No Lock-Up Occurs: 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.

TROUBLESHOOTING CHART

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 P0741, P0962, P0963, P0966, P0967 P0970, P0971, P0973, P0974, P0976, P0977, P0985, P0986, P1703, P2763, P2764 or U0001 detected?	Perform DTC Flow to repair and retry.	Go to Step 3.
3	ECT check Warm up engine to normal operating temperature. Check ECT using scan tool. Is ECT more than 50°C (122°F)?	Go to Step 4.	Faulty ECT sensor, its circuit or engine cooling system. If OK, substitute a known-good TCM and recheck.
4	"4WD LOW" switch signal inspection With ignition switch ON, check voltage between terminal "E229-18" of TCM connector and ground. "4WD LOW" switch specification Transfer gear position "2H" or "4H": Battery voltage Transfer gear position "4L" or "N": 0 - 2 V Is result as specified?	Go to Step 5.	Faulty "4WD LOW" switch or its circuit. If OK, substitute a knowngood TCM and recheck.
5	Brake light switch signal inspection With ignition switch ON, check voltage between terminal "E61-34" of ECM connector and ground. Brake light switch specification Brake pedal is released: 0 - 1 V Brake pedal is depressed: Battery voltage Is result as specified?	Go to Step 6.	Mis-adjusted brake light switch, faulty brake light switch or its circuit. If OK, substitute a known-good TCM and recheck.
6	Cruise control signal inspection With ignition switch ON, check voltage between terminal "E229-19" of TCM connector and ground. Is it battery voltage?	Substitute a known-good TCM and recheck.	Faulty cruise control module or its circuit. If OK, substitute a knowngood TCM and recheck.