| 1 |
PURPOSE: VERIFY RELATED REPAIR INFORMATION AVAILABILITY
- Verify related Service Bulletins and/or on-line repair information availability.
- Is any related repair information available?
|
Yes |
Perform repair or diagnosis according to the available repair information.
- If the vehicle is not repaired, go to the next step.
|
| No |
Go to the next step. |
| 2 |
PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
- Is the DTC P0301:00, P0302:00, P0303:00 or P0304:00 on FREEZE FRAME DATA?
|
Yes |
Go to the next step. |
| No |
Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA.
(See DTC TABLE
.) |
| 3 |
PURPOSE: RECORD FREEZE FRAME DATA/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS TO UTILIZE WITH REPEATABILITY VERIFICATION
NOTE:
- Recording can be facilitated using the screen capture function of the PC.
- Record the FREEZE FRAME DATA/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (misfire related) on the repair order.
|
- |
Go to the next step. |
| 4 |
PURPOSE: VERIFY RELATED PENDING CODE AND/OR DTC
- Switch the ignition off, then ON (engine off).
- Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST
.)
- Are any other PENDING CODEs and/or DTCs present?
|
Yes |
Go to the applicable PENDING CODE or DTC inspection.
(See DTC TABLE
.) |
| No |
Go to the next step. |
| 5 |
PURPOSE: VERIFY IF THERE IS PID ITEM CAUSING DRASTIC CHANGES OF ACCELERATION FLUCTUATION BY INPUT SIGNAL TO PCM
- Start the engine.
- Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST
.)
- APP1
- APP2
- ECT
- IAT
- MAF
- MAP
- MAP_V
- RPM
- TP_REL
- Is there a PID item affected by acceleration fluctuation?
|
Yes |
Inspect the suspected sensor and related wiring harness.
- If there is any malfunction:
- Repair or replace the malfunctioning part.
- Go to the Troubleshooting Diagnostic Procedure to perform the procedure from Step 11.
- If there is no malfunction:
|
| No |
Go to the next step. |
| 6 |
PURPOSE: RECORD NUMBER OF CURRENT MISFIRES FOR USE WITH MISFIRE INSPECTION
- Display the misfire rate and record the number of misfires.
- MF_CAT1
- MF_CAT_2
- MF_CAT_3
- MF_CAT_4
- MF_EMI1
- MF_EMI_2
- MF_EMI_3
|
- |
Go to the next step. |
| 7 |
PURPOSE: VERIFY IF MISFIRE CAUSE IS BAD SPARK PLUGS
- Switch the spark plugs on a cylinder that is misfiring and a cylinder that is not misfiring. (See SPARK PLUG REMOVAL/INSTALLATION [VIN Y]
.)
- Start the engine.
- Verify all accessory loads (A/C, headlights, blower fan, rear window defogger) are off.
- Under no-load conditions (P or N position), increase the engine speed to 3, 000 rpm.
- Display the misfire rate and record the number of misfires.
- MF_CAT1
- MF_CAT_2
- MF_CAT_3
- MF_CAT_4
- MF_EMI1
- MF_EMI_2
- MF_EMI_3
- Is there a change from the recorded number of misfires?
|
Yes |
Go to the Troubleshooting Diagnostic Procedure to perform the procedure from Step 1. |
| No |
Go to the next step. |
| 8 |
PURPOSE: VERIFY IF MISFIRE CAUSE IS BAD IGNITION COIL
- Switch the ignition coils on a cylinder that is misfiring and a cylinder that is not misfiring. (See IGNITION COIL/ION SENSOR REMOVAL/INSTALLATION [VIN Y]
.)
- Start the engine.
- Verify all accessory loads (A/C, headlights, blower fan, rear window defogger) are off.
- Under no-load conditions (P or N position), increase the engine speed to 3, 000 rpm.
- Display the misfire rate and record the number of misfires.
- MF_CAT1
- MF_CAT_2
- MF_CAT_3
- MF_CAT_4
- MF_EMI1
- MF_EMI_2
- MF_EMI_3
- Is there a change from the recorded number of misfires?
|
Yes |
Go to the Troubleshooting Diagnostic Procedure to perform the procedure from Step 2. |
| No |
Go to the Troubleshooting Diagnostic Procedure to perform the procedure from Step 3. |