Reading Diagnostic Trouble Codes
HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODESRequired 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.
NOTE: If the battery positive voltage is low, diagnostic trouble codes will not be set. Check the battery if the scan tool cannot 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.
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 for A/T.
4. Refer to the Diagnostic Trouble Code Chart.
5. Turn the ignition switch to the "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.
7. Check for diagnostic trouble codes. Confirm the scan tool displays "normal."
8. Turn the ignition switch to the "LOCK" (OFF) position.
9. Disconnect the scan tool.
INSPECTION USING SCAN TOOL, ROAD TEST AND DATA LIST
Required Special Tool: MB991502: Scan Tool (MUT-II)
CAUTION: To prevent damage to scan tool MB991502, alleys turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
1. Connect scan tool MB991502 to data link connector.
2. Turn the ignition switch to the "ON" position.
3. Carry out inspection by means of the Road Test and Data List function. If there is an abnormality, check and repair the chassis harnesses and components.
4. Re-check using scan tool and confirm that the abnormal input and output have returned to normal because of the repairs.
5. Check for and inspect any diagnostic trouble code(s) that may have surfaced from testing. Erase the diagnostic trouble code(s) when finished checking.
6. Turn the ignition switch to the "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.