Differential: 3B-1
Driveline / Axle
Differential
Diagnostic Information and Procedures
Drive Train Symptom Diagnosis
B831G23204001
DTC “C20” (P1752) Diff-lock Relay Circuit Malfunction
B831G23204002
Refer to “DTC “C20” (P1752): Diff-lock Relay Circuit Malfunction in Section 1A (Page 1A-47)”.
Condition Possible cause Correction / Reference Item
Engine noisy (Noise
seems to came from front/
rear output shaft bevel
gear, front drive
(differential) bevel gear
and rear drive bevel gear)
Worn or damage drive and driven bevel
gears.
Replace.
Excessive backlash. Adjust.
Improper tooth contact. Adjust.
Damage bearing. Replace.
Worn or rubbing gears. Replace.
Worn output shaft spline. Replace output shaft.
Too large front drive gear thrust
clearance.
Adjust or replace.
Too large rear drive gear thrust
clearance.
Adjust or replace.
Power will not transmit
from the engine to the
front wheel
Broken drive and driven bevel gear
teeth.
Replace.
Worn or broken propeller shaft serration. Replace.
Broken or damaged front drive
(differential) gear or pinion.
Replace.
Improperly operated front differential
shifting motor.
Repair or replace.
Worn or damaged shifting sleeve, shaft
and fork of the 2WD/4WD and diff-lock
shifting.
Replace.
Worn or damaged universal joint. Replace.
Worn or damaged front drive shaft or
universal joint serration.
Replace.
Power will not transmit
from the engine to the
rear wheel
Broken drive and driven bevel gear
teeth.
Replace.
Broken rear output shaft. Replace.
Worn or broken rear drive shaft
serration.
Replace.
Worn or damaged coupling joint
serration.
Replace.
Broken or damaged rear drive and
driven bevel gears.
Replace.
Worn or damaged universal joint. Replace.
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