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.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSMITSUBISHI1991PRECIS L4-1468CC 1.5L SOHCREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSMAIN RELAY (COMPUTER/FUEL SYSTEM)TESTING AND INSPECTIONNON TROUBLE CODE COMPONENTS
1991 Mitsubishi Precis L4-1468cc 1.5L SOHC
Non Trouble Code Components
1991 Mitsubishi Precis L4-1468cc 1.5L SOHCSECTION Non Trouble Code Components
Control Relay Location:
Control Relay Operation:
To test the Control Relay, located in the passenger compartment (under dash, passenger side), Proceed as follows.
CAUTION: When applying battery voltage directly, make sure that it is applied to the correct terminal. Otherwise, the relay could be damaged.
NOTE: Failure of the control relay could interrupt power supply to the fuel pump, injectors and ECU, resulting in start failure.
Confirm circuit tester polarity before checking continuity.
COMPONENT TEST
1. In the following order check continuity between the specified terminals, as instructed.
To test coils L1 and L2:
Check terminals 1 and 4: should be non-conductive (infinite ohm).
Check terminals 3 and 8: should be conductive (Approx. 95 ohm).
Check terminals 2 and 8: should be conductive (Approx. 95 ohm).
Check terminals 6 and 7: should be conductive (Approx. 35 ohm).
Apply positive power to terminal 6 with negative power applied to terminal 7.
Check terminals 1 and 4: should be conductive (0 ohm).
Remove power.
To test coil L3:
Check terminals 1 and 2, should be non-conductive (infinite ohm).
Check terminals 7(+) and 5(-), should be non-conductive (infinite ohm).
Check terminals 5(-) and 7(+), should be conductive (0 ohm).
Apply positive power to terminal 5 with negative power applied to terminal 7.
Check terminals 1 and 2, should be conductive (0 ohm)
Remove power.
Test between each terminal and the case: All terminals should be non-conductive (infinite ohm).
2. If the results are not satisfactory, replace the control relay.
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.