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Electrical Troubleshooting
Troubleshooting Flowchart - Engine Coolant Temperature
(EGTISensor
Polribl. Cluta
. Dirconnoct.d Engin. Coollnt
Tampaolur€ IECTI aanaor con.
noctot
. Short or opcn In ECT..n.or
. F.ulty ECT r.n.or
Tctrrt oot{NEcToRs
WIRE SIDE OF FEMAII TERi'IINAIS
U
{
M6esur. ECT Voh.ge:
1. Turn the ignition switch OFF.
2 . C o n n e c t t h e A ( 2 6 P ) a n d
B (22P) connectors to the TCM.
3. Start the engine and w6rm it
uP to normal operating tem-
p e r a t u r e ( t h e r a d i a t o r f a n
comes on),
4, Measure the voltage between
the 83 and A13 or A26 termi-
nats.
I
i
:
r t
.f
ls there less than 1 V?
Ch.cl fo. looso TCM connac{or3,
t nacaasary, substituto a known"
good TCM rnd r.chock.
' OBD ll Scsn Tool Indicat6 Code
P1792.
. S e t t ' d i a g n o 3 i 3 E
i n d i c a t o l
light indicates Code 10.
Chock tor Anothor Codo or MIL
Blinking:
1. Turn the ignition switch ON (ll).
2 . C h e c k w h € t h e r r h e O B D l l
s c a n t o o l i n d i c a t e s a n o t h e r
code or the Malfunction Indi-
cator Lamp (MlL) blinks (see
section 11).
Does the OBD ll scan tool indi-
cate another code or is the
MIL blinking?
Moasure VREF Voh.go:
1. Turn the ignition switch OFF.
2 . D i s c o n n e c t t h e A { 2 6 P ) a n d
B (22P) conneotors from the
TCM.
3. Turn the ignition switch ON (ll).
4. Measu.e the voltage between
the 820 and A13 or A26 tormi-
nals.
Bap|ir open or thort in tha wirc
b.two.r
th. B:m t.rminll .nd tho
ECM.
ls there approx. 5 V?
napalr opln in iha wlra brtwaan
the lB t.rminrl lnd th. ECT r.n-
ao1.
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Table of Contents
Troubleshooting
