Colt Vista 2WD L4-2350cc 2.4L SOHC (1993)
Engine Control Module: Component Tests and General Diagnostics
Checking The PCM Power And Grounds
CONTROL RELAY
Failure of the control relay could interrupt power supply to the fuel pump, injectors and ECM, resulting in start failure.
Caution Use caution when connecting jumper wires to the relay. If they are incorrectly connected the relay will be damaged.
Fig. 1 Control Relay Test
1. Remove the control relay.
2. Using an ohm meter, check the resistance between the terminals as shown in FIG. 1.
Fig. 2 Control Relay Test
3. Using an ohm meter, check the resistance terminals 1 and 4, when voltage is supplied and not supplied between terminals 6 and 7 as shown in FIG.
2.
Fig. 3 Control Relay Test
4. Using an ohm meter, check the resistance terminals 2 and 4, when voltage is supplied and not supplied between terminals 6 and 8 as shown in FIG.
3.