DTC P0841:00 [FS5A-EL]

id050221822500

DTC P0841:00

Oil pressure switch circuit malfunction

DETECTION CONDITION

•  The TCM detects no signal from the oil pressure switch when the following conditions are met.

―  1GR, 2GR or 3GR

―  Revolution ratio of the input revolution to output revolution: 0.91—3.07

•  The TCM detects input signal from the oil pressure switch when the following conditions are met.

―  4GR or 5GR

―  Revolution ratio of the input revolution to output revolution: 0.64—0.81

Diagnostic support note

•  The MIL does not illuminate.

•  The AT warning light does not illuminate.

•  PENDING CODE is not available.

•  FREEZE FRAME DATA is not available.

•  The DTC is stored in the TCM memory.

POSSIBLE CAUSE

•  Deteriorated ATF

•  ATF level low

•  Line pressure malfunction

•  Oil pressure switch connector or terminal malfunction

•  Short to GND in wiring harness between oil pressure switch terminal A and TCM terminal S

•  Oil pressure switch malfunction

•  TCM connector or terminal malfunction

•  Open circuit in wiring harness between oil pressure switch terminal A and TCM terminal S

•  TCM malfunction

DTC P0841:00	Oil pressure switch circuit malfunction
DETECTION CONDITION	• The TCM detects no signal from the oil pressure switch when the following conditions are met. ― 1GR, 2GR or 3GR ― Revolution ratio of the input revolution to output revolution: 0.91—3.07 • The TCM detects input signal from the oil pressure switch when the following conditions are met. ― 4GR or 5GR ― Revolution ratio of the input revolution to output revolution: 0.64—0.81 Diagnostic support note • The MIL does not illuminate. • The AT warning light does not illuminate. • PENDING CODE is not available. • FREEZE FRAME DATA is not available. • The DTC is stored in the TCM memory.
POSSIBLE CAUSE	• Deteriorated ATF • ATF level low • Line pressure malfunction • Oil pressure switch connector or terminal malfunction • Short to GND in wiring harness between oil pressure switch terminal A and TCM terminal S • Oil pressure switch malfunction • TCM connector or terminal malfunction • Open circuit in wiring harness between oil pressure switch terminal A and TCM terminal S • TCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	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.
1		No	Go to the next step.
2	INSPECT ATF CONDITION • Inspect the ATF condition. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FS5A-EL].) • Is it normal?	Yes	Go to the next step.
2		No	Replace the ATF, then go to Step 10. (See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FS5A-EL])
3	INSPECT ATF LEVEL • Inspect the ATF level. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FS5A-EL].) • Is it normal?	Yes	Go to the next step.
3		No	Add ATF to the specified level, then go to Step 10. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FS5A-EL])
4	INSPECT LINE PRESSURE • Perform the “Line Pressures Test”. (See MECHANICAL SYSTEM TEST [FS5A-EL].) • Is there any malfunction?	Yes	Repair or replace malfunctioning part according to test result, then go to Step 10.
4		No	Go to the next step.
5	INSPECT OIL PRESSURE SWITCH CONNECTOR FOR POOR CONNECTION • Switch the ignition off. • Disconnect the oil pressure switch 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 10.
5		No	Go to the next step.
6	INSPECT OIL PRESSURE SWITCH CIRCUIT FOR SHORT TO GND • Switch the ignition off. • Inspect for continuity between oil pressure switch terminal A (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 10.
6		No	Go to the next step.
7	INSPECT OIL PRESSURE SWITCH • Inspect the oil pressure switch. (See OIL PRESSURE SWITCH INSPECTION [FS5A-EL].) • Is there any malfunction?	Yes	Replace the oil pressure switch, then go to Step 10. (See OIL PRESSURE SWITCH REMOVAL/INSTALLATION [FS5A-EL].)
7		No	Go to the next step.
8	INSPECT TCM CONNECTOR FOR POOR CONNECTION • Switch the ignition off. • Disconnect the TCM 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 10.
8		No	Go to the next step.
9	INSPECT OIL PRESSURE SWITCH CIRCUIT FOR OPEN CIRCUIT • Switch the ignition off. • Inspect for continuity between oil pressure switch terminal A (wiring harness-side) and TCM terminal S (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
9		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
10	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. Drive the vehicle in 1GR for 1 s or more. 2. Drive the vehicle in 2GR for 1 s or more. 3. Drive the vehicle in 3GR for 1 s or more. 4. Drive the vehicle in 4GR for 1 s or more. 5. Drive the vehicle in 5GR for 1 s or more. • Is the same DTC present?	Yes	Replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION [FS5A-EL].)
10		No	Go to the next step.
11	VERIFY NO DTCs ARE PRESENT • Perform the “Reading DTCs Procedure”. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FS5A-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FS5A-EL].)
11		No	DTC troubleshooting completed.