4AT(diag)-41
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK HARNESS CONNECTOR BETWEEN
TCM AND ATF TEMPERATURE SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM.
3) Measure the resistance between TCM con-
nector terminals.
Connector & terminal
(B55) No. 23 — No. 12:
Is the resistance 500
:
or
more?
Go to step
2
.
Go to step
4
.
2
CHECK HARNESS CONNECTOR BETWEEN
TCM AND ATF TEMPERATURE SENSOR.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 23 — Chassis ground:
Is the resistance 1 M
:
or
more?
Go to step
3
.
Go to step
4
.
3
CHECK HARNESS.
Measure the resistance between TCM connec-
tor terminals while shaking the harness.
Connector & terminal
(B55) No. 23 — No. 12:
Does the resistance change?
Go to step
4
.
Replace the TCM.
<Ref. to 4AT-63,
Transmission Con-
trol Module
(TCM).>
4
CHECK HARNESS CONNECTOR BETWEEN
TCM AND ATF TEMPERATURE SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmis-
sion.
3) Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 12 — Chassis ground:
(B55) No. 23 — Chassis ground:
Is the resistance 1 M
:
or
more?
Go to step
5
.
Repair the short
circuit of harness
between TCM and
transmission har-
ness.
5
CHECK ATF TEMPERATURE SENSOR.
Measure the resistance between transmission
connector terminals.
Connector & terminal
(T4) No. 11 — No. 15:
Is the resistance 500
:
or
more?
Check short cir-
cuits in harnesses
or connectors, and
repair the defective
part.
Go to step
6
.
6
CHECK TRANSMISSION HARNESS.
1) Lift up the vehicle.
2) Drain the automatic transmission fluid.
CAUTION:
Do not drain ATF until it cools down.
3) Remove the oil pan.
4) Disconnect the harness connector from
control valve.
5) Measure the resistance between transmis-
sion connector and transmission ground.
Connector & terminal
(T4) No. 11 — Transmission ground:
(T4) No. 15 — Transmission ground:
Is the resistance 1 M
:
or
more?
Go to step
7
.
Replace the trans-
mission harness.
7
CHECK ATF TEMPERATURE SENSOR.
Measure the resistance between control valve
connector terminals.
Connector & terminal
(AT2) No. 4 — No. 9:
Is the resistance 500
:
or
more?
Check short cir-
cuits in harnesses
or connectors, and
repair the defective
part.
Replace the con-
trol valve body.
<Ref. to 4AT-58,
Control Valve
Body.>
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Page 725: ...EN H4SO diag 308 General Diagnostic Table ENGINE DIAGNOSTICS...
Page 926: ...GD H4SO 202 Diagnostic Trouble Code DTC Detecting Criteria GENERAL DESCRIPTION...
Page 1181: ...EX H4DOTC 16 Muffler EXHAUST...
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Page 1818: ...GD H4DOTC 230 Diagnostic Trouble Code DTC Detecting Criteria GENERAL DESCRIPTION...
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Page 3486: ...WI 67 Remote Engine Start System WIRING SYSTEM...