DTC C15A5-65: Lock Mechanism Circuit [04/2013 - 10/2016]: Procedure

1. Turn the engine switch on (IG).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (VGRS ECU [Front Steering Control ECU])

2. Measure the voltage according to the value(s) in the table below.

   HINT: 

   With the connector connected to the VGRS ECU (front steering control ECU), measure the voltage from the rear of the connector.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   K18-2 (LV) - Body ground	Engine switch on (IG)	11 to 14 V
   K18-6 (LG) - Body ground	Engine switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  3

Result: 

OK 

See step  2

1. Turn the engine switch off.
2. Connect the Techstream to the DLC3.
3. Start the engine.
4. Turn the Techstream on.
5. Enter the following menus: Chassis / VGRS / Data List.

   Chassis > VGRS > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Lock Solenoid Voltage	Lock solenoid voltage	Min.: 0.00 V Max.: 255.99 V	0 to 14 V	-

   Chassis > VGRS > Data List 

   Tester Display
   Lock Solenoid Voltage

   OK

   0 to 14 V (while the engine is being started)

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 06/2014]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2014 - 08/2015]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 10/2016] 

Result: 

NG 

REPLACE VGRS ECU (FRONT STEERING CONTROL ECU). Refer to  REMOVAL [04/2013 - 10/2016] 

1. Turn the engine switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to VGRS ECU [Front Steering Control ECU])

2. Disconnect the K18 VGRS ECU (front steering control ECU) connector.
3. Measure the resistance according to the value(s) in the table below.

   HINT: 

   Measure the resistance of the steering actuator assembly at the connector of the VGRS ECU (front steering control ECU).

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K18-2 (LV) - K18-6 (LG)	Always	10 to 30 Ω
   K18-2 (LV) - Body ground	Always	100 kΩ or higher
   K18-6 (LG) - Body ground	Always	100 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE VGRS ECU (FRONT STEERING CONTROL ECU). Refer to  REMOVAL [04/2013 - 10/2016] 

Result: 

NG 

See step  4

1. Turn the engine switch off.
2. Disconnect the K18 VGRS ECU (front steering control ECU) connector.
3. Disconnect the K15 steering actuator assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K18-2 (LV) - K15-7 (LV+)	Always	Below 1 Ω
   K18-6 (LG) - K15-16 (LG+)	Always	Below 1 Ω
   K18-2 (LV) - K18-6 (LG)	Always	10 to 30 Ω
   K18-2 (LV) or K15-7 (LV+) - Body ground	Always	100 kΩ or higher
   K18-6 (LG) or K15-16 (LG+) - Body ground	Always	100 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE STEERING ACTUATOR ASSEMBLY. Refer to  REMOVAL [04/2013 - 10/2016] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR