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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Q: DTC P0748 PRESSURE CONTROL SOLENOID "A" ELECTRICAL
DTC DETECTING CONDITION:
Output signal circuit of line pressure solenoid is open or shorted.
TROUBLE SYMPTOM:
Excessive shift shock
WIRING DIAGRAM:
Step
1
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and
transmission.
3) Measure the resistance of harness
between TCM and transmission connector.
Connector & terminal
(B54) No. 9 — (B11) No. 19:
(B54) No. 5 — Chassis ground:
(B54) No. 14 — Chassis ground:
TCM
B54
E
B11
T4
T11
TRANSMISSION
Is the resistance less than 1
Ω?
5AT(diag)-60
Check
Go to step 2.
B54
1 2
3 4
5 6
7
8
9
10 11 12
13 14 15 16 17 18
19 20 21
22 23 24
B11
1 2
3 4
5
6 7
8
9 10
11 12
13
14 15
16
17 18
19 20
T11
1 2
3 4
5
6
7
8
9 10 11
12
AT-03182
Yes
No
Repair the open
circuit of harness
between TCM con-
nector and trans-
mission connector.
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