Ignition And Engine Control Systems - Symptom Related Diagnostic Procedures (Convertible)

• Breakout Box And Parameter Tables (B5234T3; B5254T; 1998)
  • Connecting breakout box
    • Connecting breakout box to connector A (black)
    • Checking ground terminals
    • Checking for open-circuit
    • Verification
    • Information
      • Fault-tracing information
    • Connecting breakout box to connector B (gray)
    • Checking ground terminal #B28
• Checking Air Conditioning (A/C) Relay Signal And Air Conditioning (A/C) Compressor Signal (B5234T3; B5254T; 1998)
  • Checking air conditioning (A/C) relay signal and air conditioning (A/C) compressor signal
  • Fault-tracing information
    • Checking air conditioning (A/C) relay signal and air conditioning (A/C) compressor signal
• Checking Camshaft Adjustment (B5234T3; B5254T; 1998)
  • Checking camshaft adjustment
    • Notes
    • Fault-tracing information
    • Information
      • Fault-tracing information
    • Connector B
      • Notes
      • Connecting up Test box to Motronic 4.3
      • Connection of break-out box to connector B (grey)
      • Checking ground terminal #B28
      • Checking for open-circuit, contact resistance and oxidation
      • Verification
  • Fault-tracing information
• Checking Camshaft Position (CMP) Sensor Signal (B5234T3; B5254T; 1998)
  • Checking camshaft position (CMP) sensor signal
  • Fault-tracing information
• Checking Compression (B5234T3; B5254T; 1998)
  • Fault-tracing information
  • Checking compression
    • Notes
    • Engine repairs
    • Verification
    • Information
      • Fault-tracing information
  • Checking EGR valve for leakage
    • Fault tracing information
    • Checking EGR valve for leakage at idling
    • Leakage
      • Checking engine idling
      • Checking signal lead
      • Checking for short-circuit
      • Checking EGR controller
      • Replacement of component
      • Checking yellow hose
      • Checking for blockage and leakage
      • Checking engine coolant temperature
      • Checking control module signal grounds
      • Cleaning terminal
      • Checking connectors
    • Verify
      • Verification
    • Information
      • Fault-tracing information
• Checking Engine Coolant Temperature (ECT) Sensor Signal (B5234T3; B5254T; 1998)
  • Checking engine coolant temperature (ECT) sensor signal
  • Fault-tracing information
• Checking Engine Speed (Rpm) Sensor Signal (B5234T3; B5254T; 1998)
  • Checking engine speed (RPM) sensor signal
  • Fault-tracing information
• Checking For Air Leakage (B5234T3; B5254T; 1998)
  • Checking for air leakage
  • Fault-tracing information
• Checking High Tension Side And Injector (B5234T3; B5254T; 1998)
  • Checking high tension section and injector
  • Fault-tracing information
• Checking High Tension Voltage (B5234T3; B5254T; 1998)
  • Checking high tension voltage
  • Fault-tracing information
• Checking Idle Air Control (IAC) Valve (B5234T3; B5254T; 1998)
  • Checking idle air control (IAC) valve
  • Fault-tracing information
• Checking Ignition Cables, Distributor Cap And Rotor (B5234T3; B5254T; 1998)
  • Checking ignition cables, distributor cap and rotor
  • Fault-tracing information
• Checking Ignition Retardation Due To Knocking (B5234T3; B5254T; 1998)
  • Checking ignition retardation due to knocking
  • Fault-tracing information
• Checking Initial Setting Of Boost Pressure Control (BPC) Valve Pressure Servo (B5234T3; B5254T; 1998)
  • Checking initial setting of boost pressure control (BPC) valve pressure servo
  • Fault-tracing information
• Checking Mass Air Flow (MAF) Sensor (B5234T3; B5254T; 1998)
  • Checking mass air flow (MAF) sensor
  • Fault-tracing information
• Checking Signal From Mass Air Flow (MAF) Sensor (B5234T3; B5254T; 1998)
  • Checking signal from mass air flow (MAF) sensor
    • Notes
    • Signal too low. Permanent fault
      • Notes
      • Checking fresh air intake
      • Corrective action
      • Checking power cable
      • Checking for open-circuit
      • Checking signal cable
      • Checking for short-circuit
      • Checking mass air flow (MAF) sensor signal
      • Checking for contact resistance and oxidation
      • Replacing mass air flow (MAF) sensor
    • Verification
    • Information
      • Fault-tracing information
    • Signal too high. Permanent fault
      • Notes
      • Checking power ground
      • Checking control module connector
      • Checking for open-circuit
      • Checking signal ground
      • Checking signal cable
      • Checking for short-circuit
      • Checking mass air flow (MAF) sensor signal
      • Checking for contact resistance and oxidation
      • Replacing mass air flow (MAF) sensor
      • Checking mass air flow (MAF) sensor
      • Fault-tracing information
  • Fault-tracing information
• Checking Signal From Transmission Control Module (TCM) (B5234T3; B5254T; 1998)
  • Checking signal from transmission control module (TCM)
  • Fault-tracing information
    • Engine speed dips when a gear is selected (automatic transmission)
• Checking Spark Plugs (B5234T3; B5254T; 1998)
  • Checking spark plugs
  • Fault-tracing information
• Checking Air Conditioning (A/C) System (B5234T3; B5254T; 1998)
  • Checking air conditioning (A/C) system
  • Fault-tracing information
• Checking Throttle Body (Tb) (B5234T3; B5254T; 1998)
  • Checking throttle body (TB)
  • Fault-tracing information
• Cleaning And Greasing Engine Control Module (ECM) Connector (B5234T3; B5254T; 1998)
  • Cleaning and greasing engine control module (ECM) connector
  • Fault-tracing information
• Cleaning And Greasing Mass Air Flow (MAF) Sensor (B5234T3; B5254T; 1998)
  • Cleaning and greasing mass air flow (MAF) sensor
  • Fault-tracing information
• Cleaning And Greasing Camshaft Position (CMP) Sensor Connector (B5234T3; B5254T; 1998)
  • Cleaning and greasing camshaft position (CMP) sensor connector
  • Fault-tracing information
• Cleaning And Greasing Engine Speed (Rpm) Sensor Connector (B5234T3; B5254T; 1998)
  • Cleaning and greasing engine speed (RPM) sensor connector
  • Fault-tracing information