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Toyota Corolla Repair Manual: Shift solenoid a control circuit low/high

Dtc p0973 shift solenoid a control circuit low (shift solenoid valve s1)

Dtc p0974 shift solenoid a control circuit high (shift solenoid valve s1)

Inspection procedure
1 Inspect shift solenoid valve(s2) Remove the shift solenoid valve s2.  measure the resistance according to the value(s) in the table below. Standard: Connect the positive (+ ...

Circuit description
Shifting from 1st to o/d is performed in combination with on and off of the shift solenoid valve s1 and s2 controlled by ecm. If an open or short circuit occurs in either of the solenoid valves, ...

Other materials:

Inspection procedure
1 Reconfirm dtc Check the dtc 2 Inspect skid control ecu connector securely connected 3 Inspect skid control ecu connector(ig1 terminal voltage) In case of using handheld tester:  check the voltage condition output from the ecu displayed on the handheld tester. Ok: ...

Inspection procedure
Hint: if different dtcs related to different systems that have terminal e2 as the ground terminal are output simultaneously, terminal e2 may be open. Read freeze frame data using the hand-held tester or the obd ii scan tool. Freeze frame data records the engine conditions when a malf ...

Inspection procedure
Hint: read freeze frame data using the hand-held tester or the obd ii scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the ...

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