Steering Lock Motor Drive Power Circuit: Procedure

1. Check the problem symptom of the steering lock system.

   Result

   Condition	Proceed to
   Steering lock cannot be released	A
   Steering cannot be locked	B

B → See step   5 

A: Go to next step 

1. Measure the voltage according to the value(s) in the table below.
   Fig 1: Identifying Steering Lock Actuator Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Voltage

   Tester Connection (Symbols)	Condition	Specified Condition
   D14-3 (IGE) - D14-2 (SGND)	Engine switch off Turn the engine switch on (ACC or IG)	Motor active: Below 1 V Motor not active: 10 to 12 V

OK → PROCEED TO  PROBLEM SYMPTOMS TABLE  NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

NG: Go to next step 

1. Disconnect the D14 connector from the steering lock actuator assembly.
   Fig 2: Identifying D14 Steering Lock Actuator Assembly (Body Ground) Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Resistance

   Tester Connection (Symbols)	Condition	Specified Condition
   D14-2 (SGND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the D44 connector from the power source control ECU.
   Fig 3: Identifying Steering Lock Actuator Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   Fig 4: Identifying D44 Power Source Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Resistance

   Tester Connection (Symbols)	Condition	Specified Condition
   D14-3 (IGE) - D44-32 (SLR+)	Always	Below 1 Ω
   D14-3 (IGE) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE POWER SOURCE CONTROL ECU 

1. Measure the voltage according to the value(s) in the table below.
   Fig 5: Identifying D14 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Voltage

   Tester Connection (Symbols)	Condition	Specified Condition
   D14-3 (IGE) - D14-2 (SGND)	Adjust the shift lever to the P position Turn the engine switch off Open the driver side door	Motor active: Below 1 V Motor not active: 10 to 12 V

OK → PROCEED TO  PROBLEM SYMPTOMS TABLE  NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

NG: Go to next step 

1. Disconnect the D14 connector from the steering lock actuator assembly.
   Fig 6: Identifying D14 Steering Lock Actuator Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Resistance

   Tester Connection (Symbols)	Condition	Specified Condition
   D14-2 (SGND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the D44 connector from the power source control ECU.
   Fig 7: Identifying D14 Steering Lock Actuator Assembly Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   Fig 8: Identifying D44 Power Source Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Resistance

   Tester Connection (Symbols)	Condition	Specified Condition
   D14-3 (IGE) - D44-32 (SLR+)	Always	Below 1 Ω
   D14-3 (IGE) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE POWER SOURCE CONTROL ECU