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DTC P0985/65 HYDRAULIC PRESSURE SOLENOID SYSTEM (LOW)

FUNCTION EXPLANATION

The S4 solenoid controls the pressure switching valve by signals from the transmission control computer ASSY, and it switches the output pressure from control valve No. 1 and control valve No. 2 to the line pressure. This line pressure operates clutch and brake. In case of a wire break or short-circuit in the S4 solenoid system, the transmission control computer ASSY puts out a diagnostic code.

DTC No.
  1. Diagnosis conditions
  2. Trouble status
  3. Trouble length
Inspection part
P0985/65
  1. None
  2. S4 solenoid current: 4 A or more
  3. Continuously for 0.1 second or longer
  • Wire harness and connector (S4 signal system)
  • Transmission solenoid ASSY (S4)
  • Transmission control computer ASSY
P0986/65
  1. None
  2. SL4 solenoid resistance: 100 kΩ or more
  3. Continuously for 0.1 second or longer
  • Wire harness and connector (S4 signal system)
  • Transmission solenoid ASSY (S4)
  • Transmission control computer ASSY

CIRCUIT DIAGRAM

INSPECTION PROCEDURE

1. INSPECT TRANSMISSION WIRE BY ITSELF (S4)

Detail

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

Detail

3. INSPECT TRANSMISSION SOLENOID ASSY (S4) BY ITSELF

Detail

DTC Clear

Detail