Evap must be completed on the first drive cycle. After that, when each monitor is completed on the next drive cycle, the scan tool Readiness Test screen will display the monitor as complete ( CMP ). Refer to the chart on page 7 to determine the vehicle s type of evaporative emission control monitor. On vehicles with purge flow evaporative emission control monitor, the purge flow monitor must be completed first during the first and second drive cycles. On vehicles with strict evaporative emission control monitor, the strict evap monitor should be completed first after the first drive cycle is completed because it requires a cold start. If all of these monitors (Readiness Tests) are incomplete ( INCMP ) on the scan tool status screen before you begin the drive cycle, the scan tool will not indicate any change in their status during the first drive cycle. If any of the monitors are already complete, then all of the monitors have been completed at least once. Before you begin the drive cycle, check the scan tool Readiness Test status screen frequently while driving. Watch for the status to change to complete ( CMP ). 1. With the ignition switch off, connect the scan tool. Check for any DTCs. If any are present, note the DTC(s), then clear all DTCs from the PCM memory. 2. Turn the ignition on, and observe the Readiness Test status on the scan tool by following the scan tool selection sequence below:
Page 3 of 7 3. Evaporative Emission Control Monitor The Readiness Test status is displayed on the scan tool. Perform those Readiness Tests (Monitors) which are incomplete ( INCMP ). NOTE: On the first drive cycle, perform all monitor drive cycles within the same key cycle. (Do not turn the engine off and back on between drive cycles.) IMPORTANT: Refer to the chart on page 7 to identify the type of evaporative emission control monitor used on the vehicle. Use the appropriate evaporative emission control monitor (Strict Evap or Purge Flow). a. Strict Evap Leak Monitor This monitor must be completed after the first drive cycle is completed, and within 16 minutes after initial engine start up. This monitor is controlled by a timer in the PCM, which enables the monitor to run for only 16 minutes. The following conditions must be met for this monitor: Engine coolant temperature 30 degrees C (86 degrees F) or less (COLD START) Ambient temperature 5 30 degrees C (41 86 degrees F) A/T select lever in D range, with Overdrive switch ON Fuel tank 30 50% full is recommended After initial start up, immediately begin driving on level ground (no hills) at approximately 55 mph. Do not rapidly accelerate or decelerate. Do not turn corners or change lanes. If fuel sloshing occurs, this monitor must be restarted. b. Purge Flow Monitor If this procedure is started just after the other monitors are completed, stop the vehicle and allow to idle for 5 minutes at the conditions listed below. If this procedure is started with the ignition key turned to OFF, start the engine and wait for the coolant temperature to reach over 180 degrees F. Then drive the vehicle at more than 20 mph for 120 seconds. Then stop the vehicle and allow to idle for 5 minutes at the conditions listed below. Vehicle conditions must be: Shift lever in Park or Neutral No electrical load (A/C, fan and all accessories are off. ) Do not apply brake pedal. Steering wheel is at center. Scan tool readings must be: IAC valve position stable between 10 and 30 steps. Closed loop TPS approximately 0.5 (idle switch is ON) Engine coolant temperature greater than 170 degrees F
Page 4 of 7 4. Oxygen Sensor Monitor: a. Start the engine and allow to idle until the coolant temperature reaches at least 82 degrees C (180 degrees F). b. Drive at 40 mph for two minutes. Engine load must be 25 60% (except 22% 60% on Mirage 1.8L M/T models). On Mirage 1.5L models, MAP sensor reading must be 7.8 19.8 inhg. Engine speed must be as follows: Model A/T M/T Galant, Eclipse, Expo, Truck 1100 3000 rpm 1500 3000 rpm Mirage 1.5L 1400 3200 rpm 1600 3000 rpm Mirage 1.8L 1400 3000 rpm 1600 3000 rpm Diamante, Montero, Montero Sport 1100 3000 rpm 1250 3000 rpm Model Non Turbo Turbocharged 3000GT 1250 3000 rpm 1500 3000 rpm 5. EGR Monitor: a. Be sure the engine coolant temperature is at least 82 degrees C (180 degrees F). b. Drive at 40 mph, at engine speeds between 2400 2600 rpm, for 20 seconds. On A/T models, it may be necessary to set the overdrive to OFF. c. Release the accelerator pedal and reduce speed to 20 mph. The following conditions must be met for 5 seconds: Idle switch: ON Engine speed 2000 rpm or less, except 1700 rpm or less for Mirage 1.8L Engine load: 15% or less (M/T); 20% or less (A/T) Galant, Expo, Eclipse, Mirage, Truck Engine load: 18% or less (M/T); 28% or less (A/T) 3000GT, Diamante, Montero, and Montero Sport For Mirage 1.5L only: MAP sensor reading 10.2 inhg or less (M/T); 13.7 inhg or less (A/T) d. Repeat Steps 5b. and 5c. It may be necessary to repeat this procedure up to 8 times during the first drive cycle only. 6. Catalyst Monitor: a. To pre condition the vehicle for the catalyst monitor, drive at 60 mph as follows: Mirage 1.5L Only 3000GT Only All other models Accelerate to 60 mph for 30 seconds. Engine speed must be at least 2000 rpm and MAP sensor reading must be 323 mmhg or more (M/T); 341 mm Hg or more (A/T). Then drive at 60 mph for 60 seconds. During the 60 seconds, the engine speed must be at least 2000 rpm and MAP sensor reading must be 10.5 inhg or more (M/T); 10.8 inhg or more (A/T). Then go to Step 6b. Drive at 60 mph for 70 seconds. The volume air flow sensor reading must be more than 100 Hz during the 70 seconds. Then go to Step 6b. Drive at 60 mph for 10 seconds. The volume air flow sensor reading must be more than 200 Hz (more than 280 Hz for Truck). Then continue to drive at 60 mph for 50 seconds. The volume air flow sensor reading must be more than 100 Hz (more than 160 Hz for Truck). Then go to Step 6b.
