DTC P1702-9F: AT Solenoids Operation Shutdown Circuit Stuck Off [11/2021 - ]: Description

WARNING: This page is about a different car, the 2025 Lexus NX 350, 2024 Lexus NX 350, 2023 Lexus NX 350, and 2022 Lexus NX 350. However, it is still accessible from the selected car via links, so may be relevant.

The ECM detects a malfunction in the current cut circuit used to transition to a fail-safe gear position.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P1702-9F	AT Solenoids Operation Shutdown Circuit Stuck Off	Once 5 seconds elapse after the vehicle is parked and the ignition switch is turned off, any of the following conditions is continuously met for 0.1 seconds or more during a solenoid current cut request (1-trip detection logic). Solenoid (SL1) valve actual current value is 0.3 A or higher Solenoid (SL2) valve actual current value is 0.3 A or higher Solenoid (SL3) valve actual current value is 0.3 A or higher Solenoid (SL4) valve actual current value is 0.3 A or higher Solenoid (SL5) valve actual current value is 0.3 A or higher Solenoid (SL6) valve actual current value is 0.3 A or higher Solenoid (SLT) valve actual current value is 0.3 A or higher Solenoid (SLU) valve actual current value is 0.3 A or higher Solenoid (SL) valve is ON	Wire harness or connector ECM power source circuit Transmission revolution sensor (NT) Transmission revolution sensor (NC) Transmission wire Solenoid (SL1) valve Solenoid (SL2) valve Solenoid (SL3) valve Solenoid (SL4) valve Solenoid (SL5) valve Solenoid (SL6) valve Solenoid (SLT) valve Solenoid (SLU) valve Solenoid (SL) valve ECM	Does not come on	DTC stored	SAE Code: P1702

DTC DETECTION CONDITION PATTERNS:

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3	Pattern 4	Pattern 5
Diagnostic Condition	When a solenoid current cut request is sent after 5 seconds elapse after the vehicle is parked and the ignition switch is turned off	◦	◦	◦	◦	◦
Malfunction Condition	Solenoid (SL1) valve actual current value is 0.3 A or higher	◦	-	-	-	-
	Solenoid (SL2) valve actual current value is 0.3 A or higher	-	◦	-	-	-
	Solenoid (SL3) valve actual current value is 0.3 A or higher	-	-	◦	-	-
	Solenoid (SL4) valve actual current value is 0.3 A or higher	-	-	-	◦	-
	Solenoid (SL5) valve actual current value is 0.3 A or higher	-	-	-	-	◦
Duration		0.1 seconds or more	0.1 seconds or more	0.1 seconds or more	0.1 seconds or more	0.1 seconds or more
Detection Logic		1 trip detection logic	1 trip detection logic	1 trip detection logic	1 trip detection logic	1 trip detection logic

DTC DETECTION CONDITION PATTERNS:

		Vehicle Condition
		Pattern 6	Pattern 7	Pattern 8	Pattern 9
Diagnostic Condition	When a solenoid current cut request is sent after 5 seconds elapse after the vehicle is parked and the ignition switch is turned off	◦	◦	◦	◦
Malfunction Condition	Solenoid (SL6) valve actual current value is 0.3 A or higher	◦	-	-	-
	Solenoid (SLT) valve actual current value is 0.3 A or higher	-	◦	-	-
	Solenoid (SLU) valve actual current value is 0.3 A or higher	-	-	◦	-
	Solenoid (SL) valve is ON	-	-	-	◦
Duration		0.1 seconds or more	0.1 seconds or more	0.1 seconds or more	0.1 seconds or more
Detection Logic		1 trip detection logic	1 trip detection logic	1 trip detection logic	1 trip detection logic