Function Inspection Using M-MDS

DIAGNOSTIC PROCEDURE - FUNCTION INSPECTION USING M-MDS

Step	Inspection	Results	Action
1	PURPOSE: VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY Verify related Service Bulletins, on-line repair information, or Service Information availability. Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. If the vehicle is not repaired, go to the next step.
1		No	Go to the next step.
2	PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA Is the DTC P0300:00 on freeze frame data?	Yes	Go to the next step.
2		No	Go to the troubleshooting procedure for DTC on freeze frame data. (See DTC TABLE [PCM (VINs 7, L, M) (US)] .)
3	PURPOSE: RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION Record the freeze frame data/snapshot data and diagnostic monitoring test results (misfire related). NOTE: Recording can be facilitated using the screen capture function of the PC.	-	Go to the next step.
4	PURPOSE: INSPECT FOR OTHER RELATED DTCs Perform the DTC inspection for the PCM. (See DTC INSPECTION .) Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (VINs 7, L, M) (US)] .)
4		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 PID/DATA MONITOR INSPECTION .) APP1 APP2 ECT ECT_VOLT IAT MAF MAP MAP_VOLT ENG_RPM TP_RELAT VSS 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 Troubleshooting Diagnostic Procedure to perform the repair completion verification. If there is no malfunction: Go to the next step.
5		No	Go to the next step.
6	PURPOSE: RECORD NUMBER OF CURRENT MISFIRES DURING NO LOAD TO SPECIFY MISFIRING CYLINDER 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 (ATX)/neutral (MTX)), increase the engine speed to 3, 000 rpm and hold for 30 s. Verify the number of misfires. Access the following PIDs using the M-MDS (See PID/DATA MONITOR INSPECTION .) (See PID/DATA MONITOR TABLE [PCM (VINs 7, L, M) (US)] .) MISFIRE_CYL1_CAT MISFIRE_CYL2_CAT MISFIRE_CYL3_CAT MISFIRE_CYL4_CAT MISFIRE_CYL1_EMI MISFIRE_CYL2_EMI MISFIRE_CYL3_EMI MISFIRE_CYL4_EMI Can a misfire be verified?	Yes	Record each of the verified values, then go to the next step.
6		No	Go to Step 9.
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 M) (US)] .) (See SPARK PLUG REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .) 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 (ATX)/neutral (MTX)), increase the engine speed to 3, 000 rpm and hold for 30 s. Verify the number of misfires. Access the following PIDs using the M-MDS (See PID/DATA MONITOR INSPECTION .) (See PID/DATA MONITOR TABLE [PCM (VINs 7, L, M) (US)] .) MISFIRE_CYL1_CAT MISFIRE_CYL2_CAT MISFIRE_CYL3_CAT MISFIRE_CYL4_CAT MISFIRE_CYL1_EMI MISFIRE_CYL2_EMI MISFIRE_CYL3_EMI MISFIRE_CYL4_EMI Is there a change from the recorded number of misfires in Step 6?	Yes	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
7		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 M) (US)] .) (See IGNITION COIL/ION SENSOR REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .) 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 (ATX)/neutral (MTX)), increase the engine speed to 3, 000 rpm and hold for 30 s. Verify the number of misfires. Access the following PIDs using the M-MDS (See PID/DATA MONITOR INSPECTION .) (See PID/DATA MONITOR TABLE [PCM (VINs 7, L, M) (US)] .) MISFIRE_CYL1_CAT MISFIRE_CYL2_CAT MISFIRE_CYL3_CAT MISFIRE_CYL4_CAT MISFIRE_CYL1_EMI MISFIRE_CYL2_EMI MISFIRE_CYL3_EMI MISFIRE_CYL4_EMI Is there a change from the recorded number of misfires in Step 6?	Yes	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 2.
8		No	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 3.
9	PURPOSE: RECORD NUMBER OF CURRENT MISFIRES WHILE DRIVING UNDER LOAD TO SPECIFY MISFIRING CYLINDER Start the engine. NOTE: The fuel injection control enters the deceleration fuel cut zone when the accelerator pedal is fully released while the vehicle is being driven. At this time, the count for the number of misfires is stopped. Verify the number of misfires while the vehicle is being driven for 1 min under the condition of the freeze frame data recorded in Step 3. Access the following PIDs using the M-MDS (See PID/DATA MONITOR INSPECTION .) (See PID/DATA MONITOR TABLE [PCM (VINs 7, L, M) (US)] .) MISFIRE_CYL1_CAT MISFIRE_CYL2_CAT MISFIRE_CYL3_CAT MISFIRE_CYL4_CAT MISFIRE_CYL1_EMI MISFIRE_CYL2_EMI MISFIRE_CYL3_EMI MISFIRE_CYL4_EMI Can a misfire be verified?	Yes	Record each of the verified values, then go to the next step.
9		No	Referring to the service questioning results, verify the misfire rate again with the driving mode data added before recording the freeze frame data/snapshot data.
10	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 M) (US)] .) (See SPARK PLUG REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .) Start the engine. NOTE: The fuel injection control enters the deceleration fuel cut zone when the accelerator pedal is fully released while the vehicle is being driven. At this time, the count for the number of misfires is stopped. Verify the number of misfires while the vehicle is being driven for 1 min under the driving conditions in which misfires were verified in Step 9. Access the following PIDs using the M-MDS (See PID/DATA MONITOR INSPECTION .) (See PID/DATA MONITOR TABLE [PCM (VINs 7, L, M) (US)] .) MISFIRE_CYL1_CAT MISFIRE_CYL2_CAT MISFIRE_CYL3_CAT MISFIRE_CYL4_CAT MISFIRE_CYL1_EMI MISFIRE_CYL2_EMI MISFIRE_CYL3_EMI MISFIRE_CYL4_EMI Is there a change from the recorded number of misfires in Step 9?	Yes	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
10		No	Go to the next step.
11	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 M) (US)] .) (See IGNITION COIL/ION SENSOR REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .) Start the engine. NOTE: The fuel injection control enters the deceleration fuel cut zone when the accelerator pedal is fully released while the vehicle is being driven. At this time, the count for the number of misfires is stopped. Verify the number of misfires while the vehicle is being driven for 1 min under the driving conditions in which misfires were verified in Step 9. Access the following PIDs using the M-MDS (See PID/DATA MONITOR INSPECTION .) (See PID/DATA MONITOR TABLE [PCM (VINs 7, L, M) (US)] .) MISFIRE_CYL1_CAT MISFIRE_CYL2_CAT MISFIRE_CYL3_CAT MISFIRE_CYL4_CAT MISFIRE_CYL1_EMI MISFIRE_CYL2_EMI MISFIRE_CYL3_EMI MISFIRE_CYL4_EMI Is there a change from the recorded number of misfires in Step 9?	Yes	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 2.
11		No	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 3.