Toyota Celica 1993 AT200 series Repair Manual page 1035

A c - 8 0
A r R c o N D r r o N r N G s y s r E M - A r R c o N D r r o N E R A M p L T F T E R
W i r e H a r n e s s S i d e
A I R C O N D I T I O N E R A M P L I F I E R
A I R C O N D I T I O N E R A M P L I F I E R
I N S P E C T I O N
I N S P E C T A M P L I F I E R C I R C U I T
(a) Disconnect the amplifier and inspect the connector on
the wi16 harness side, as shown in the chart below.
Test cond itions:
r
lgnition switch ON
.
Temoerature control dial MAX COOL
o
Blower dial Hl
Tester connection to
t€rminal numbor
Condition
Speciliod valu6 (Continuity)
6 Ground Constant Continuity
T€ater connection to
tsrminal numbor
Condition
Spocif ied valus (Resistance)
t 1
Constant
r . 5 K O a r 2 0 " C ( 6 8 " F )
l 5 l 8 { E x . 7 A - F E )
Constant
A p p r o x . I l 5 O a t 2 0 " C ( 6 8 ' F )
7 - Ground
Constant
1 . 2 K O a t 2 0 " C ( 8 8 ' F )
T6st6r connoction to
lorminal number
Condition Specif i€d valu€ (Voltago)
4 - Ground {RHD only)
ECON 6witch on
Bsttery voltags
4 - Ground (RHO only)
ECON switch oft No voltago
5 - Ground
Constent
Approx, l0 - 14 V
1 0 - G r o u n d
A,/C switch on 8att6ry voltago
l 0 - G r o u n d
A/C dwitch otf No vollaga
1 2 - G r o u n d
A/C switch on B6ttery voltage
1 2 - G r o u n d
A/C switch olf No voltago
1 4 - G r o u n d
Cohstant Batt€ry voltag.
lf circuit is as specified, try replacing the amplifier
wilh a new one. lf the circuit is not as specified,
insp€ct ths circuits connected to oth6r parts.