DTC P074B:00 [AY6A-EL, AY6AX-EL]

id0502k1547900

DTC P074B:00 | Gear 3 stuck
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DETECTION CONDITION | • Conditions: ATF temperature 20 °C {68 °F} or more, speed sensor normal, TCM communication normal, accelerator pedal position 10% or more, driving in D position, 3GR • Circumstances: Not in 3GR ratio detected • Time period: Determined after 5 times lasting 1 or more seconds Diagnostic support note: • The MIL does not illuminate. • The AT warning light illuminates. • PENDING CODE is not available. • FREEZE FRAME DATA is available. • The DTC is stored in the TCM memory.
FAIL-SAFE FUNCTION | • Shifting to safe gear
POSSIBLE CAUSE | • Deteriorated ATF • ATF level low • Line pressure malfunction • Stall speed malfunction • Solenoid valve malfunction ― Line pressure control solenoid ― Shift solenoid C ― Shift solenoid F • Clutch/brake malfunction ― C2 clutch ― B1 brake • ATX malfunction • Control valve body malfunction • TCM malfunction
SYSTEM WIRING DIAGRAM | —

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded on the repair order? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related repair information available? | Yes | Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | INSPECT FOR ATF LEAKAGE • Verify that there is no ATF leaking from the transaxle case, and the connecting surfaces of the transaxle and the engine. • Is any ATF leakage verified? | Yes | After repairing the spot where there is ATF leakage, adjust the ATF level, then go to Step 8. (See AUTOMATIC TRANSAXLE FLUID (ATF) LEVEL ADJUSTMENT [AY6A-EL, AY6AX-EL].)
No | Go to the next step.
4 | INSPECT ATF CONDITION • Inspect the ATF condition. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [AY6A-EL, AY6AX-EL].) • Is it normal? | Yes | Go to the next step.
No | Replace the ATF, then go to Step 8. (See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [AY6A-EL, AY6AX-EL].)
5 | INSPECT LINE PRESSURE • Perform the “Line Pressures Test”. (See MECHANICAL SYSTEM TEST [AY6A-EL, AY6AX-EL].) • Is there any malfunction? | Yes | Repair or replace malfunctioning part according to test result, then go to Step 8.
No | Go to the next step.
6 | INSPECT STALL SPEED • Perform the “Stall Test”. (See MECHANICAL SYSTEM TEST [AY6A-EL, AY6AX-EL].) • Is there any malfunction? | Yes | Repair or replace malfunctioning part according to test result, then go to Step 8.
No | Go to the next step.
7 | INSPECT SOLENOID VALVE • Inspect the following solenoid valves: ― Line pressure control solenoid (See LINE PRESSURE CONTROL SOLENOID INSPECTION [AY6A-EL, AY6AX-EL].) ― Shift solenoid C (See SHIFT SOLENOID C INSPECTION [AY6A-EL, AY6AX-EL].) ― Shift solenoid F (See SHIFT SOLENOID F INSPECTION [AY6A-EL, AY6AX-EL].) • Is there any malfunction? | Yes | Replace malfunctioning part according to test result, then go to the next step.
No | Go to the next step.
8 | VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all the disconnected connectors. • Clear the DTC using the M-MDS. • Perform the following procedure to ensure that the DTC has been resolved: 1. Start the engine. 2. Warm up the engine to normal operating temperature. 3. Drive the vehicle in D position, at 20 km/h {13 mph} or more for 2 s or more. • Is the same DTC present? | Yes | Replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION [AY6A-EL, AY6AX-EL].)
No | Go to the next step.
9 | VERIFY NO DTCs ARE PRESENT • Perform the “Reading DTCs Procedure”. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [AY6A-EL, AY6AX-EL].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [AY6A-EL, AY6AX-EL].)
No | DTC troubleshooting completed.