DTC P2758 [SJ6A-EL]

id050208805200

DTC P2758

Torque converter clutch (TCC) stuck on

DETECTION CONDITION

•  TCM detects that TCC control solenoid does not change from off when engine is running

Diagnostic support note:

•  The MIL illuminates if the TCM detects the above malfunction condition in two consecutive drive cycles.

•  The AT warning light illuminates if the TCM detects the above malfunction condition in two consecutive drive cycles.

•  PENDING CODE is available.

•  FREEZE FRAME DATA is not available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  Deteriorated ATF

•  ATF level low

•  Line pressure low

―  Oil pump malfunction

―  TCC control solenoid stuck

―  Line pressure control solenoid stuck

•  TCM malfunction

DTC P2758	Torque converter clutch (TCC) stuck on
DETECTION CONDITION	• TCM detects that TCC control solenoid does not change from off when engine is running Diagnostic support note: • The MIL illuminates if the TCM detects the above malfunction condition in two consecutive drive cycles. • The AT warning light illuminates if the TCM detects the above malfunction condition in two consecutive drive cycles. • PENDING CODE is available. • FREEZE FRAME DATA is not available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Deteriorated ATF • ATF level low • Line pressure low ― Oil pump malfunction ― TCC control solenoid stuck ― Line pressure control solenoid stuck • TCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
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.
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 repair 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 ATF CONDITION • Turn the ignition switch to the LOCK position. • Inspect the ATF condition. ― Clear red: Normal ― Light red (pink): Water mixed in fluid ― Reddish brown: Deteriorated ATF • Is it normal? (See AUTOMATIC TRANSMISSION FLUID (ATF) INSPECTION [SJ6A-EL].)	Yes	Go to the next step.
3		No	If the ATF color is milky or reddish brown, replace ATF, then go to Step 7. (See AUTOMATIC TRANSMISSION FLUID (ATF) REPLACEMENT [SJ6A-EL].)
4	INSPECT ATF LEVEL • Start the engine. • Warm up the AT. • Is the ATF level within the specification? (See AUTOMATIC TRANSMISSION FLUID (ATF) LEVEL ADJUSTMENT [SJ6A-EL].)	Yes	Go to the next step.
4		No	Add ATF to the specified level, then go to Step 7. (See AUTOMATIC TRANSMISSION FLUID (ATF) LEVEL ADJUSTMENT [SJ6A-EL].)
5	INSPECT LINE PRESSURE • Start the engine. • Measure the line pressure. (See MECHANICAL SYSTEM TEST [SJ6A-EL].) • Are the line pressures within the specifications?	Yes	Go to the next step.
5		No	All ranges: Replace the oil pump, then go to Step 7. Any ranges: Replace the control valve body, then go to Step 6. (See CONTROL VALVE BODY REMOVAL [SJ6A-EL].) (See CONTROL VALVE BODY INSTALLATION [SJ6A-EL].)
6	INSPECT SOLENOID VALVE • Inspect the solenoid valve. (See SOLENOID VALVE INSPECTION [SJ6A-EL].) • Is it normal?	Yes	Go to the next step.
6		No	Replace the control valve body, then go to the next step. (See CONTROL VALVE BODY REMOVAL [SJ6A-EL].) (See CONTROL VALVE BODY INSTALLATION [SJ6A-EL].)
7	VERIFY TROUBLESHOOTING OF DTC P2758 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 range and make sure that the gears shift smoothly from 1GR to 6GR and TCC is operated. • Is the PENDING CODE same as the DTC present?	Yes	Replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION [SJ6A-EL].)
7		No	Go to the next step.
8	VERIFY NO DTC HAS BEEN PRESENTED • Perform the “Reading DTCs Procedure”. (See AUTOMATIC TRANSMISSION ON-BOARD DIAGNOSTIC FUNCTION [SJ6A-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SJ6A-EL].)
8		No	DTC troubleshooting completed.