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2017 TOYOTA HIGHLANDER
2.7L I4•FWD•AUTOMATIC•gas•1AR-FE
4 active safety recalls on this vehicle — view recalls
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Repairs0Labor477Torque4154Fluid10DTC1940Battery1Maintenance0Recalls4
P0953moderate severityPowertrain

Auto Shift Manual Control Circuit High

on 2017 Toyota Highlander 2.7L I4 · FWD

What this code means

The automatic shift manual control circuit is reading a higher than expected voltage signal. This usually indicates a short to voltage or an open circuit in the shift control wiring.

Symptoms

  • Manual shifting inoperative
  • Unexpected gear behavior
  • Transmission warning light on

Common causes

  • Short to voltage in shift wiring
  • Open circuit in shift control line
  • Faulty shift selector switch
  • Failed transmission control module

Diagnostic steps

  1. Scan for related fault codes
  2. Measure signal voltage at the circuit
  3. Check wiring for shorts to power or opens
  4. Verify switch and TCM operation
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