TSBCHA098_R1
Service Bulletin Details
Public Details for: TSBCHA098_R1
Tsbcha098_r1: ibau system repair for noise and air bleeding - this bulletin has been revised to include additional information. This bulletin provides the repair procedure for the integrated brake actuation unit (ibau) system on some 2014-2
- 2019 - 2018 - 2017 - 2016 - 2015 - 2014 -
Models from 2019
2019 KIA NIRO |
2019 KIA NIRO PLUG-IN HYBRID |
2019 KIA OPTIMA HYBRID |
2019 KIA OPTIMA PHEV |
2019 KIA SOUL EV |
Models from 2018
2018 KIA NIRO |
2018 KIA NIRO PHEV |
2018 KIA NIRO PLUG-IN HYBRID |
2018 KIA OPTIMA HYBRID |
2018 KIA OPTIMA PHEV |
2018 KIA SOUL EV |
Models from 2016
2016 KIA OPTIMA HYBRID |
2016 KIA SOUL EV |
Models from 2015
2015 KIA OPTIMA HYBRID |
2015 KIA SOUL EV |
Models from 2014
2014 KIA OPTIMA HYBRID |
GROUP CHA MODEL 2014-2019MY All Listed Models NUMBER 098 (Rev 1, 08/28/2019) DATE August 2019 TECHNICAL SERVICE BULLETIN SUBJECT: IBAU SYSTEM REPAIR FOR NOISE AND AIR BLEEDING NOTICE This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides the repair procedure for the Integrated Brake Actuation Unit (iBAU) system on some 2014-2019MY EV/Hybrid/Plug-In Hybrid vehicles listed (see table), which may exhibit a “Honking” (Hissing) noise due to air remaining in the brake fluid system. Perform the air bleeding procedure outlined in this bulletin for the “Honking (Hissing) noise” concern when operating the brake pedal. Note: It is not recommended to replace the iBAU, Pressure Source Unit (PSU) and/or other related Active Hydraulic Boost (AHB) brake system components for this noise concern. iBAU Repair Application Table Model Vehicle Model Year iBAU PSU Niro (DE HEV/PHEV) 2017-2019MY Optima (TF HEV) 2014-2016MY Optima (JF HEV/PHEV) 2017-2019MY Soul ( PS EV) 2015-2019MY Audio Media File: Click for “Honk” sample noise. Video Media File: Click for “IBAU Air Bleeding” procedure. Air remaining in the brake system. File Under:Circulate To: X General Manager X Service Advisors X Technicians X Service Manager X Parts Manager X Body Shop Manager Fleet Repair Page 2 of 3 IBAU SYSTEM REPAIR FOR NOISE AND AIR BLEEDING SUBJECT: Comparison between General and iBAU brake systems: Integrated Brake Actuation Unit (iBAU): When a driver presses the brake pedal, the iBAU delivers brake fluid charged in the PSU to the calipers by opening a valve. When pressing the brake pedal, high pressure brake fluid passes through the internal iBAU valve. Then, the valve operating sound “click” will be heard. Pressure Source Unit (PSU): The PSU continuously charges and stores brake fluid at high pressure (2,321 – 2,611 psi., 160180 Bar) by operating the PSU motor. When a driver presses the brake pedal, the brake fluid is then delivered to the calipers through the iBAU valve. After pressing the brake pedal, the normal PSU motor operating sound “grrr” will be heard while it recharges the lowered pressure. Air Bleeding Procedure: NOTICE The iBAU consists of 3 brake fluid lines in total (low/high pressure and pedal simulator lines), therefore, air bleeding should be made sequentially following the procedure below. Procedure iBAU/AHB Brake System Bleeding 1. Step Repair iBAU ECU 1 Low Pressure and Simulator Fluid Lines OFF 2 High Pressure Brake Fluid Line ON 3 Fluid Circulation Mode with KDS ON Refer to the “Brake System → Brake Bleeding Procedure” chapter in the applicable Shop Manual on KGIS. Air Bleeding Tool Installation Procedure AHB Brake System Bleeding (Steps 1, 2 and 3) Air Bleeding Tool Removal Procedure TSB: CHA098 (Rev 1) Multiple Models August 2019 Page 3 of 3 IBAU SYSTEM REPAIR FOR NOISE AND AIR BLEEDING SUBJECT: AFFECTED VEHICLE RANGE: Model Production Date Range Niro (DE HEV) 2017MY through 2019MY Niro (DE PHEV) 2018MY through 2019MY Optima (TF HEV) 2014MY through 2016MY Optima (JF HEV) 2017MY through 2019MY Optima (JF PHEV) 2017MY through 2019MY Soul (PS EV) 2015MY through 2019MY REQUIRED TOOL: Tool Name Figure Comments Located in SST Cabinet Drawer #7 SST 09580 3D100 WARRANTY INFORMATION: N Code: Q55 C Code: ZZ3 Model Claim Type Causal P/N Niro (DE) P/HEV 58714 G2300 Optima (TF) HEV 58732 2T500 W Qty. 58732 C1100 Soul (PS) EV 58732 B2000 Labor Op Code Op Time Replacement P/N Qty. 58700A1H 1.5 M/H N/A 0 iBAU System AHB Brake System Bleeding 0 Optima (JF) P/HEV Repair Description iBAU System AHB Brake System Bleeding iBAU System AHB Brake System Bleeding TSB: CHA098 (Rev 1) Multiple Models August 2019