Chevrolet CHEVY VAN G10 SERIES Service Manual page 197

C O M P L A IN T
Excessive Creep at Idle
High Hole Speeds
Dieseling
C A lJSE
Idle S top S olen oid
In op e rative
Step 1
Inoperative Id le Stop
Inoperative C E C Solenoid
Solenoid
1. C h eck for free m ovem ent 1. C heck for free m ovem ent
o f plunger.
o f plunger.
2 . C h eck for in correctly ad­ 2. C heck for in correctly ad­
ju sted plunger (o u t to o justed plunger.
far).
3 . R em ove
3. W ith ign ition off-solen oid solenoid and apply 12 volts
sh ou ld de-energize.
across
4 . I f solenoid de-energizes—
n oid d oes n ot energize it is
proceed to S tep 2. d efective.
4 . Turn ign ition o n and re­
m ove black lead from con ­
n e c t o r ,
de-energize.
5 . I f solenoid w as n o t at fault
p roceed to S tep 3.
TROUBLE SH O O TIN G GUIDE
SIX CYLINDER ENGINE
C A U S E
M alfunction in TCS S ystem C om p on en t. C h eck for: B low n f u s e -
L oose co n n ectio n s—B roken Wire—Broken or D iscon n ected h o ses—
Proper ground at all co m p o n en ts—Proper rou ting o f hoses.
C A lJSE
C E C Solenc >id Energized
at all Tim es
Step 2 Step 3
Inoperative T im e Relay
1 . R e m o v e
sw itch con n ector.
2. C heck relay to m ake sure
that it is c o o l, then turn
con n ector from ignition on .
3. S olen o id should
term inals. I f sole­ for 20 secon ds and then
de-energize. I f it d oes n ot
de-energize,
lead from tim e relay. S o le­
noid w ill de-energize if re­
lay is at fault. Proceed to
so len oid should
Step 4 if relay is n o t at
fault.
Step 4
Inoperative Transmission Switch
t e m p e r a t u r e 1. Start engine and put trans­
m i s s i o n in reverse
Hydra-matic or
m anuals and Powerglide.
(Pow erglide equipped vehi­
energize cles m ust have rear wheels
o f f floor and upshifted into
high.)
rem ove blue
2 . W h en t r a n s m is s io n
placed in position required
for test, the CEC Solenoid
sh ou ld energize. If it does
n ot energize, rem ove con­
n e c t o r at s w it c h
ground the terminal if sole­
n oid energizes the sw itch is
fa u lty .
3. I f the switch is n ot at fault
proceed to Step 5.
C O M P L A IN T
Poor High Gear Perform ance
S tum ble— S tall— Cold or H ot S tart
Excessive Fuel C onsum ption
D eceleration E xhaust " P o p ."
C A lJSE
Inoperative C E C S olen oid
Step 5
Tem perature Switch
M alfunction
1. C old e n g in e-T u rn the igni­
tion sw itch on . I f the CEC
on
S olen oid plunger d oes n ot
high on
energize or if it energizes
and retracts after 20 sec­
on d s, rem ove the sw itch
con n ector and ground the
cold term inal lead. This
w ill activate the solenoid
is
plunger, indicating a d efec­
tive sw itch.
2. Warm e n g in e -A llo w tem ­
perature sw itch to cool.
Then w ith the wires con-
and
n e c t e d a n d s w i t c h
g r o u n d e d , the solenoid
should energize and remain
energized. I f it d oes n ot the
sw itch is d efective.
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