Page 5 of 7 NOTE: If necessary, you can stop the vehicle after pre conditioning before continuing with Step b. below. But do not turn off the engine. b. Find a road where you can drive at a constant speed with no stops for two minutes. Reduce speed to meet the following conditions for two minutes. The following conditions must be met and held within the parameters below and verified on the scan tool data list during the two minutes: Idle switch: OFF shown on scan tool data list Engine speed must be at or below the speed listed: Model Galant, Eclipse, Expo, Mirage, Truck Mirage 1.5L 3000GT, Diamante, Montero, Montero Sport, Mirage 1.8L Engine Speed (rpm) 2600 or less 3000 or less (M/T) 2250 or less (A/T) 3000 or less Volume air flow sensor reading must be within the range listed: Model Volume Air Flow Sensor (Hz) Galant, Eclipse, Expo, Mirage 70 140 Truck 90 210 3000GT, Diamante, Montero, 70 170 Montero Sport MAP sensor reading for Mirage 1.5L M/T models must be 5.8 18.7 inhg MAP sensor reading for Mirage 1.5L A/T models must be 7 21.6 inhg If the volume air flow sensor reading or engine speed goes out of the specified range during this monitor, you must repeat this monitor from Step 6b. c. Release the accelerator pedal to reduce speed for 10 seconds. d. Repeat Steps 6b. and 6c. It may be necessary to repeat this procedure up to 6 times during the first drive cycle only. 7. Check the Readiness Test status on the scan tool. a. When all Readiness codes are complete ( CMP ), the OBD II system check is completed. b. If all the Readiness codes are incomplete ( INCMP ), turn the ignition key to OFF and wait for 10 seconds. Then go to Step 3 to carry out the entire OBD II drive cycle (all monitors) again. c. If one or more (not all) Readiness codes are complete ( CMP ), go to Step 2 to identify which monitor did not complete.
Page 6 of 7 WARRANTY INFORMATION Description Labor Operation No. Time Allowance OBD II Readiness Check 85100160 0.2 hrs. Oxygen Sensor Monitor 851001A1 0.2 hrs. EGR Monitor 851001A2 0.6 hrs. Catalyst Monitor 851001A3 0.6 hrs. Purge Flow Monitor 851001A4 0.1 hrs. EVAP Leak Monitor 851001A5 0.3 hrs. Nature Code: 16D Cause Code: 490 Warranty Coverage: 8 years / 80,000 miles Special Warranty Information: Normal warranty procedures apply. Mitsubishi Motors North America, Inc.
Page 7 of 7 Evaporative Emission Control Monitors Year Model Emissions Engine Monitor 1996 Mirage California 1.5L / 1.8L Purge Flow Mirage Federal 1.5L / 1.8L Purge Flow Expo California 2.4L Strict Evap Leak Expo 50 state 2.4L Purge Flow Diamante 50 state 3.0L Purge Flow 3000GT 50 state 3.0L Purge Flow 3000GT Spyder 50 state 3.0L Purge Flow Galant California 2.4L Strict Evap Leak Galant Federal 2.4L Purge Flow Truck 50 state 2.4L Purge Flow Montero California 3.0L Strict Evap Leak Montero 50 state 3.5L Purge Flow Montero Federal 3.0L Purge Flow Eclipse 50 state 2.0L Purge Flow Eclipse Spyder 50 state 2.0L / 2.4L Purge Flow 1997 Mirage California 1.5L / 1.8L Purge Flow Mirage Federal 1.5L / 1.8L Purge Flow 3000GT 50 state 3.0L Purge Flow 3000GT Spyder 50 state 3.0L Purge Flow Montero Sport California 2.4L Strict Evap Leak Montero Sport California 3.0L Strict Evap Leak Montero Sport Federal 2.4L Strict Evap Leak Montero Sport Federal 3.0L Strict Evap Leak Montero Federal 3.0L Purge Flow Montero California 3.5L Strict Evap Leak Montero 50 state 3.5L Purge Flow Eclipse 50 state 2.0L Purge Flow Eclipse Spyder 50 state 2.0L Purge Flow Eclipse Spyder 50 state 2.4L Strict Evap Leak Galant California 2.4L Strict Evap Leak Galant Federal 2.4L Purge Flow Diamante 50 state 3.5L Purge Flow 1998 All All All Strict Evap Leak