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Electrical Troubleshooting (,97 Model)
Troubleshooting Flowchart - Lock-up Control Solenoid Valve B
• aBO II
Scan Tool indicates Code
P1758.
•
Self-diagnosis
lQ.-i
indicator light
blinks
twice.
Check
and
reco
rd the fre
eze
data
in
case
it
is needed
later
for prob-
lem
verification
.
Clear
the
PCM,
and test-drive the
vehicle.
"-
NO
Did
the
co de
return
?
./
YES
Chec:k for a Short to
Power:
1.
Turn the
ignition switch
OFF.
2.
Disconnect the A
(32P)
and B
(25P)
conn
ector
s from
the
PCM.
3.
Turn the
ignition
switch
ON
(II).
4.
Measu
re
the voltage between
the
84 and
AS
or A22
termi-
nals.
"-
YES
Is
there
vo
ltage
?
/
NO
Measure Lock-up Control Sole-
noid Valve
B
Resistance:
1.
Turn the
ig
nition
switch
OFF.
2.
Measure
'he
re
sista
nce
between the 84 and A9 or
A22 terminals.
.......
YES
Is
the
resistan
ce
12
-
25
m
/
NO
To pag
e
14-67
14-66
Possible Cause
•
Disconnected lock-up
control
solenoid valve AlB assembly
connector
•
Short or open in lock-up control
solenoid valve B wire
• Faulty lock-up control solenoid
valve B
The system is OK at this time.
Verify that all connectors
in
the
circuit are making good
contact.
PC M CONNECTORS
LG1 IBRN/BL
A 132PI
=
[
, [, 3 •
• •
I12V
1516
171819
27
LG21BRN/BL
KI
KI
LCB IGRN/BLKI
r----(
'!.
)-----,
B 125PI
, 10 11
22
23
24
Wire si de of
female
terminals
Repair
short
to power
in
the wire
between the
84
terminal and the
lock-up control solenoid valve
B.
LG1 IBRN/BLK
=
1
'i2
3 •
•
•
[12V
151617 1819
20
V
21
LG21BRN/BL KI
Check for loose terminal fit
in
the
PCM connectors
.
If
necessary,
substitute
a
known -good sole-
noid valve assembly or PCM and
recheck.
,---{n
l
-_ L-.:.
C,Br-IG_RN
--,
I_B_LK...:I---.
9 10
11
22 23 24
L - -
-__
--{n~
____
~
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Table of Contents
Troubleshooting
