P0976

A750E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: P0976, P0977: Shift Solenoid "B" Control Circuit Low (Shift Solenoid Valve S2)
P0977 - Shift Solenoid "B" Control Circuit High (Shift Solenoid Valve S2)

DESCRIPTION

Shifting from 1st to 5th is performed in combination with the ON and OFF operation of the shift solenoid valves SL1, SL2, S1, S2 and SR, which is controlled by the ECM. If an open or short circuit occurs in one of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated smoothly. In case of an open or short circuit, the ECM stops sending current to the circuit. For details, refer to the fail-safe chart Fail-Safe Chart.





MONITOR DESCRIPTION

These DTCs indicate an open or short in the shift solenoid valve S2 circuit. When there is an open or short circuit in any shift solenoid valve circuit, the ECM detects the problem, illuminates the MIL and stores the DTC. When the shift solenoid valve S2 is on, if its resistance is 8 Ohms or less, the ECM determines there is a short in the shift solenoid valve S2 circuit.

When the shift solenoid valve S2 is off, if its resistance is 100 kOhms or higher, the ECM determines there is an open in the shift solenoid valve S2 circuit Fail-Safe Chart.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All





P0976: Range Check (Low Resistance)





P0977: Range Check (High Resistance)





TYPICAL MALFUNCTION THRESHOLDS

P0976: Range Check (Low Resistance)





P0977: Range Check (High Resistance)





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

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

HINT
The shift solenoid valve S2 turns ON/OFF normally when the shift lever is in D.





PROCEDURE

1. INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE S2)

(a) Disconnect the B32 transmission wire connector.





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

Standard Resistance:





Text in Illustration





NG -- INSPECT SHIFT SOLENOID VALVE S2
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

(a) Disconnect the B36 ECM connector.





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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM Removal

3. INSPECT SHIFT SOLENOID VALVE S2 P0756

NG -- REPLACE SHIFT SOLENOID VALVE S2 Disassembly

OK -- REPAIR OR REPLACE TRANSMISSION WIRE Removal