Without Scan Tool
HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODESRequired Special Tool: MB991529: Diagnostic Trouble Code Check Harness
1. Use special tool MB991529 to ground terminal number 1 of the data link connector.
2. Turn on the ignition switch to "ON" position.
3. Read the diagnostic trouble codes by counting "N" range light flashes.
4. Refer to the Diagnostic Trouble Codes Chart.
5. Erase the diagnostic trouble codes by the following procedure.
1. Turn the ignition switch to "LOCK" (OFF) position.
2. Disconnect the negative battery cable for 10 seconds or more. Reconnect the cable.
3. Turn the ignition switch to "ON" position. Read the diagnostic trouble code output and check that no diagnostic trouble code is output.
4. Start the engine and let it run until the engine has warmed up. Run it at idle for approximately 10 minutes or longer. The engine control module must build up the adaptive memory for smooth idle and good performance.
UNDERSTANDING THE "N" RANGE LIGHT FLASHES
NOTE: Other diagnostic trouble codes also are output by the flashing of the "N" range light corresponding to the same code numbers as the scan tool displays.
INSPECTION USING SCAN TOOL MB991502, ROAD TEST AND DATA LIST
Required Special Tool: MB991502: Scan Tool (MUT-II)
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
1. Connect the scan tool to data link connector.
2. Turn the ignition switch to "ON" position.
3. Carry out inspection by means of the Road Test or Data List function.
If there is an abnormality, check and repair the chassis harnesses and components.
Refer to R23A-18, Road Test.
Refer to R23A-140, Data List Reference Table.
4. Re-check using scan tool and check that the abnormal input and output have returned to normal because of the repairs.
5. Erase the diagnostic trouble code(s).
6. Turn the ignition switch to "LOCK" (OFF) position.
7. Disconnect the scan tool from the data link connector.
8. Start the engine again and do a test drive to confirm that the problem is eliminated.