5A-44 Automatic Transmission/Transaxle:
No Lock-Up Occurs
S5JB0A5104021
System Description
TCM turns TCC pressure control solenoid OFF under any of the following conditions.
• Engine coolant temperature is lower than 60 °C (140 °F).
• 4L/N switch is turned ON. (4L mode)
• Brake light switch is turned ON. (Brake pedal is depressed)
• TCM detects the following DTCs.
P0712, P0713, P0717, P0722, P0962, P0963, P0973, P0974, P0976, P0977, P1702, P1703, P1774, P1777, P2763
and P2764
Troubleshooting
WARNING
!
• When performing a road test, select a place where there is no traffic or possibility of a traffic
accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out with 2 persons, a driver and tester, on a level road.
4 “3” position switch signal inspection
1) With ignition switch ON, check voltage between terminal
“E92-20” of TCM connector and ground under the
following conditions.
“3” position switch specification
Shift selector lever to “P”, “R”, “N” or “D” range: 2.9
– 3.8 V
Shift selector lever to “3”, “2” or “L” range: 1.4 – 2.0
V
Is result as specified?
Go to Step 5. Faulty “3” position
switch or its circuit. If
OK, substitute a known-
good TCM and recheck.
5 4L/N switch signal inspection
1) With ignition switch ON, check voltage between terminal
“E93-4” of TCM connector and ground.
4L/N switch specification
Transfer gear position “4H”: Battery voltage
Transfer gear position “4L” or “N”: 0 – 2 V
Is result as specified?
Substitute a known-
good TCM and recheck.
Faulty 4L/N switch or its
circuit. If OK, substitute
a known-good TCM and
recheck.
Step Action Yes No
Step Action Yes No
1 Was “A/T System Check” performed? Go to Step 2. Go to “A/T System
Check: ”.
2 Check DTC
Is DTC P0712, P0713, P0717, P0722, P0962, P0963,
P0973, P0974, P0976, P0977, P1702, P1703, P1774,
P1777, P2763 or P2764 detected?
Perform DTC Flow to
repair and retry.
Go to Step 3.
3 ECT check
1) Warm up engine to normal operating temperature.
2) Check ECT using scan tool.
Is ECT more than 60
°
C (140
°
F)?
Go to Step 4. Faulty ECT sensor, its
circuit or engine cooling
system. If OK, substitute
a known-good TCM and
recheck.
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