Pre-collision System Switch Circuit [10/2014 - 09/2017]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Pre-Collision 2 / Data List.
5. Read the Data List according to the display on the Techstream.

   Body Electrical > Pre-Collision 2 > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   PCS OFF Switch	Pre-collision system switch status	ON or OFF	ON: Pre-collision system function disabled due to switch operation OFF: Pre-collision system function enabled due to switch operation	-

   Body Electrical > Pre-Collision 2 > Data List 

   Tester Display
   PCS OFF Switch

   OK

   When the pre-collision system switch is operated, the display changes as shown above.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2014 - 09/2017] 

Result: 

NG 

See step  2

1. Remove the No. 2 combination switch assembly (pre-collision system switch).

   Refer to REMOVAL [10/2014 - ]

2. Inspect the No. 2 combination switch assembly (pre-collision system switch).

   Refer to INSPECTION [10/2014 - 09/2017]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE NO. 2 COMBINATION SWITCH ASSEMBLY (PRE-COLLISION SYSTEM SWITCH). Refer to  REMOVAL [10/2014 - ] 

Result: 

OK 

See step  3

1. Disconnect the I37 No. 2 combination switch assembly (pre-collision system switch) connector.
2. Disconnect the I19 driving support ECU assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I37-4 (ECU) - I19-5 (PBSW)	Always	Below 1 Ω
   I37-4 (ECU) - Body ground	Always	10 kΩ or higher
   I37-16 (GND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to  REMOVAL [10/2014 - 09/2017] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR