General <Electrical> - Except Evolution: Other Mitsubishi Lancer IX

IMPROPER TERMINAL ENGAGEMENT CHECK

Terminals inside a connector may not engage properly even if the connectors engage. Make sure that each terminal does not come out of the connector when gently pulling each harness wire. If it does, repair or replace the terminal and/or connector.

Scheme 87

CONNECTOR TERMINAL ENGAGEMENT AND DISENGAGEMENT

Loosely engaged terminals can be repaired by removing the female terminal from the connector housing and raising its lance to establish better engagement. Removal of the connector terminal used for MFI and INVECS-II A/T control circuits can be done in the following manner.

Scheme 88

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Scheme 91

1. Insert a screwdriver [1.4 mm (0.06 inch) width] as shown in the figure, disengage the front holder, and remove it.
2. Push the harness wire of the terminal to be repaired deep into the connector from the harness side and hold it there.
3. Insert the tip of the screwdriver [1.4 mm (0.06 inch) width] into the connector as shown in the figure, raise the housing lance slightly with the tip, and pull out the terminal.
4. Insert a needle through the hole provided on the terminal and raise the contact point. Lightly squeeze the outer edge so the flats are parallel with the bottom.

Scheme 92

Scheme 93

1. Remove the waterproof cap by using a screwdriver.
2. Insert the tip of the screwdriver [1.4 mm (0.06 inch) or 2.0 mm (0.08 inch) width] into the connector as shown in the figure, raise the housing lance slightly with the tip, and pull out the terminal.
3. Insert a screwdriver through the hole provided on the terminal and raise the contact point. Lightly squeeze the outer edge so the flats are parallel with the bottom.

Scheme 94

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Scheme 96

1. Disengage the front holder with a screwdriver and remove it.
2. Insert the tip of a screwdriver [0.8 mm (0.03 inch) width] into the connector as shown in the figure, push it lightly to raise the housing lance, and pull out the terminal.
3. Press the contact point of the female terminal down by holding a screwdriver [1.4 mm (0.06 inch) width] as shown in the figure. Lightly squeeze the outer edge so the flats are parallel with the bottom.

Scheme 97

Scheme 98

1. Remove the waterproof cap.
2. Insert the tip of a screwdriver [1.4 mm (0.06 inch) width] into the connector as shown in the figure, press in the terminal lance, and pull out the terminal. CAUTION: Make sure the lance is pressed in before the terminal is inserted into the connector.
3. Press the contact point of the male terminal down by holding a screwdriver [1.4 mm (0.06 inch) width] as shown in the figure.

CHECKING SWITCHES

In a circuit diagram, a switch is shown in the normal condition.

Scheme 99

Scheme 100

1. Normally open or normally closed switch Switches are classified into those which open the circuit and those which close the circuit when off. Switches are shown in their normal state unless specified otherwise.
2. Switch connection This figure illustrates a complex switch. The continuity between terminals at each position is as indicated in the table below. SPECIFIED CONDITION SWITCH POSITION TESTER CONNECTION SPECIFIED CONDITION OFF - - 1st stage 1-5-6 Continuity 2nd stage 1-4-6 Continuity 3rd stage 1-3-6 Continuity 4th stage 1-2-6 Continuity

CHECKING RELAYS

Note. The deenergized state means that no current is flowing through the coil. The energized state means that current is flowing through the coil.

Scheme 101

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Scheme 104

1. When current flows through the coil of a relay, its core is magnetized to attract the iron piece, closing (ON) the contact at the tip of the iron piece. When the coil current is turned off, the iron piece returns to its original position by a spring, opening the contact (OFF).
2. By using a relay, a heavy current can be turned on and off by a switch using much less current. For example, in the circuit shown here, when the switch is turned on (closed), current flows to the coil of the relay. Then, its contact is turned on (closed) and the light comes on. The current flowing through the switch is much less than that for the light.
3. Relays may be classified as the normally open-type or the normally closed-type, depending on their contact construction. When a normally closed relay as illustrated here is checked, there should be continuity between terminals 1 and 2 and between terminals 3 and 4 when the relay is deenergized. There should be no continuity between terminals 3 and 4 when battery voltage is applied between terminals 1 and 2.

