P0778
U760E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: P0778: Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2)
P0778 - Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2)
DESCRIPTION
Shifting from 1st to 6th is performed by the TCM turning shift solenoid valves SL1, SL2, SL3, SL4 and SL on and off. If an open or short circuit occurs in any of the shift solenoid valves, the TCM controls the remaining normal shift solenoid valves to allow the vehicle to be operated Fail-Safe Chart.
MONITOR DESCRIPTION
This DTC indicates an open or short in the shift solenoid valve SL2 circuit. The TCM commands gear shifts by turning the shift solenoid valves on or off. When there is an open or short circuit in any of the shift solenoid valve circuits, the TCM detects the problem, illuminates the MIL and stores the DTC. The TCM also performs the fail-safe function and turns the other normal shift solenoid valves on or off (in case of an open or short circuit, the TCM stops sending current to the circuit).
While driving and shifting gears, if the TCM detects an open or short in the shift solenoid valve SL2 circuit, the TCM determines there is a malfunction Fail-Safe Chart.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All
Condition (A)
Condition (B)
TYPICAL MALFUNCTION THRESHOLDS
Condition (A) and (B)
COMPONENT OPERATING RANGE
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
Perform the universal trip to clear permanent DTCs Reading and Clearing Diagnostic Trouble Codes.
HINT
The following table shows the normal operation of shift solenoid valve SL2 when the shift lever is in D:
PROCEDURE
1. INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL2)
(a) Remove the TCM.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- INSPECT SHIFT SOLENOID VALVE SL2
OK -- REPLACE TCM Removal
2. INSPECT SHIFT SOLENOID VALVE SL2 P0776
NG -- REPLACE SHIFT SOLENOID VALVE SL2 Disassembly
OK -- REPLACE TRANSMISSION WIRE Removal