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HOMESERVICE MANUALSPLYMOUTH1989COLT DL, 1.5 X, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMBASIC TESTINGFUEL PRESSUREFUEL INJECTED ENGINESCONTROL RELAY
1989 Plymouth Colt DL, 1.5 X, Standard

Control Relay

1989 Plymouth Colt DL, 1.5 X, StandardSECTION Control Relay

This multi-purpose relay switches power to vehicle sensors and actuators including airflow sensor, crank angle sensor, idle speed control, injectors and fuel pump, (not all sensors are used on all engines). When ignition switch is turned "ON" position, ECU energizes coils controlling injectors, airflow sensor and idle speed control. When ignition switch is turned to "START" position, ECU energizes coils (through inhibitor switch on automatic transmission) to supply power to fuel pump. Relay failure will cause a no-start condition. For additional testing see SYSTEM & COMPONENT TESTING article.

Fig 1: Typical Fuel Injected Engine Fuel Pressure Testing Connection
G120113Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
FUEL PUMP TEST TERMINAL LOCATION

Application Wire Color Location
Colt Black/White Center of firewall.
Colt Vista (1) Right of center on firewall.
Colt Wagon Red Left rear eng. compt.
Conquest Black/White Right front of eng. compt.
Raider Black/White Behind right kick panel.
(1) Information not available.
FUEL PRESSURE SPECIFICATIONS

Application psi (kg/cm2 )
Regulator Hose On
All Engines 38 (2.7)
Conquest 35-38 (2.5-2.7)
Regulator Hose Off
All Other Models 47-50 (3.3-3.5)
Raider (3.0L) 47-53 (3.3-3.5)
RENDER: 1.0x

NO RELATED

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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.