DTC P0998:00 [AY6A-EL, AY6AX-EL]

id0502k1827300

DTC P0998:00 | Shift solenoid F circuit low
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DETECTION CONDITION | • Conditions: TCM communication normal • Circumstances: Shift solenoid F system disconnection or short circuit to GND detected • Time period: Determined after 5 consecutive times lasting 0.1 or more seconds Diagnostic support note: • The MIL illuminates if the TCM detects the above malfunction condition during the first drive cycle. • 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 | • Emergency mode 1
POSSIBLE CAUSE | • Coupler component connector or terminal malfunction • Short to GND in wiring harness between shift solenoid F terminal B and TCM terminal B21 • Short to GND in wiring harness between shift solenoid F terminal A and TCM terminal B16 • Open circuit between shift solenoid F terminal B and TCM terminal B21 • Open circuit between shift solenoid F terminal A and TCM terminal B16 • Shift solenoid F connector or terminal malfunction • Solenoid valve malfunction ― Shift solenoid F • TCM malfunction

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 COUPLER COMPONENT CONNECTOR FOR POOR CONNECTION • Switch the ignition OFF. • Remove the TCM. (See TCM REMOVAL/INSTALLATION [AY6A-EL, AY6AX-EL].) • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair or replace the terminal, then go to Step 8.
No | Go to the next step.
4 | INSPECT SHIFT SOLENOID F CIRCUIT FOR SHORT TO GND • Switch the ignition OFF. • Inspect for continuity between the following circuits: ― Coupler component terminal B21 (wiring harness-side) and body GND ― Coupler component terminal B16 (wiring harness-side) and body GND • Is there continuity? | Yes | Repair or replace the wiring harness for a possible short to GND, then go to Step 8.
No | Go to the next step.
5 | INSPECT SHIFT SOLENOID F CONNECTOR FOR POOR CONNECTION • Switch the ignition OFF. • Disconnect the shift solenoid F connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair or replace the terminal, then go to Step 8.
No | Go to the next step.
6 | INSPECT SHIFT SOLENOID F • Inspect the shift solenoid F. (See SHIFT SOLENOID F INSPECTION [AY6A-EL, AY6AX-EL].) • Is there any malfunction? | Yes | Replace the control valve body, then go to Step 8. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AY6A-EL, AY6AX-EL].)
No | Go to the next step.
7 | INSPECT SHIFT SOLENOID F CIRCUIT FOR OPEN CIRCUIT • Switch the ignition OFF. • Inspect for continuity between the following circuits: ― Shift solenoid F terminal B (wiring harness-side) and coupler component terminal B21 (wiring harness-side) ― Shift solenoid F terminal A (wiring harness-side) and coupler component terminal B16 (wiring harness-side) • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for a possible open circuit, then 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 and transaxle. 3. Drive the vehicle in D position and make sure that the gears shift smoothly from 1GR to 6GR. • 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.