TECHNICAL INSTRUCTIONS
FOR

SPECIAL SERVICE CAMPAIGN JLH

INTELLIGENT CLEARANCE SONAR (ICS) SYSTEM REPROGRAM

CERTAIN:
2018 LS 500 and LS 500h
2018 NX 300 and NX 300h
2018 RX 350L and RX 450hL
2017-2018 RX 350 and RX 450h

The repair quality of covered vehicles is extremely important to Lexus. All dealership technicians performing
this recall are required to successfully complete the most current version of the E-Learning course “Safety
Recall and Service Campaign Essentials”. To ensure that all vehicles have the repair performed correctly;
technicians performing this recall repair are required to currently hold at least one of the following certification
levels:

• Certified
• Senior
• Master
It is the dealership’s responsibility to select technicians with the above certification level or greater to
perform this recall repair. Carefully review your resources, the technician skill level, and ability before
assigning technicians to this repair. It is important to consider technician days off and vacation
schedules to ensure there are properly trained technicians available to perform this repair at all times.

I.

OPERATION FLOW CHART
Check the TIS Vehicle Inquiry System
to verify vehicle eligibility.

Not Covered

No further action required.

Covered

Is a Calibration ID update required to
the Advanced Parking Guidance/ICS/
Intuitive P/A System

NO

YES
Record customized settings; Prepare
the vehicle for calibration ID update

Update the Advanced Parking
Guidance/ICS/Intuitive P/A
System Calibration ID

Perform Verification Heath Check

Restore customized settings;
Complete repair

Campaign complete.
Return the vehicle to the customer.

II. IDENTIFICATION OF AFFECTED VEHICLES
•
•

Check the TIS Vehicle Inquiry System to confirm the VIN is involved in this Campaign, and
that it has not already been completed prior to dealer shipment or by another dealer.
TMS warranty will not reimburse dealers for repairs completed on vehicles that are not
affected or were completed by another dealer.

III. PREPARATION
1. TOOLS, SUPPLIES & EQUIPMENT
•
•
•
•

Standard Hand Tools
Techstream 2.0 / TIS Techstream / Techstream Lite
GR8 Battery Diagnostic Station
L-SB-0001-18

2

IV. BACKGROUND
The involved vehicles are equipped with Intelligent Clearance Sonar (ICS). When an involved
vehicle enters a conveyor-type carwash and is placed into neutral, due to a programming error in
the ICS system, the front sonar sensors in the system may incorrectly interpret the carwash
brushes as a pedestrian or vehicle, and activate the ICS system. If the ICS system activates, the
ICS system will exhibit warnings and the system may apply the brakes.

V. DETERMINE STATUS OF CURRENT CALIBRATION
1. CHECK FOR DTC’S
a. Using a Techstream, perform a Health Check to check for
any Diagnostic Trouble Codes.
Note: This Campaign covers only the Calibration ID update to
the Advanced Parking Guidance/ICS/Intuitive P/A System, as
detailed in these instructions. It does not cover the diagnosis or
replacement of any other systems on the vehicle.

2. CHECK CURRENT CALIBRATION
a. Locate the Update column for the ADVANCED PARKING GUIDANCE/ICS/INTUITIVE P/A
System in the Stored Data tab for this vehicle.
b. Determine the status of an available update; indicated by a YES or NO.

YES

Is there an update available to the
Advanced Parking Guidance/ICS/
Intuitive P/A System?

Proceed to Section VI. Vehicle
Preperation on p. 4

No

Campaign complete. Return the
vehicle to the customer.
3

VI. VEHICLE PREPERATION
1. DISCONNECT COOLING FAN
a. Disconnect the electrical connector from the cooling fan
ECU on the radiator shroud.
Note: If the cooling fans run during the Calibration update
procedure, the battery voltage will be inconsistent and could
cause damage the control module.
RX 350 shown. Other models are similar.

2. PRESSURIZE HYDRO-BOOSTER (LS 500, all hybrid models)
a. Depress the brake pedal fully 2 times within 2 seconds.
b. Release the brake pedal.
c. Wait 10 seconds.
Note: The hydro-boost pump may run for a few seconds when completing these steps. The
procedure will pressurize the system and prevent the pump from running during the
Calibration update procedure. Not all vehicles are equipped with the Hydro-booster.

3. VEHICLE PREPARATION
a. Confirm the following conditions:
• Vehicle in the IG position (engine off).
• Transaxle in Park.
• Parking brake engaged.
• Turn off all electrical accessories (i.e. climate control, audio system, etc.)
• Headlight switch in the DRL OFF position.
• Windshield wiper switch in the OFF position.
4. CONNECT THE 12v BATTERY TO A POWER SUPPLY (GR8)
a. Connect the GR8 or other type of a power supply (not a battery charger) to the 12v battery.
b. Select the Power Supply Mode from the Charge Menu of the GR8.
A power supply MUST be used during reprogramming. ECU
damage will occur if the battery voltage is not properly
maintained during this re-flash procedure.
Note: A power supply must be connected directly to the 12v battery terminals and NOT the
remote jump posts under the hood (if equipped).

5. VERIFY TECHSTREAM SETUP
a. Verify that the Techstream meets the following conditions:
• The latest version of software is loaded.
• The Techstream battery is fully charged. If not, connect the Techstream to a 120v
source.
• The DLCIII cable is in good condition.
The Techstream’s battery voltage must be maintained during the
update procedure. If necessary, plug the Techstream into a 120v
outlet during this procedure.
Note: If the Techstream’s communication with the vehicle fails during the update
procedure, the Clearance Warning ECU will be damaged.

