Mitsubishi Outlander GS45X. Manual — part 63

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CHASSIS ELECTRICAL

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Inspection Procedure 3: Stoplight does not illuminate or go out normally.

ETACS-
ECU

Stoplight Circuit

STOP LAMP
RELAY

STOPLIGHT
SWITCH

·

STOP LIGHT

·HIGH-MOUNTED STOP LIGHT

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.

COMMENTS ON TROUBLE SYMPTOM

If the stoplights do not illuminate or go out normally,
the stoplight relay power supply, ground circuit sys-
tem, stoplight switch, or the stoplight relay

*

may be

defective.
NOTE:

*

: The stoplight relay cannot be inspected

because it is a semiconductor relay.

.

PROBABLE CAUSES

• Malfunction of stoplight switch

• Malfunction of stoplight relay

• Damaged harness wires and connectors

DIAGNOSIS

Required Special Tools:

• MB992006: Extra fine probe

• MB991223: Harness set

STEP 1. Check stoplight relay connector C-133 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is stoplight relay connector C-133 in good condition?

YES : Go to Step 2.
NO : Repair the damaged parts

STEP 2. Resistance measurement at stoplight relay
connector C-133.
(1) Disconnect the connector, and measure at the wiring

harness side.

(2) Measure the resistance between stoplight relay connector

C-133 (terminal No. 8) and the body ground.

The measured value should be continuity exists (2
Ω or less).

Q: Does the measured resistance value correspond with

this range?
YES : Go to Step 4.
NO : Go to Step 3.

AC901075BD

Connector: C-133

ACA02655AY

Connectors: C-304, C-312

C-304

C-312

AC702818 DL

Harness side: C-133

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STEP 3. Check the wiring harness between stoplight relay
connector C-133 (terminal No. 8) and ground.
Check the ground line for open circuit.
Q: Is the wiring harness between stoplight relay connector

C-133 (terminal No. 8) and ground in good condition?
YES : Go to Step 4.
NO : Repair the wiring harness.

STEP 4. Check the stoplight switch.
Remove the stoplight switch.

• Check for continuity between the terminals of the switch.

Q: Is the stoplight switch in good condition?

YES : Go to Step 5.
NO : Replace the stoplight switch.

Check
condition

Terminal
connector of
tester

Normal
condition

At free position 1

− 2 (for

stoplight switch)

Continuity
exists

(2

Ω or less)

3

− 4 (for cruise

control)

No continuity

Press the
plunger from the
edge of the
outer case by
the dimension
shown in the
figure.

1

− 2 (for

stoplight switch)

No continuity

3

− 4 (for cruise

control)

Continuity
exists

(2

Ω or less)

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STEP 5. Check the battery power supply circuit to the
stoplight relay. Measure the voltage at stoplight relay
connector C-133.
(1) Disconnect stoplight relay connector C-133 measure the

voltage available at the wiring harness side of the
connector.

(2) Measure the voltage between stoplight relay connector

C-133 terminal 6 and ground.

• The voltage should measure approximately 12 volts

(battery positive voltage).

(3) Stoplight switch: ON

(4) Measure the voltage between stoplight relay connector

terminal No. 2 and the body ground.

• The voltage should measure approximately 12 volts

(battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery

positive voltage)?
YES : Go to Step 7.
NO : Go to Step 6.

STEP 6. Check ETACS-ECU connector C-304 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-304 in good condition?

YES : Go to Step 7.
NO : Repair the damaged parts

STEP 7. Check the wiring harness between stoplight relay
connector C-133 (terminal No. 2/6) and ETACS-ECU
connector C-304 (terminal No. 1).

• Check the power supply line (battery supply) for open circuit

and short circuit.

Q: Is the wiring harness between stoplight relay connector

C-133 (terminal No. 2/6) and ETACS-ECU connector
C-304 (terminal No. 1) in good condition?
YES : Go to Step 8.
NO : Repair the wiring harness.

AC608254EV

Harness side: C-133

AC608254EW

Harness side: C-133