DTC P0745-7F: Pressure Control Solenoid "A" Actuator Stuck Off [10/2017 - 09/2019]: Description

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The ECM detects the actual gear based on signals from the transmission revolution sensors (SP2, NC3 and NT).

Based on the detected gear and oil pressure switch output, the ECM detects related mechanical problems in the shift solenoid valves, transmission valve body assembly and automatic transmission assembly.

HINT:

ACTUAL GEAR WHEN A PROBLEM OCCURS IN SHIFT SOLENOID VALVE SL1:

ECM commanded gear	1st	2nd	3rd	4th	5th	6th	7th	8th
Actual gear during SL1 stuck ON malfunction	1st	2nd	3rd	4th	5th	6th	7th	8th
Actual gear during SL1 stuck OFF malfunction	N*	N*	N*	N*	N*	6th	7th	8th

*: Neutral

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P0745-7F	Pressure Control Solenoid "A" Actuator Stuck Off	All of the following conditions are met (2-trip detection logic): Engine coolant temperature is 40°C (104°F) or higher. ATF temperature is -10°C (14°F) or higher. The vehicle is driven with the shift lever in D. No malfunctions are detected in the shift solenoid valve SL1, SL2, SL3, SL4, SL5 and SR, transmission revolution sensors (NT, NC3 and SP2), oil pressure switch, engine coolant temperature sensor, ATF temperature sensor, knock control sensor, electronic throttle and CAN communication system. Either of the following conditions is met: The following is detected 2 times: When gear shifts to 6th, 7th or 8th are requested by the ECM, the oil pressure switch is ON. When gear shifts to 1st, 2nd, 3rd, 4th or 5th are requested by the ECM, the engine speed overruns (neutral status) for 0.5 seconds or more.	DTC Detection Condition 1, 2, 3, 4 and 5 (a): Shift solenoid valve SL1 Oil pressure switch Transmission valve body assembly Automatic transmission assembly DTC Detection Condition 1, 2, 3, 4 and 5 (b): Shift solenoid valve SL1 Shift solenoid valve SLT Transmission valve body assembly Automatic transmission assembly	Comes on	DTC stored	SAE Code: P0746

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P0745-7F

Pressure Control Solenoid "A" Actuator Stuck Off

All of the following conditions are met (2-trip detection logic):

Engine coolant temperature is 40°C (104°F) or higher.
ATF temperature is -10°C (14°F) or higher.
The vehicle is driven with the shift lever in D.
No malfunctions are detected in the shift solenoid valve SL1, SL2, SL3, SL4, SL5 and SR, transmission revolution sensors (NT, NC3 and SP2), oil pressure switch, engine coolant temperature sensor, ATF temperature sensor, knock control sensor, electronic throttle and CAN communication system.
Either of the following conditions is met:
1. The following is detected 2 times:
  When gear shifts to 6th, 7th or 8th are requested by the ECM, the oil pressure switch is ON.
2. When gear shifts to 1st, 2nd, 3rd, 4th or 5th are requested by the ECM, the engine speed overruns (neutral status) for 0.5 seconds or more.

DTC Detection Condition 1, 2, 3, 4 and 5 (a):

Shift solenoid valve SL1
Oil pressure switch
Transmission valve body assembly
Automatic transmission assembly

DTC Detection Condition 1, 2, 3, 4 and 5 (b):

Shift solenoid valve SL1
Shift solenoid valve SLT
Transmission valve body assembly
Automatic transmission assembly

Comes on

DTC stored

SAE Code: P0746

DTC DETECTION CONDITION PATTERNS:

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3	Pattern 4
Diagnostic Condition	Engine coolant temperature is 40°C (104°F) or higher.	◦	◦	◦	◦
	ATF temperature is -10°C (14°F) or more.	◦	◦	◦	◦
	The vehicle is driven with the shift lever in D.	◦	◦	◦	◦
	No malfunctions are detected in the shift solenoid valve SL1, SL2, SL3, SL4, SL5 and SR, transmission revolution sensors (NT, NC3 and SP2), oil pressure switch, engine coolant temperature sensor, ATF temperature sensor, knock control sensor, electronic throttle and CAN communication system.	◦	◦	◦	◦
Malfunction Condition	When gear shifts to 6th are requested by the ECM, the oil pressure switch is ON	◦	-	-	-
	When gear shifts to 7th are requested by the ECM, the oil pressure switch is ON	-	◦	-	-
	When gear shifts to 8th are requested by the ECM, the oil pressure switch is ON	-	-	◦	-
	When gear shifts to 1st are requested by the ECM, the engine speed overruns (neutral status).	-	-	-	◦
Duration		2 times	2 times	2 times	0.5 seconds or more
Detection Logic		2-trip detection logic	2-trip detection logic	2-trip detection logic	2-trip detection logic

DTC DETECTION CONDITION PATTERNS:

		Vehicle Condition
		Pattern 5	Pattern 6	Pattern 7	Pattern 8
Diagnostic Condition	Engine coolant temperature is 40°C (104°F) or higher.	◦	◦	◦	◦
	ATF temperature is -10°C (14°F) or more.	◦	◦	◦	◦
	The vehicle is driven with the shift lever in D.	◦	◦	◦	◦
	No malfunctions are detected in the shift solenoid valve SL1, SL2, SL3, SL4, SL5 and SR, transmission revolution sensors (NT, NC3 and SP2), oil pressure switch, engine coolant temperature sensor, ATF temperature sensor, knock control sensor, electronic throttle and CAN communication system.	◦	◦	◦	◦
Malfunction Condition	When gear shifts to 2nd are requested by the ECM, the engine speed overruns (neutral status).	◦	-	-	-
	When gear shifts to 3rd are requested by the ECM, the engine speed overruns (neutral status).	-	◦	-	-
	When gear shifts to 4th are requested by the ECM, the engine speed overruns (neutral status).	-	-	◦	-
	When gear shifts to 5th are requested by the ECM, the engine speed overruns (neutral status).	-	-	-	◦
Duration		0.5 seconds or more	0.5 seconds or more	0.5 seconds or more	0.5 seconds or more
Detection Logic		2-trip detection logic	2-trip detection logic	2-trip detection logic	2-trip detection logic

HINT:

This DTC is stored when any of the above detection patterns are met.