OBD DRIVE MODE [L3]

BME010200102221

• Performing the Drive Mode inspects the OBD system for proper operation. The Drive Mode must be performed to ensure that no additional DTCs are present.

• During Drive Mode, the following systems are inspected:

- Oxygen sensor (HO2S)

- Oxygen sensor heater

- Catalytic converter (TWC)

Caution

• While performing the Drive Mode, always operate the vehicle in a safe and lawful manner.

• When the WDS or equivalent is used to observe monitor system condition while driving, be sure to have another technician with you, or record the data in the WDS or equivalent using the PID/DATA MONITOR AND RECORD function and inspect later.

Note

• Vehicle speed and engine speed detected by the PCM may differ from that indicated by the speedometer and tachometer. Use the WDS or equivalent to monitor vehicle speed.

• If the OBD system inspection is not completed during the Drive Mode, the following causes are considered:

1. The OBD system detects a malfunction.

2. The Drive Mode procedure is not completed correctly.

• Disconnecting the battery will reset the memory. Do not disconnect the battery during and after Drive Mode.

• The WDS or equivalent can be used at anytime through the course of Drive Mode to monitor the completion condition. Monitoring can be done by viewing the ON-BOARD SYSTEM READINESS menu.

PCM Adaptive Memory Procedure Drive Mode

Note

• The PCM adaptive memory condition can be confirmed with RFCFLAG PID.

• If RFCFLAG PID is ON, PCM adaptive memory procedure drive mode is not necessary, because the PCM already has adaptive memory.

• If RFCFLAG PID is OFF, PCM adaptive memory procedure drive mode should be performed before any other drive mode.

1. Start the engine and warm it up completely.

2. Verify the following conditions and correct if necessary.

• All accessory loads (A/C, headlights, blower fan, rear window defroster) are off.

• Initial ignition timing and idle speed are within specification.

• TEN and GND of DLC are not connected.

3. Perform no load racing at the engine speed at the 2,800-3,200 rpm for more than 30 s, then idle the engine for more than 30 s after the cooling fan is stopped. If possible, monitor RPM PID for engine speed and FAN DUTY PID for cooling fan condition during this procedure.

4. Turn the ignition switch off then to the ON position again.

5. Access to RFCFLAG PID to confirm PCM adaptive memory condition.

• If RFCFLAG PID is ON, PCM adaptive memory procedure drive mode is completed.

• If RFCFLAG PID is still OFF, go back to Step 1.

HO2S Heater, HO2S, and TWC Repair Verification Drive Mode

1. Access to RFCFLAG PID to confirm PCM adaptive memory condition.

• If RFCFLAG PID is OFF, perform PCM adaptive memory procedure drive mode first.

• If RFCFLAG PID is ON, start the engine and warm up completely.

2. Verify that all accessory loads (A/C, headlights, blower fan, rear window defroster) are off.

3. Drive the vehicle as shown in the graph; first drive in zone O, then A or B, followed by C or D, finally E or F. Driving condition before the constant speed driving is not specified.


Zone	Shift Position	Vehicle Speed km/h {mph}	Time Sec.
O	Neutral	0{0}	T1: Above 455
A	2nd	40-50 {25-32}	T2: Above 30
B	3rd	65-75 {41-47}	T2: Above 30
C	2nd	60-75{38-46}	T3: Above 20
D	3rd	75-100{47-62}	T3: Above 20
E	4th	50-75{31-46}	T4: Above 120
F	5th	75-100{47-62}	T4: Above 120

4. Stop vehicle and access ON-BOARD SYSTEM READINESS menu to inspect the Drive Mode completion condition.

• If completed, RFC changes from NO to YES.

• If not completed, turn the ignition switch off then go back to Step 3.

5. Access DIAGNOSTIC MONITORING TEST RESULTS menu to inspect the monitor results.

• If MEAS are not within specification, repair is not completed.

6. Verify that no DTCs are available.