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Home >> Volvo >> 1995 >> 940 Base, 4D Sedan, AW71L >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Turbo >> Self-Diagnostics - Fuel Injection >> Control Function No. 1 >> Retrieving Codes
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Retrieving Codes

  1. Locate diagnostic unit behind left strut tower, and remove its cover. Connect selector cable to socket No. 2. Turn ignition switch to ON position. Enter control function No. 1 (retrieving codes) by pressing push button one time 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 Fig 1 . Note all codes. Only 3 separate codes can be stored at once. If no codes are stored, LED will flash 1-1-1, indicating fuel system is operating properly.
    Fig 1: Counting Red LED Code Flashes For Code 2-1-3
    G91E16646Courtesy of VOLVO CARS OF NORTH AMERICA.
  3. If a fault code is received, see FUEL INJECTION FAULT CODES  table. 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 codes must be repaired before further codes can be retrieved.
NOTE: Not all codes listed in FUEL INJECTION FAULT CODES table are used on every vehicle.
FUEL INJECTION FAULT CODES

Code Fault Repair
1-1-1 No Faults N/A
1-1-2 ECU Replace ECU
1-1-3 Fuel Injectors Check Fuel Injectors, Check Fuel Pressure
1-2-1 Mass Airflow Signal (1) Check Airflow Meter, (1) Main Relay
1-2-3 Cool. Temp. Sensor Signal (1) Check Sensor
1-3-1  Ignition System RPM Signal (2)
1-3-2 Battery Voltage Check Battery, Check Charging System
1-3-3 Throttle Switch (Idle) (1) Check Throttle Switch
2-1-2 O2 Sensor Signal Check Oxygen Sensor
2-1-3 Throttle Switch (Full Load) (1) Check Throttle Switch
2-2-1 Lambda Operation Check Intake Manifold, Check Fuel Pressure
2-2-3  Idle Valve Signal (2)
2-3-1 Lambda Adjustment Check Intake Manifold, Check Fuel Pressure
2-3-2 Lambda Adjustment Check Intake Manifold, Check Fuel Pressure
3-1-1  Speedometer Signal (2)
3-1-2  Knock/Fuel Enrichment (2) Signal Missing
3-2-2 Airflow Meter Hot Wire (1) Check Airflow Meter
(1) See the SYSTEM/COMPONENT TESTS article.
(2) See FAULT CODE TESTING - FUEL INJECTION.
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