Diagnosis Introduction - Except Evolution: Diagnosis Mitsubishi Lancer IX

A/T DIAGNOSTIC TROUBLESHOOTING STRATEGY

Use these steps to plan your diagnostic strategy. If you follow them carefully, you will find most A/T malfunctions.

1. Gather as much information as possible about the complaint from the customer.
2. Verify that the condition described by the customer exists.
3. Check the vehicle for any A/T Diagnostic Trouble Codes (DTCs).
4. If you can not verify the condition and there are no DTCs, the malfunction is intermittent.
5. If you can verify the condition but there are no DTCs, or the system can not communicate with the scan tool, refer to the «SYMPTOM CHART»(ref-183627-S25931297352005081800000) .
6. If there is a DTC, record the number of the code, then erase the code from memory using the scan tool.
7. Reconfirm the symptom with a «ROAD TEST»(ref-183627-S11234312042005081800000) .
8. If a DTC is set again, go to «DIAGNOSTIC TROUBLE CODE PROCEDURES - EXCEPT EVOLUTION»(ref-183628) .
9. If a DTC is not set again, the malfunction is intermittent.
10. After repairs are completed, conduct a «ROAD TEST»(ref-183627-S11234312042005081800000) duplicating the complaint conditions to confirm the malfunction has been eliminated.

A/T KEY INTERLOCK AND SHIFT LOCK MECHANISMS DIAGNOSTIC TROUBLESHOOTING STRATEGY

Use these steps to plan your diagnostic strategy. If your follow then carefully, you will be sure that you have exhausted most of the possible ways to find automatic transaxle key interlock and shift lock mechanisms fault.

1. Gather information from the customer.
2. Verify that the condition described by the customer exists.
3. Find the malfunction by following the Symptom Chart.
4. Verify malfunction is eliminated.

ON-BOARD DIAGNOSTICS

The powertrain control module (PCM) monitors its input/output signals (some signals all the time and others under specified conditions). When an irregular signal is initially monitored, the PCM decides that a malfunction has occurred and records the occurrence as a diagnostic trouble code. There are 24 diagnostic items. The diagnostic results can be read with a scan tool. Diagnostic trouble codes are kept in memory by direct battery feed. The codes are retained in memory even if the ignition switch is in the "LOCK" (OFF) position. Diagnostic trouble codes will, however, be erased when a battery terminal or the PCM connector is disconnected. In addition, the diagnostic trouble code can also be erased by scan tool MUT-II (MB991502).

Note. If a sensor is disconnected when the ignition switch is in the "ON" position, a diagnostic trouble code is stored in memory. In this case, erase the DTC using the scan tool.

The 24 diagnostic items are displayed in numeric order.

HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES

Required Special Tool

1. MB991502: Scan Tool (MUT-II)

Note. If the battery voltage is low, diagnostic trouble codes will not be output. Check the battery if scan tool MB991502 does not display.

Note. If the battery is disconnected or if the powertrain control module connector is disconnected, the diagnostic trouble codes will be erased. Do not disconnect the battery or powertrain control module before the diagnostic trouble codes have been read.

Scheme 75

1. Connect scan tool MB991502 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Record the diagnostic trouble codes (DTCs) for A/T.
4. Refer to «DIAGNOSTIC TROUBLE CODE PROCEDURES - EXCEPT EVOLUTION»(ref-183628) .
5. Turn the ignition switch to "LOCK" (OFF) and then back to "ON" again.
6. Erase the diagnostic trouble code by selecting DTC erase from SPECIAL MENU screen, using scan tool MB991502.
7. Check for diagnostic trouble codes. Confirm that scan tool MB991502 displays "normal."
8. Turn the ignition switch to the "LOCK" (OFF) position.
9. Disconnect scan tool MB991502.

INSPECTION USING SCAN TOOL, ROAD TEST AND DATA LIST

Required Special Tool

MB991502: Scan Tool (MUT-II)

Scheme 76

1. Connect scan tool MB991502 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Carry out the inspection by means of the Road Test and the Data List function. If there is an abnormality, check and repair the chassis harnesses and components. Refer to «ROAD TEST»(ref-183627-S11234312042005081800000) . Refer to «DATA LIST REFERENCE TABLE»(ref-183627-S19705449652005081800000) .
4. Recheck using scan tool MB991502 and confirm that the abnormal input and output have returned to normal as a result of the repairs.
5. Check for and inspect any diagnostic trouble codes (DTCs) that may have surfaced from testing. Erase any diagnostic trouble codes after checking.
6. Turn the ignition switch to the "LOCK" (OFF) position.
7. Disconnect scan tool MB991502 from the data link connector.
8. Start the engine again and do a test drive to confirm that the problem is eliminated.

ROAD TEST

Check using the following procedures.

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