4

6. RECORD CUSTOMIZED SETTINGS
The customized setting for this System will be lost during the Calibration update. It will be
necessary to record the customers settings, prior to the update, to return the vehicle to its
original condition.
a. Use a Techstream to access the following data:
• Advance Parking Guidance/ICS/Intuitive P/A → Customize → Warning, Sensor,
Display, and Others.
b. Record the Customized Settings on the sheets provided in Section: X APPENDIX on p. 10.
STEP A (LS500 & LS500h)
STEP B (RX350 & RX450h & RX350L & RX450hL)
STEP C (NX300 & NX300h)

VII. UPDATE CALIBRATION
1. UPDATE THE ADVANCED PARKING GUIDANCE/ICS/INTUITIVE P/A SYSTEM
a. Identify the vehicles Original CID for the Advanced Parking Guidance/ICS/Intuitive P/A System
on the Stored Data tab.

Original CID

b. Locate the vehicles Original CID in the chart on the following page.
c. Select the corresponding NEW CID link to load the update.
d. Follow the on-screen instructions to complete the Calibration Update procedure.
The CID Update Procedure is detailed in L-SB-0001-18 Please reference this Bulletin for more
detailed procedures and information.

5

Be extremely careful to select the correct NEW CID that
corresponds to the Original CID.
Clearance Warning ECU Calibrations

Vehicle Specification
Model

MY

Current CID

New CID

LS500 & LS500h

18

8934F500904

8934F500906

8934F481700

8934F482900
8934F481701
RX350 & RX450h

17 - 18

8934F481800

8934F483000
8934F481801

RX350L & RX450hL

8934F482201

8934F483100

8934F482301

8934F483200

8934F780302

8934F780303

8934F780402

8934F780403

8934F780502

8934F780503

17 - 18

NX300 & NX300h

18

Note: If the Advance Parking Guidance/ICS/Intuitive P/A system has already been calibrated
with the new CID, the campaign is complete.

VIII.

COMPLETE REPAIR
1. PERFORM VERIFICATION HEALTH CHECK
a. Using a Techstream, perform a Health Check.
b. Clear DTC’s that may have set during the re-flash
procedure.
c. Re-run the Health Check to confirm that no DTC’s
reappear.
THIS VERIFICATION HEALTH CHECK IS
NECESSARY to update the results and CID’s
to the National database.

6

2. CONFIRM CID UPDATE
a. On the Stored Data tab, confirm the following for the Advanced Parking
Guidance/ICS/Intuitive P/A ECU:
•

The Update column lists “No”

MUST say

“No”

Note: If you receive the following message after the Verification Health Check, you have not properly
completed the Required Calibration Updates!!

7

3. PRINT CUSTOMER HEALTH CHECK REPORT
a. From the Stored Data tab, select the Customer Health Check Report button (TIS will launch
when button is pressed).

Customer Health
Check Button

b.
c.
d.
e.

Log in to TIS.
Input Vehicle Mileage and Repair Order number.
Check the “Performed” campaign button for campaign JLH.
Select the Report button.

f. Confirm Customer Health Check Report information is correct.
g. Print Customer Health Check Report from TIS.
h. Sign and provide to the customer.

IX. REASSEMBLY
1. RESTORE CUSTOMIZED SETTINGS
a. Use a Techstream to access the following data:
• Advance Parking Guidance/ICS/Intuitive P/A → Customize → Warning, Sensor,
Display, and Others.
b. Restore the customized settings to their prior selections using the Customized Settings Sheets
that you previously recorded.
2. CONNECT COOLING FAN
a. Lower the lock lever and engage the claw to connect the cooling fan motor connector.

8

3. INITIALIZE PKSB OR ICS SYSTEM
a. If the PKSB indicator (LS models) or ICS indicator (RX & NX models) blinks after reflash,
perform steering sensor zero point calibration.
LS 500

2018

LS 500h

2018

RX 350

2017

2018

RX 450h

2017

2018

RX 350L

2018

RX 450hL

2018

NX 300

2018

NX 300h

2018

4. REMOVE THE POWER SUPPLY FROM THE BATTERY

◄ VERIFY REPAIR QUALITY ►
−
−
−

Verify the operation of the cooling fans
Confirm the system Calibration has been updated successfully.
Confirm there are no DTC’s after the Calibration update.

9

X. APPENDIX
A. CUSTOMIZED SETTING SHEET (for LS500

& LS500h)

a) Techstream: Warning
Function

Settings (Put a check into applicable setting.)

Fr Corner Sensor Onset
Range

□ Short

□ Long

Rr Corner Sensor Onset
Range

□ Short

□ Long

Fr Sensor Onset Range

□ Narrow

□ Wide

Rr Sensor Onset Range

□ Narrow

□ Wide

□ Not Avail

□ Avail

□L

□M

□H

Object Not Moving 3s Buzz
Vol

□ Keep Vol

□L

□ M1

□ M2

Leave Buzzer Volume

□ Keep Vol

□L

□ M1

□ M2

Temporary Mute Reset
Speed Adjust

□ System

□ 15km/h

□20km/h

□ 30km/h

Keep Sense Buzzer
Fr & Rr Buzzer Volume