Expand All

DTC P2757/33 CONTROL VALVE 3 SYSTEM

FUNCTION EXPLANATION

Eight pressure switches are installed in the valve body. The oil passages in the valve body are switched according to the operation status of each solenoid, each shift valve, and each control valve etc., and the pressure switches are switched ON or OFF. Pressure switch 1 operates according to the status of solenoid SL1 and control valve No. 1, pressure switch 2 operates according to the status of solenoid SL2 and control valve No. 2, and pressure switch 7 operates according to the status of solenoid SL3 and control valve No. 3. The transmission control computer ASSY puts out diagnostic codes when trouble occurs in this PSW1 signal system, PSW2 signal system, PSW7 signal system or in the solenoid or control valve system.

Detection condition 1

DTC No.
  1. Diagnosis conditions
  2. Trouble status
  3. Trouble length
Inspection part
P0746/31
  1. Engine rotating in D, 4, or L-3 range
  2. Hydraulic pressure switch 1 does not become OFF during output of C1 clutch, C2 clutch, and B1 brake inactive signal.
  3. 0.3 seconds or more
  • Wire harness and connector (PSW1 signal system)
  • Automatic transmission ASSY (PSW1)
  • Transmission solenoid ASSY (SL1)
  • Transmission control computer ASSY
P0776/32
  1. Engine rotating in D, 4, or L-3 range
  2. Hydraulic pressure switch 2 does not become OFF during output of C3 clutch and B2 brake inactive signal.
  3. 0.3 seconds or more
  • Wire harness and connector (PSW2 signal system)
  • Automatic transmission ASSY (PSW2)
  • Transmission solenoid ASSY (SL2)
  • Transmission control computer ASSY
P2757/33
  1. Shifting from N to D or N to R during engine rotation
  2. Pressure switch 7 does not become ON at the time of shifting from N to D or N to R.
  3. 0.3 seconds or more
  • Wire harness and connector (PSW7 signal system)
  • Automatic transmission ASSY (PSW7)
  • Transmission solenoid ASSY (SL3)
  • Transmission control computer ASSY

Detection condition 2

DTC No.
  1. Diagnosis conditions
  2. Trouble status
  3. Trouble length
Inspection part
P0746/31
  1. Engine rotating in D, 4, or L-3 range
  2. Hydraulic pressure switch 1 does not become ON during output of C1 clutch, C2 clutch, and B1 brake operation signal.
  3. Three times in a row
  • Wire harness and connector (PSW1 signal system)
  • Automatic transmission ASSY (PSW1)
  • Transmission solenoid ASSY (SL1)
  • Transmission control computer ASSY
P0776/32
  1. Engine rotating in D, 4, or L-3 range
  2. Hydraulic pressure switch 1 does not become ON during output of C3 clutch and B3 brake operation signal.
  3. Three times in a row
  • Wire harness and connector (PSW2 signal system)
  • Automatic transmission ASSY (PSW2)
  • Transmission solenoid ASSY (SL2)
  • Transmission control computer ASSY
P2757/33
  1. Engine rotating in D, 4, or L-3 range
  2. Hydraulic pressure switch 1 does not become ON during output of C1 clutch and C3 clutch operation signal.
  3. 0.15 seconds or more
  • Wire harness and connector (PSW7 signal system)
  • Automatic transmission ASSY (PSW7)
  • Transmission solenoid ASSY (SL3)
  • Transmission control computer ASSY

CIRCUIT DIAGRAM

INSPECTION PROCEDURE

1. CONFIRM DIAGNOSTIC CODE

Detail

2. INSPECT TRANSMISSION CONTROL COMPUTER ASSY BY ITSELF (INSPECT VOLTAGE)

Detail

3. INSPECT WIRE HARNESS AND CONNECTOR (TRANSMISSION CONTROL COMPUTER ASSY - TRANSMISSION WIRE)

Detail

4. INSPECT TRANSMISSION WIRE BY ITSELF (PSW1, PSW2, PSW7)

Detail

DTC Clear

Detail