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Electrical Connections

  1. On 911 Carrera models, ensure all electrical connections are free of corrosion and securely attached. Check DME ground wires on cylinder No. 1 intake pipe and fuel filter mount. Check ground strap between body and transmission/engine.
  2. Check electrical plug connections in engine compartment on left side No. 14 pin plug on control plate, No. 6 pin plug for DME on left front cross member (below heater blower).
  3. Check plug connections at engine temperature sensor II, speed sensor, reference mark sensor, No. 3 pin on air regulating valve, No. 2 pin plug on idle microswitch, No. 3 pin on throttle switch, No. 5 pin plug on airflow sensor, No. 2 pin plugs on all fuel injectors, No. 35 pin for DME control unit (underneath front seat), No. 6 pin plug of DME relay and No. 2 pin plug of high altitude switch.
  4. On 924S and 944 models, check 9-pin connector above brake booster, 4-pin connector on airflow 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.
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