LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Porsche >> 1984 >> 944 Standard >> Repair and Diagnosis >> Engine Performance >> System >> DME System >> Diagnosis & Testing >> Electrical Connections
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Electrical Connections

  1. Ensure all electrical connections are free of corrosion and securely attached. Check DME ground wire on cylinder No. 1 intake pipe (911 Carrera) or engine flange and on clutch housing near speed and reference mark sensors (944). Ensure connections have good contact and are tight.
  2. On 911 Carrera, particularly check 4-pin connector on air flow sensor, 3-pin plug on the throttle switch, 2-pin plug for idle switch contact, 35 pin plug on DME CU, 3-pin plug for air regulating valve, 14-pin plug for fuel injector, large pin connector for oxygen sensor (Calif. models, check 2-pin connector for oxygen sensor heating element), 2-pin connector for temperature sensor II and two 3-pin connectors for flywheel sensors.
  3. On 944 particularly check 9-pin connector above brake booster, 4-pin connector on air flow sensor, 3-pin connector on throttle switch, 35-pin connector on CU, 2-pin connector at temperature sensor II, 1-pin connector for oxygen sensor (Calif. models, check 2-pin connector for oxygen sensor heating element), and two 3-pin connectors for flywheel sensors (attached to No. 4 cylinder intake manifold).
NOTE: CU connector is held in place by a catch. Push catch to the right and pull off plug with a downward motion.
scientia non olet · About LEMON Manuals