Pre-collision System Circuit [08/2015 - ]: Procedure

NEXT: Go to next step 

1. Measure the battery voltage.

   Standard Voltage

   11 to 14 V

2. Using the parts location and system diagram, check the system for blown-out fuses, open or short circuits in the wire harness(es) and connectors that are not properly connected by performing a visual check.

   HINT: 

   If the voltage is 11 V or less, replace or recharge the battery before proceeding to the next step.

NEXT: Go to next step 

1. Check driving support ECU assembly.
   NOTE:

   As the connector may be damaged if a load of more than 10 kg (22 lb) is applied to it, do not apply any more load than necessary to the connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the I187 driving support ECU assembly connector.
3. Measure the resistance and voltage on the wire harness side connector according to the value(s) in the table below.
   NOTE:

   DTCs may be output when connectors are disconnected during inspection. Therefore, make sure to clear the DTCs using the Techstream once the inspection has been completed.

   Tester Connection	Condition	Specified Condition
   I187-25 (GND) - Body ground	Always	Below 1 Ω
   I187-30 (B) - Body ground	Engine switch on (IG)	11 to 14 V
   	Engine switch off	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Driving Support ECU Assembly)

4. Reconnect the I187 driving support ECU assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Adjust the reflector height. Refer to ADJUSTMENT [08/2015 - ] .
2. Place the reflector. Refer to ADJUSTMENT [08/2015 - ] .
3. Connect the Techstream to the DLC3.
4. Turn the Techstream on.
5. Operate the pre-collision system cancel switch assembly to turn the pre-collision system on.
6. Enter the following menus: Powertrain / Radar Cruise / Utility / Beam Axis Misalignment Reading.
7. Check the amount of misalignment and make a note.

   Result

   Result	Proceed to
   Beam axis is not misaligned	A
   Beam axis is misaligned	B

B → END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY ADJUSTMENT) 

A: Go to next step 

1. Use the Techstream to check if the CAN communication system is functioning normally. Refer to DIAGNOSIS SYSTEM [08/2015 - ] .

   OK

   CAN communication system DTCs are not output

NG → See step   10 

OK: Go to next step 

1. Check for DTCs and note any codes that are output.
2. Clear the DTCs.
3. Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions indicated by the DTCs.

NG → See step   11 

OK: Go to next step 

1. Using the Techstream, check the Data List. Refer to DATA LIST / ACTIVE TEST [08/2015 - ] .
2. Using the Techstream, perform the Active Test. Refer to DATA LIST / ACTIVE TEST [08/2015 - ] .

NEXT: Go to next step 

1. Check whether the vehicle control history (PCS operation history) matches the customer analysis. Refer to VEHICLE CONTROL HISTORY [08/2015 - ] .

   Result

   Result	Proceed to
   Vehicle control history matches the customer analysis	A
   Vehicle control history does not match customer analysis or there is no vehicle control history	B

B → See step   12 

A → See step   9