DTC 1106
IMPROPER SHIFTING TO 4TH GEAR POSITION OR IMPROPER TORQUE CONVERTER CLUTCH OPERATIONDESCRIPTION
- This is a "failure" item indicated by the MIL.
- This is indicated when the vehicle is being driven at any gear position other than 4th while the A/T control unit is instructing the A/T to shift the gear in the 4th position. Also, this is indicated when the vehicle is being driven without the torque converter clutch locked up while the A/T control unit is instructing the A/T to lock up the torque converter clutch.
- The detected item, "A/T 4TH OR TCC", is not determined as a fault unless the A/T control unit self-diagnosis system is in the "No Failure" condition. When "A/T 4TH OR TCC" is displayed, it indicates that the gears are not properly shifted. The problem is not caused by electrical failure of the A/T (circuits open or shorted) but by mechanical failure (control valve sticking, improper solenoid valve operation, malfunctioning oil pump or torque converter clutch, etc.).
OVERALL FUNCTION CHECK
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT
1. Start engine and warm up ATF.
2. Select "SELF-DIAG RESULTS" mode for ECM with CONSULT.
3. Start vehicle with selector lever in D and throttle opening halfway. Check that vehicle runs through gear shift of D1 -> D2 -> D3 -> D4 -> D4 lock-up, in accordance with shift schedule. Refer to shift schedule.
OR
WITH GST
1. Start engine and warm up ATF.
2. Start vehicle with selector lever in D and throttle opening halfway. Check that vehicle runs throu9h gear shift of D1 -> D2 -> D3 -> D4 -> D4 lock-up, in accordance with shift schedule. Refer to shift schedule.
3. Select "MODE 3" with GST.
OR
WITH NO TOOLS
1. Start engine and warm up ATF.
2. Start vehicle with selector lever in D and throttle opening halfway. Check that vehicle runs through gear shift of D1 -> D2 -> D3 -> D4 -> D4 lock-up, in accordance with shift schedule. Refer to shift schedule.
3. Perform self-diagnosis for ECM.
DIAGNOSTIC PROCEDURE