DTC P0999 [AW6AX-EL]

id0502j6804900

DTC P0999

Shift solenoid F circuit malfunction (short to power)

DETECTION CONDITION

•  Short circuit in shift solenoid F signal system (The solenoid circuit current value input to the TCM is continuously more than 1,333 mA for 100 ms or more).

Diagnostic support note:

•  This is a continuous monitor (CCM).

•  The MIL illuminates if the TCM detects the above malfunction condition during the first drive cycle.

•  A PENDING CODE is not available.

•  FREEZE FRAME DATA is available.

•  The AT warning light illuminates.

•  The DTC is stored in the TCM memory.

POSSIBLE CAUSE

•  Short to power in wiring harness between shift solenoid F terminal B and TCM terminal B21

•  Short to power in wiring harness between shift solenoid F terminal A and TCM terminal B16

•  Shift solenoid F malfunction

•  Damaged connector between line pressure control solenoid and TCM

•  TCM malfunction

DTC P0999	Shift solenoid F circuit malfunction (short to power)
DETECTION CONDITION	• Short circuit in shift solenoid F signal system (The solenoid circuit current value input to the TCM is continuously more than 1,333 mA for 100 ms or more). Diagnostic support note: • This is a continuous monitor (CCM). • The MIL illuminates if the TCM detects the above malfunction condition during the first drive cycle. • A PENDING CODE is not available. • FREEZE FRAME DATA is available. • The AT warning light illuminates. • The DTC is stored in the TCM memory.
POSSIBLE CAUSE	• Short to power in wiring harness between shift solenoid F terminal B and TCM terminal B21 • Short to power in wiring harness between shift solenoid F terminal A and TCM terminal B16 • Shift solenoid F malfunction • Damaged connector between line pressure control solenoid and TCM • TCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		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.
2		No	Go to the next step.
3	INSPECT TERMINAL COUPLE COMPONENT FOR POOR CONNECTION • Turn the ignition switch to the LOCK position. • Remove the TCM. (See TCM REMOVAL/INSTALLATION [AW6AX-EL].) • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Are terminals normal?	Yes	Go to the next step.
3		No	Replace the couple component, then go to Step 7.
4	INSPECT RESISTANCE OF SHIFT SOLENOID F CIRCUIT • Inspect for resistance between couple component terminals B21 and B16 (wiring harness-side). • Is resistance within 5.0—5.6 ohms? (See SOLENOID VALVE INSPECTION [AW6AX-EL].)	Yes	Go to go to Step 7.
4		No	Go to the next step.
5	INSPECT TERMINAL SHIFT SOLENOID F FOR POOR CONNECTION • Disconnect the shift solenoid F connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Are terminals normal?	Yes	Go to the next step.
5		No	Replace the couple component, then go to Step 7.
6	INSPECT TERMINAL COUPLE COMPONENT CIRCUIT FOR SHORT TO POWER • Inspect for continuity between couple component terminals (wiring harness-side). ― Terminal B21 and all terminals except B21/B16 ― Terminal B16 and all terminals except B21/B16 • Is there continuity?	Yes	Repair or replace the couple component, then go to the next step.
6		No	Replace the control valve body, then go to the next step. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6AX-EL].)
7	VERIFY TROUBLESHOOTING OF DTC P0999 COMPLETED • Make sure to reconnect all the disconnected connectors. • Clear the DTC from the memory using the M-MDS. • Drive the vehicle in D range and make sure that 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 [AW6AX-EL].)
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE • Perform the “After Repair Procedure”. (See AFTER REPAIR PROCEDURE [AW6AX-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [AW6AX-EL].)
8		No	DTC troubleshooting completed.