P0776

U760E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: P0776: Pressure Control Solenoid "B" Performance (Shift Solenoid Valve SL2)
P0776 - Pressure Control Solenoid "B" Performance (Shift Solenoid Valve SL2)

DESCRIPTION

The TCM uses the vehicle speed signal and signals from the transmission speed sensors (NC, NT) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear).

Then the TCM compares the actual gear with the shift schedule in the TCM memory to detect mechanical problems of the shift solenoid valves and valve body.





MONITOR DESCRIPTION

The TCM commands gear shifts by turning the shift solenoid valves on and off. According to the input shaft speed, intermediate (counter) shaft speed and output shaft speed, the TCM detects the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear). When the gear commanded by the TCM and the actual gear are not the same, the TCM illuminates the MIL and stores the DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

ALL





OFF malfunction





ON malfunction (A)





ON malfunction (B)





ON malfunction (C)





TYPICAL MALFUNCTION THRESHOLDS

OFF malfunction





ON malfunction (A), (B) or (C)

2 detections are necessary per driving cycle:

1st detection: temporary flag ON

2nd detection: pending fault code ON





INSPECTION PROCEDURE

NOTICE:
Perform the universal trip to clear permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

PROCEDURE

1. CHECK DTC OUTPUT (IN ADDITION TO DTC P0776)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / ECT / Trouble Codes.

(e) Read the DTCs using the Techstream.

Result





HINT
If shift solenoid valve SL2 is stuck off, DTCs for several shift solenoid valves including the malfunctioning shift solenoid valve will be stored.

B -- INSPECT SHIFT SOLENOID VALVE SL2
A -- Continue to next step.

2. PERFORM ACTIVE TEST USING TECHSTREAM (DRIVING TEST) P0746

E -- GO TO DTC P2714 P2714

D -- GO TO DTC P2808 P2808

C -- GO TO DTC P0796 P0796

B -- INSPECT SHIFT SOLENOID VALVE SL2

A -- GO TO DTC P0746 P0746

3. INSPECT SHIFT SOLENOID VALVE SL2

(a) Remove shift solenoid valve SL2.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





(c) Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

OK:





Text in Illustration





NG -- REPLACE SHIFT SOLENOID VALVE SL2 Disassembly
OK -- Continue to next step.

4. INSPECT TRANSMISSION VALVE BODY ASSEMBLY P0741

NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal

OK -- REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY Removal

5. INSPECT SHIFT SOLENOID VALVE SL2

(a) Remove shift solenoid valve SL2.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





(c) Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

OK:





Text in Illustration





NG -- REPLACE SHIFT SOLENOID VALVE SL2 Disassembly
OK -- Continue to next step.

6. INSPECT TRANSMISSION VALVE BODY ASSEMBLY P0741

NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal

OK -- REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY Removal