Mitsubishi Montero Sport (2004+). Manual - part 404

 

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Mitsubishi Montero Sport (2004+). Manual - part 404

 

 

HOW TO DIAGNOSE

TSB Revision

GENERAL <ELECTRICAL>

00E-13

GENERAL ELECTRICAL SYSTEM CHECK

M1001005300045

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.
1. VOLTAGE CHECK

(1) Ground one lead wire of the test light. If a voltmeter is 

used instead of the test light, ground the grounding side 
lead wire.

(2) 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.

(3) 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.

(4) 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 narrow down 
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.

ACX00956 AB

POWER SUPPLY

FUSE

SWITCH

MOTOR

(3)

ON  (2)

OFF

(1)

TEST LIGHT
(OR
VOLTMETER)

ACX00957 AB

POWER SUPPLY

SWITCH

OFF

ILLUMINATION
LIGHT

TEST
LIGHT

FUSE BLOCK
(REMOVE
THE FUSE)

SHORT-CIRCUIT
LOCATION

HOW TO DIAGNOSE

TSB Revision

GENERAL <ELECTRICAL>

00E-14

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 
connector and the illumination light.

ACX00958 AB

POWER SUPPLY

SWITCH

ON

ILLUMINATION
LIGHT

TEST
LIGHT

FUSE BLOCK
(REMOVE
THE FUSE)

DISCONNECT
THE LOAD

SHORT-CIRCUIT
LOCATION

ACX00959 AB

POWER SUPPLY

SWITCH

ON

ILLUMINATION
LIGHT

TEST
LIGHT

FUSE BLOCK
(REMOVE
THE FUSE)

DISCONNECT
THE LOAD

SHORT-CIRCUIT
LOCATION

HOW TO DIAGNOSE

TSB Revision

GENERAL <ELECTRICAL>

00E-15

3. CONTINUITY CHECK

(1) When the switch is in the "OFF" position and the contact 

points of terminals 1 and 2 are connected, the self power 
test light should illuminate or the ohmmeter should read 0 
ohm.

(2) When the switch is the "ON" position and the contact 

points of terminals 3 and 4 are connected, the self power 
test light should come on or the ohmmeter should read 0 
ohm.

ACX00960 AB

SELF POWER TEST
LIGHT (OR OHMMETER)

1 4

2 3

ON

OFF

ON

OFF

NOTES

 

 

 

 

 

 

 

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