CHECKING FUSES

A blade type fuse has test taps provided to allow checking of the fuse itself without removing it from the fuse block. The fuse is okay if the test light comes on when its one lead is connected to the test taps (one at a time) and the other lead is grounded. Remember to turn the ignition switch to ON to ensure all circuits are live.

Scheme 105

CAUTIONS IN EVENT OF BLOWN FUSE

When a fuse is blown, there are two probable causes. One is that it is blown due to flow of current exceeding its rating. The other is that it is blown due to repeated on/off current flowing through it. Which of the two causes is responsible can be easily determined by visual check as described below.

Scheme 106

Scheme 107

1. Fuse blown due to current exceeding rating The illustration shows the state of a fuse blown due to this cause. In this case, do not replace the fuse with a new one hastily since a current heavy enough to blow the fuse has flowed through it. First, check the circuit for shorts and check for abnormal electric parts. After correcting shorts or replacing parts, use only a fuse of the same capacity as a replacement. Never use a fuse of larger capacity than the original fuse. If a larger capacity fuse is used, electric parts or wiring could be damaged, or could start a fire.
2. Fuse blown due to repeated turning current on and off The illustration shows the state of a fuse blown due to repeated current on/off. Normally, this type of problem occurs after a fairly long period of use and is less frequent than above. In this case, simply replace with a new fuse of the same capacity.

Scheme 108

Scheme 109

1. Check connections for looseness, rust, and stains.
2. Check terminals and wires for corrosion by battery electrolyte, etc.
3. Check terminals and wires for open circuit or frayed wires.
4. Check wire insulation and coating for damage, cracks, and wear.
5. Check conductive parts of terminals for contact with other metallic parts (vehicle body and other parts).
6. Check grounding parts to verify that there is complete continuity between attaching bolt(s) and vehicle body.
7. Check for incorrect wiring.
8. Check that harnesses are secured to prevent contact with sharp edges and corners or hot parts (exhaust manifold, pipe, etc.).
9. Check that harnesses are secured firmly to provide enough clearance from the fan pulley, fan belt, and other rotating or moving parts.
10. Check that the harness between fixed parts (such as the vehicle body) and vibrating parts (such as the engine) are long enough to allow for vibration and movement.

BATTERY HANDLING

When checking or servicing does not require power from the vehicle battery, be sure to disconnect the cable from the battery (-) terminal. This will prevent problems that could be caused by a short circuit. Disconnect the (-) battery terminal first and reconnect it last.

Scheme 110

GENERAL ELECTRICAL SYSTEM CHECK

A circuit consists of the power supply, switch, relay, load, ground, etc. There are various methods to check a circuit including an overall check, voltage check, short-circuit check, and continuity check. Each of the methods briefly described below apply only to circuits similar to the illustration.

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1. VOLTAGE CHECK Ground one lead wire of the test light. If a voltmeter is used instead of the test light, ground the grounding side lead wire. Connect the other lead wire of the test light to the power side terminal of the switch connector. The test light should come on or the voltmeter should indicate a voltage. Then, connect the test light or voltmeter to the motor connector. The test light should not come on, or the voltmeter should indicate no voltage. When the switch is turned ON in this state, the test light should come on, or the voltmeter should indicate a voltage, with the motor starting to run. The circuit illustrated here is normal. If there is any problem, such as the motor failing to run, check voltages beginning at the connector nearest to the motor until the faulty part is identified.
2. SHORT-CIRCUIT CHECK Because the fuse has blown, it is probable that there is a short circuit. Follow the procedures below to identify the short-circuit location. STEP 1. Remove the blown fuse and connect the test light across the fuse terminals (Circuit switch: OFF). Q: Does the test light illuminate? YES : Short-circuit exists between the fuse block and the switch. Repair the harness between the fuse block and the switch. NO : Go to Step 2. STEP 2. Turn the switch ON and disconnect the illumination light connector. Q: Does the test light illuminate? YES : Short-circuit exists between the switch and the connector. Repair the harness between the switch and the connector. NO : Short-circuit exists between the connector and the illumination light. Repair the harness between the switch and the connector.
3. CONTINUITY CHECK When the switch is in the "OFF" position and the contact points of terminals 1 and 2 are connected, the self-powered test light should illuminate or the ohmmeter should read 0 ohm. When the switch is the "ON" position and the contact points of terminals 3 and 4 are connected, the self-powered test light should come on or the ohmmeter should read 0 ohm.