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Home >> Lexus >> 2017 >> RC 300 F Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 50 (Automatic Transmission System (8AR-FTS,Aa81E) - Diagnostic Codes (3 Of 3) & Circuit Tests) >> AUTOMATIC TRANSMISSION SYSTEM (for 8AR-FTS) >> DTC P2816-7F: Pressure Control Solenoid "H" Actuator Stuck Off [10/2015 - 11/2017] >> Description

DTC P2816-7F: Pressure Control Solenoid "H" Actuator Stuck Off [10/2015 - 11/2017]: Description

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Based on signals from the transmission revolution sensors (NT, SP2 and NC3), the actual gear is detected.

If the detected gear is different than the commanded gear, the ECM detects related mechanical problems in the shift solenoid valves, transmission valve body assembly and automatic transmission assembly (clutch, brake, gear, etc.).

HINT: 

ACTUAL GEAR WHEN A MALFUNCTION OCCURS IN SOLENOID (SL5) VALVE (WITHOUT FAIL-SAFE CONTROL):

ECM commanded gear 1st 2nd 3rd 4th 5th 6th 7th 8th
Actual gear during SL5 stuck ON malfunction 2nd 2nd 1st 4th 5th 6th N* 8th
Actual gear during SL5 stuck OFF malfunction 1st N (1st)* 3rd 4th 5th 6th 7th N*

*: Neutral

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P2816-7F Pressure Control Solenoid "H" Actuator Stuck Off 1. Diagnosis Condition, 2. Malfunction Status, 3. Malfunction Time, 4. Other

SL5 stuck ON malfunction: 

  1. Engine coolant temperature is 40°C (104°F) or more, ATF temperature is -10°C (14°F) or more, and the vehicle is driven with the shift lever in D (no malfunctions are detected in solenoid (SL1, SL2, SL3, SL4, SL5, SC1 and SC2) valves, transmission revolution sensors (NT, NC3, SP2), water temperature sensor, oil temperature sensor, knock control sensor, electronic throttle, or CAN2)
  2. One of following occurs:
    1. When the ECM commands the transmission to shift to 1st, the actual gear changes to 2nd gear.
    2. When the ECM commands the transmission to shift to 3rd or 7th, the engine overruns (neutral status).
  3. Malfunction status continues for 0.6 seconds or more
  4. 2-trip detection logic

SL5 stuck OFF malfunction: 

  1. Engine coolant temperature is 40°C (104°F) or more, ATF temperature is -10°C (14°F) or more, and the vehicle is driven with the shift lever in D (no malfunctions are detected in solenoid (SL1, SL2, SL3, SL4, SL5, SC1 and SC2) valves, transmission revolution sensors (NT, NC3, SP2), water temperature sensor, oil temperature sensor, knock control sensor, electronic throttle, or CAN2)
  2. When the ECM commands the transmission to shift to 2nd or 8th, the engine overruns (neutral status).
  3. Malfunction status continues for 0.5 seconds or more
  4. 2-trip detection logic
  • Solenoid (SC1) valve
  • Solenoid (SC2) valve
  • Solenoid (SL1) valve
  • Solenoid (SL2) valve
  • Solenoid (SL3) valve
  • Solenoid (SL4) valve
  • Solenoid (SL5) valve
  • Transmission valve body assembly
  • Torque converter assembly
  • Automatic transmission assembly (clutch, brake, gear, etc.)
 Comes on DTC stored SAE Code:
P2817
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