DI-306
-
DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
460
Author:
Date:
2001 SIENNA (RM787U)
DTC
C1237 / 37
Wrong Number of Teeth at 1 of 4 Wheels
CIRCUIT DESCRIPTION
DTC No.
DTC Detecting Condition
Trouble Area
C1237 / 37
Detection of any of conditions from 1. through 4.:
1. When the ignition switch is ON, the speed difference
between the rear right and rear left wheels is 5 km/h
(3mph) or more (vehicle speed: 100 km/h (62 mph) or
less).
2. When the ignition switch is ON, the slip difference be-
tween the reference wheel and any other wheels is 6 %
or more (vehicle speed: 100 km/h (62 mph) or more).
3. Continuous ABS control for 60 sec. or more.
4. Interference on 1 or more wheels for 20 sec. with the
brake pedal depressed, or for 5 sec. when the brake
pedal is not depressed.
Tire size
Speed sensor rotor
INSPECTION PROCEDURE
1
Check tire size.
NG
Replace tires so that all 4 tires are the same in
size.
OK
2
Check sensor rotor (See page
).
NG
Replace speed sensor rotor.
OK
3
NG
Replace speed sensor.
OK
DI6O5-02
