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DTC P0876: Malfunction of high clutch oil pressure switch
 
 
 
 
DIAGNOSTIC FUNCTION
The TCM checks whether the high clutch oil pressure switch turns ON and OFF normally depending on the hydraulic pressure applied to the high clutch.
 
 
DESCRIPTIONS OF MONITOR METHODS
  • The TCM determines that a malfunction exists if the high clutch oil pressure switch does not turn OFF when the command pressure to the high clutch is 0 MPa (0 psi) or less, or does not turn ON when the command pressure is 0.2 MPa (29 psi) or more for a certain period.
 
 
MONITOR EXECUTION (STUCK ON)
  • The target pressure for the high clutch and reverse brake solenoid valve is 0 MPa (0 psi) or less.
  • Target auxiliary gear position: 1st
  • Engine speed: 450 r/min or more
 
 
MONITOR EXECUTION (STUCK OFF)
  • The target pressure for the high clutch and reverse brake solenoid valve is 0.2 MPa (29 psi) or more.
  • Target auxiliary gear position: 2nd
  • Transmission range: "D" or "L"
  • Accelerator pedal opening angle: 7.8 percent or more
  • Engine speed: 450 r/min or more
  • Output shaft speed: 300 r/min or more
  • Secondary pulley speed: 300 r/min or more
 
 
MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
  • P0705: Malfunction of the transmission range switch
  • P0711, P0712, P0713: Malfunction of transmission fluid temperature sensor
  • P0715: Malfunction of primary pulley speed sensor
  • P0720: Malfunction of the output speed sensor
  • P0746: Abnormality in hydraulic control system
  • P0791: Malfunction of the secondary pulley speed sensor
  • P0962, P0963: Malfunction of the line pressure solenoid valve
  • P0973, P0974: Malfunction of the low brake solenoid valve
  • P0976, P0977: Malfunction of the high clutch and reverse brake solenoid valve
  • P2857: 1st gear neutral malfunction
  • P2858: 2nd gear neutral malfunction
  • P2859: 1st gear ratio malfunction
  • P285A: 2nd gear ratio malfunction
  • U0001: Malfunction of CAN communication
  • U0100: CAN time-out error (engine)
Sensor (The sensor below is determined to be normal)
  • Transmission range switch
  • Primary pulley speed sensor
  • Output speed sensor
  • Secondary pulley speed sensor
  • Line pressure solenoid valve
  • Low brake solenoid valve
  • High clutch and reverse brake solenoid valve
 
 
LOGIC FLOW CHARTS (Monitor Sequence - Stuck ON)
 
 
DTC SET CONDITIONS (Stuck ON)
Check Conditions
  • The target pressure for the high clutch and reverse brake solenoid valve is 0 MPa (0psi) or less.
  • Target auxiliary gear position: 1st
  • Engine speed: 450 r/min or more
Judgment Criteria
  • The high clutch oil pressure switch is ON for 1.5 seconds.
 
 
LOGIC FLOW CHARTS (Monitor Sequence - Stuck OFF)
 
 
DTC SET CONDITIONS (Stuck OFF)
Check Conditions
  • The target pressure for the high clutch and reverse brake solenoid valve is 0.2 MPa (29 psi) or more.
  • Target auxiliary gear position: 2nd
  • Transmission range: "D" or "L"
  • Accelerator pedal opening angle: 7.8 percent or more
  • Engine speed: 450 r/min or more
  • Secondary pulley speed: 300 r/min or more
  • Output speed: 300 r/min or more
Judgment Criteria
  • The high clutch oil pressure switch remains off for a certain period. The period depends on transmission fluid temperature. For example, 2.5 seconds at 40°C (104°F) or more, and 10.2 seconds at -20°C (-4°F) or less.
 
 
OBD-II DRIVE CYCLE PATTERN
Wait for at least 5 seconds after the engine is started. Then accelerate to 70 km/h (43.5 mph) slowly with the accelerator opening angle at 10 percent or more.
 
 
PROBABLE CAUSES
  • Malfunction of the valve body assembly (Defective high clutch oil pressure switch)
  • Damaged wiring harness and connectors
  • Malfunction of TCM
 
 
DIAGNOSIS
STEP 1. Check the following connector.
  • CVT assembly connector
  • TCM connector
Check the terminals for a contact status problem and internal short circuit.
Is the check result normal?
Go to Step 2.
Repair the defective connector.
 
STEP 2. Check for open circuit or short to ground in ROM3 line between the CVT assembly connector and the TCM connector.
Is the check result normal?
Go to Step 3.
Repair the wiring harness.
 
STEP 3. Check for short to other harness in ROM3 line between the CVT assembly connector and the TCM connector.
Is the check result normal?
Go to Step 4.
Repair the wiring harness.
 
STEP 4. Scan tool (M.U.T.-III) data list.
Item 73: Oil pressure switch (Refer to Data List Reference Table .)
Is the check result normal?
Go to Step 5.
Replace the valve body assembly (Refer to ).
 
STEP 5. Symptom recheck after erasing DTC.
Is the DTC stored?
Replace the TCM (Refer to ).
Intermittent malfunction (Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).