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Home >> Volvo >> 1991 >> 240 SE, AW70L >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Self-Diagnostics - Ignition System >> Control Function No. 1 >> Retrieving Codes
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Retrieving Codes

  1. Locate the diagnostic unit and remove its cover. Connect selector cable to socket No. 6. Turn ignition to ON position. Enter control function No. 1 (retrieve codes) by pressing push button one time for at least one second and no more than 3 seconds.
    NOTE: Information on control functions No. 2 and 3 appears later in article. To enter control function No. 2, press push button twice for at least one second and no more than 3 seconds. To enter control function No. 3, press push button 3 times for at least one second and no more than 3 seconds.
  2. Watch red LED and count number of flashes in 3-flash series. Flash series are separated by 3-second intervals. See Figure. Note all codes. Only 3 separate codes can be stored at once. If no codes are stored, LED will flash a 1-1-1 to indicate ignition system is operating properly.
  3. If a fault code is received, refer to the IGNITION SYSTEM FAULT CODES  table in this article. Depress push button again and check for additional codes. Depress push button a third time, if necessary. If first code repeats, no other codes are present.
  4. Diagnostic system memory is full when 3 codes are present. Those 3 codes must be repaired before further codes can be retrieved.
IGNITION SYSTEM FAULT CODES

Code Fault Repair
1-1-1 No Faults N/A
1-4-2 ECU Replace ECU
1-4-3  Knock Sensor Signal (1)
1-4-4  Fuel System Load Signal (1)
2-1-4  Impulse Sensor Signal (1)
2-2-4  Coolant Temperature Sensor (1)
2-3-4  Throttle Switch Signal (1)
2-4-1  EGR System (1)
4-1-3  EGR Temperature Sensor (1)
(1) See FAULT CODE TESTING under SELF-DIAGNOSTICS - IGNITION SYSTEM .
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