Toyota Celica 1993 AT200 series Repair Manual page 798

BE-65
BoDY ELEcrRlcAL sYsrEM - co!4 ql N-4Il-q-Nl!!IER
S P E E D S E N S O R I N S P E C T I O N
INSPECT SPEED SENSOR OPERATION
(a) Connect the positive (+)lead from battsry to terminal
1 a n d n e g a t i v e ( - ) l e a d t o t o r m i n a l 2 .
(b) Connect tho positive (+) lead from tost€r to terminal 3
a n d n e g a t i v e ( - ) l e a d t o t e r m i n a l 2 .
(c) Rotate sh aft.
(d) Check that thers is a voltage change from approx 0 V
to 1 1 V or more betwesn terminals 2 and 3.
HINT: The voltage change should be 4 times for every
revolution of the speed sensor shaft.
lf oDoration is not as spacified, replace th6 sensor.
T A C H O M E T E R l N S P E C T I O N
INSPECT TACHOMETER
O N _ V E H I C L E
(a) Connect a tuns-up tsst tachometer, and start the
e n g i n e .
NOTICE: Raversing the connection of the tachomater will
damage tha transistors and diodes inside.
( b ) C o m p a r e t h e t s s t e r a n d t a c h o m e t e r i n d i c a t i o n s .
lf error is excessive, replace the tachometer'
D C 1 3 . 5 V , 2 5 " C ( 7 7 ' F )
Standard indication (rPm)
Allowabl€ rang€ (rpm)
700
630 - 770
1 0 0 0
9 0 0 - 1 1 0 0
2000
1 8 5 0 - 2 1 5 0
3000
2800 - 3200
4000
3800 - 4200
5000
4800 - 5200
6000
5 7 5 0 - 6 2 5 0
7 0 0 0
5700 - 7300