Toyota Celica Supra 1986 Service And Repair Manual page 597

BODY ELECTRICAL SYSTEM - Instruments and Sender
Gaugn
BE-49
SECTION TROUBLE
I
Tachomet•
Zero indic8tion - n with qine ruMi,.
Remove meter and connect
sub·hamess {SST)
Q)
With the ignition S/W at ON position. does
No
Bad wiring l:>et-n
voltage between terminals 16and 17 of sub-
igniter- and
meter
harness fluctuate with variations in engine rpm?
Yes
®
With the ignition S/W at ON position, does volt·
No
i
age between terminals 3 and 6 of tachometer con·
Replace speedometer
I
nectorfluctuate between 0 and 1.5V when engine
speed increases from 2,000 to 3,000 rpm?
Yes
Replace tachometer
j
2
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Sul>h••-•
ISSTI
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