Distance Control Switch Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Radar Cruise / Data List.
5. Check the Data List to confirm function of the distance control switch.
   RADAR CRUISE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Distance Control Switch	Distance control switch signal / ON or OFF	ON: Distance control switch on OFF: Distance control switch off	-

   OK

   The display changes in accordance with switch operation.

NG → See step   2 

OK → See step   7 

1. Remove the steering pad switch RH. Refer to REMOVAL .
   Fig 1: Inspecting Steering Pad Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Distance Control Switch	-	-
   *a	Component without harness connected (Steering Pad Switch RH)	-	-

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   z9-4 - z9-6	Distance control switch ON	Below 2.5 Ω
   z9-4 - z9-6	Distance control switch OFF	1 MΩ or higher

3. Install the steering pad switch RH. Refer to INSTALLATION .

NG → See step   8 

OK: Go to next step 

1. Remove the spiral with sensor cable sub-assembly. Refer to REMOVAL .
   Fig 2: Inspecting Spiral With Sensor Cable Sub-Assembly

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

   Standard Resistance (Check for Open)

   Tester Connection	Spiral Cable Sub-assembly Position	Specified Condition
   z9-4 - L52-11 (DIST)	Center	Below 3 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   z9-6 - L52-2 (ECC)	Center	Below 3 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   z9-4 - L52-11 (DIST)	Always	Below 3 Ω
   z9-6 - L52-2 (ECC)	Always	Below 3 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Spiral with Sensor Cable Sub-assembly)

   HINT: 

   The spiral with sensor cable sub-assembly makes a maximum of approximately 5 rotations.

3. Reinstall the spiral with sensor cable sub-assembly. Refer to INSTALLATION .

NG → See step   6 

OK: Go to next step 

1. Disconnect the driving support ECU assembly connector.
2. Disconnect the spiral with sensor cable sub-assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   L151-6 (SPSW) - L52-11 (DIST)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   L151-6 (SPSW) or L52-11 (DIST) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVING SUPPORT ECU - SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY) 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 3: Checking L52 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   L52-2 (ECC) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Spiral with Sensor Cable Sub-assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - BODY GROUND) 

OK → See step   9