Engine Controls - System/Component Tests

• Introduction
• Engine Sensors & Switches
  • Airflow Sensor Position Indicator
  • Coolant Temperature Sensor
  • Coolant Temperature Sensor Circuit Test
  • EGR Temperature Sensor
  • Hall Effect Speed Sensor (190E 2.6L)
  • Oxygen (O2) Sensor
  • TD/Tn Signal (Mas Unit Equipped)
  • Throttle Valve Switch
• Fuel Pump Relay (420SEL & 560 Series)
• OVERVOLTAGE Protection Relay
• Fuel Delivery System
• Fuel Control System
  • After-Start Enrichment
  • Altitude Correction Capsule (420SEL & 560 Series)
  • Fuel Cut-Off DECEL Solenoid (190E 2.6L & 300 Series)
  • Fuel Cut-Off DECEL Solenoid (420SEL & 560 Series)
  • Full-Load Enrichment
  • Lambda Control (CALIFORNIA)
  • Lambda Control (Federal)
  • Start Valve (190E 2.6L & 300 Series - Method A)
  • Start Valve (190E 2.6L & 300 Series - Method B)
  • Start Valve (420SEL & 560 Series)
• Idle Control System
  • Electronic Idle Speed Control (190E 2.6L & 300 Series)
  • Electronic Idle Speed Control (420SEL & 560 Series)
  • Idle Speed Stabilization (A/C Compressor Engaged - 190E 2.6L & 300 Series)
  • Idle Speed Stabilization (Auto. Trans. Engaged)
• EZL Ignition System
  • Notes
  • Engine Not Running
  • Engine Running
• Emission Systems & Sub-Systems
  • Air Injection
  • Exhaust Gas RECIRCULATION (EGR) (420SEL & 560 Series)
  • EGR Temperature Sensor (CALIFORNIA)
  • Fuel Evaporation