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SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-245
STEP 6. Check the wiring harness between windshield
wiper motor connector A-03 (terminal 2) and front-ECU
connector A-12X (terminal 29).
Q: Is the wiring harness between windshield wiper motor
connector A-03 (terminal 2) and front-ECU connector
A-12X (terminal 29) in good condition?
YES : Replace the front-ECU. The windshield wiper should
stop at the predetermined park position.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. Verify that
the windshield wiper works normally
Page 275 of 1500
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-275
INSPECTION PROCEDURE H-6: Headlamp and Taillamp: The front park lamps, taillamps or the
licence plate lamps do not illuminate.
.
TECHNICAL DESCRIPTION (COMMENT)
If the front park lamps, taillamps or the licence plate
lamp do not illuminate, their bulb may be defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The front park lamp bulb may be defective
The stop/taillamp bulb may be defective
The licence plate lamp bulb may be defective
The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
.
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SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-276
DIAGNOSIS
Required Special Tool:
MB991223: Harness Set
STEP 1. Check the operation of each lamp.
Q: Which lamp does not illuminate?
front park lamp (LH), taillamp (LH), and licence plate
lamp : Go to Step 2.
front park lamp (RH), taillamp (RH) : Go to Step 4.
taillamp (LH) and licence plate lamp : Go to Step 6.
taillamp (LH) : Go to Step 8.
taillamp (RH) : Go to Step 13.
front park lamp (LH) : Go to Step 19.
front park lamp (RH) : Go to Step 25.
licence plate lamp : Go to Step 31.
All lamps : Refer to Inspection Procedure H-1 "The
taillamps do not illuminate normally P.54B-260."
STEP 2. Check front-ECU connector A-11X for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is front-ECU connector A-11X in good condition?
YES : Go to Step 3.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. The front park lamp (LH), taillamp (LH), and
the licence plate lamp should illuminate normally.
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SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-277
STEP 3. Check the wiring harness between intermediate
connector C-25 (terminal 10) and front-ECU connector
A-11X (terminal 4).
Q: Is the wiring harness between intermediate connector
C-25 (terminal 10) and front-ECU connector A-11X
(terminal 4) in good condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. The front
parking lamp (LH), taillamp (LH),and the licence plate
lamp should illuminate normally.
STEP 4. Check intermediate connector C-25 and front-ECU
connector A-11X for loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Q: Are intermediate connector C-25 and front-ECU
connector A-11X in good condition?
YES : Go to Step 5.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. The front parking lamp (RH), and the
taillamp (RH) should illuminate normally.
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SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-278
STEP 5. Check the wiring harness between intermediate
connector C-25 (terminal 8) and front-ECU connector
A-11X (terminal 4).
Q: Is the wiring harness between intermediate connector
C-25 (terminal 8) and front-ECU connector A-11X
(terminal 4) in good condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. The front
parking lamp (RH), and the taillamp (RH) should
illuminate normally.
STEP 6. Check intermediate connector C-25 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is intermediate connector C-25 in good condition?
YES : Go to Step 7.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. The taillamp (LH) and the licence plate lamp
should illuminate normally.
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SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-284
STEP 18. Check front combination lamp (LH) connector
A-20 for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Is front combination lamp (LH) connector A-20 in good
condition?
YES : Go to Step 19.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Check that the front park lamp (LH)
illuminates normally.
STEP 19. Check the front park lamp bulb (LH).
(1) Remove the front park lamp bulb (LH).
(2) Verify that the front park lamp bulb (LH) is not damaged or
burned out.
Q: Is the front park lamp bulb (LH) in good condition?
YES : Go to Step 20.
NO : Replace the front park lamp bulb (LH). Verify that the
front park lamp (LH) illuminates normally.
STEP 20. Check the ground circuit to the front parking
lamp (LH). Measure the resistance at front combination
lamp (LH) connector A-20.
(1) Disconnect front combination lamp (LH) connector A-20
and measure the resistance available at the wiring harness
side of the connector.
(2) Measure the resistance value between terminal 5 and
ground.
The resistance should be 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 22.
NO : Go to Step 21.
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SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-285
STEP 21. Check the wiring harness between front
combination lamp (LH) connector A-20 (terminal 5) and
ground.
Q: Is the wiring harness between front combination lamp
(LH) connector A-20 (terminal 5) and ground in good
condition?
YES : Replace the front combination lamp socket (LH).
Verify that the front parking lamp (LH) illuminates
normally.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. Verify that
the front park lamp (LH) illuminates normally.
STEP 22. Check the wiring harness between front
combination lamp (LH) connector A-20 (terminal 2) and
front-ECU connector A-11X (terminal 4).
Q: Is the wiring harness between front combination lamp
(LH) connector A-20 (terminal 2) and front-ECU
connector A-11X (terminal 4) in good condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. Verify that
the front park lamp (LH) illuminates normally.
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SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-286
STEP 23. Check front combination lamp (RH) connector
A-32 for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Is front combination lamp (RH) connector A-32 in good
condition?
YES : Go to Step 24.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Check that the front park lamp (RH)
illuminates normally.
STEP 24. Check the front parklamp bulb (RH).
(1) Remove the front park lamp bulb (RH).
(2) Verify that the front park lamp bulb (RH) is not damaged or
burned out.
Q: Is the front park lamp bulb (RH) in good condition?
YES : Go to Step 25.
NO : Replace the front park lamp bulb (RH). Verify that the
front park lamp (RH) illuminates normally.
STEP 25. Check the ground circuit to the front parking
lamp (RH). Measure the resistance at front combination
lamp (RH) connector A-32.
(1) Disconnect front combination lamp (RH) connector A-32,
and measure the resistance available at the harness side of
the connector.
(2) Measure the resistance value between terminal 5 and
ground.
The resistance should be 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 27.
NO : Go to Step 26.