Engine Controls - System/Component Tests

• Introduction
• Engine Sensors & Switches
  • Airflow Sensor Position Indicator Test
  • Coolant Temperature Sensor Test (A) Test
  • Coolant Temperature Sensor Test (B) Test
  • EGR Temperature Sensor Test
  • Full Load Contact Test
  • Hall Effect Speed Sensor (190E 2.6L) Test
  • Oxygen (O2) Sensor Test
  • TD Signal Test
  • Throttle Valve Switch Test
• Relays & Solenoids
  • Control Unit Relay Test
  • Fuel Cut-Off (DECEL) Solenoid
  • Fuel Pump Relay (420 & 560 Series)
  • OVERVOLTAGE Protection Relay
• Fuel System
  • Fuel Delivery
  • After-Start Enrichment Test
  • Altitude Correction Capsule Test
  • Cold Start Valve (190E 2.6L & 300 Series) Test
  • Cold Start Valve (420 & 560 Series) Test
  • Fuel Cut-Off DECEL Solenoid (190E 2.6L & 300 Series) Test
  • Fuel Cut-Off DECEL Solenoid (420 & 560 Series) Test
  • Full-Load Enrichment Test
  • Lower Chamber (Differential) Pressure Test
  • Lambda Control (CALIFORNIA Models) Test
  • Lambda Control (Federal Models) Test
• Idle Control System
  • Idle & Full Load Contact Test
  • Electronic Idle Speed Control (190E 2.6L & 300 Series) Test
  • Electronic Idle Speed Control (420SEL & 560 Series) Test
  • Hall Effect Speed Sensor Test
• Idle Speed Stabilization (A/C Compressor Engaged) Test
  • Notes
  • Idle Speed Stabilization (A/T Engaged) Test
• Ignition System (EZL Ignition)
  • Engine Not Running
  • Engine Running
• Emission Systems & Sub-Systems
  • Air Injection Test
  • EGR 420 & 560 Series System Testing
  • EGR Temperature Sensor (CALIFORNIA Vehicles Only)
• Fuel Evaporation
  • EVAP Canister Purge Test