Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1992TEMPO LX, 2.3 X, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/CODES - EEC-IV
1992 Ford Tempo LX, 2.3 X, Standard
Engine Controls - Tests W/Codes - EEC-IV
1992 Ford Tempo LX, 2.3 X, StandardSECTION Engine Controls - Tests W/Codes - EEC-IV
- Introduction
- Self-Diagnostic System
- Quick Test
- Additional System Functions
- EEC-IV Diagnosis By Symptom
- DTC Reference Charts
- Circuit Tests
- Notes
- How To Use Circuit Tests
- Circuit Test Aa - No Start (TFI Ignition Systems)
- Circuit Test Ab - No Start (Dis Ignition Systems)
- Circuit Test Ac - No Start (EDIS Ignition Systems)
- Circuit Test B - Checking Vehicle Battery
- Circuit Test C - Reference Voltage
- Circuit Test DA - Temperature Sensor Test (Act & ECT)
- Circuit Test Db - EGR Temperature (EGRT) Sensor
- Circuit Test Dc - Mass Airflow (MAF) Sensor
- Circuit Test DF - Map/Barometric Pressure (BP) Sensor
- Circuit Test Dg - Knock Sensor (KS)
- Circuit Test DH - Throttle Position Sensor (TPS)
- Circuit Test DL - Pressure Feedback EGR (PFE) Valve, Delta PFE (DPFE) Sensor & EGR Vacuum Regulator (EVR) Solenoid
- Circuit Test DN - EGR Valve Position (EVP) Sensor & EGR Valve Regulator (EVR) Solenoid
- Circuit Test DP - Vehicle Speed Sensor (VSS)
- Circuit Test Dr - Cylinder Identification (CID) Sensor
- Circuit Test DS - Programmable Speedo/Odometer Module (PSOM)
- Circuit Test FD - Brake On-Off (Boo) Switch
- Circuit Test FE - Electrical Load Inputs
- Circuit Test Ff - Power Steering Pressure Switch (PSPS)
- Circuit Test G - MAF/TPS Fuel Injector Pulse Width Test
- Circuit Test H - Fuel Control
- Circuit Test Ha - Adaptive Fuel
- Circuit Test J - Fuel Pump Circuit (Relay & Inertia Switch)
- Circuit Test KA - EGR Vacuum Regulator (EVR) Solenoid
- Circuit Test Kc - Air Management System (Am1/Am2)
- Circuit Test KD - Canister Purge (CANP)
- Circuit Test KE - Idle Speed Control (Air By-Pass)
- Circuit Test KF - Electro Drive Fan (EDF)/High Electro Drive Fan (HEDF)
- Circuit Test Kl - Shift Indicator Light (SIL)
- Circuit Test Km - Wide Open Throttle A/C Cut-Out (WAC) & A/C Demand Switch
- Circuit Test Kn - Fuel Pressure Regulator Control (FPRC) Solenoid
- Circuit Test KP - Octane Adjust
- Circuit Test Kt - Intake Air Control Valve (IAC) System
- Circuit Test M - Dynamic Response Test
- Circuit Test Ml - Self-Test Output (STO) Or Malfunction Indicator Light (Mil)
- Circuit Test NA - TFI Ignition Diagnostic Monitor (IDM)
- Circuit Test NB - Dis Ignition Diagnostic Monitor (IDM)
- Circuit Test NC - EDIS Ignition Diagnostic Monitor (IDM)
- Circuit Test Pa - Spark Timing Check (TFI Vehicles)
- Circuit Test PB - Spark Timing Check (Dis Vehicles)
- Circuit Test Pc - Spark Timing Check (EDIS Vehicles)
- Circuit Test QA - No Codes/Codes Not Listed
- Circuit Test QB - Continuous Memory Code 15 Or 512
- Circuit Test QC - Output State Check Not Functioning
- Circuit Test S - System Check
- Circuit Test Ta - Neutral Drive Input
- Circuit Test Tb - Low & Overdrive Cancel Switch (OCS)
- Circuit Test TC - Transmission Solenoids
- Circuit Test TD - Manual Lever Position (MLP) Sensor
- Circuit Test Te - Transmission Oil Temperature (Tot) Sensor
- Circuit Test TF - Transmission Speed Sensors
- Circuit Test TG - Electronic Transmission Continuous Memory Service Codes
- Circuit Test X - Integral Relay Control Module (IRCM)
- Summary
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.