TSB-14-35-003

SB-10057207-6407
Page 1 of 5
Technical Service Bulletin
SUBJECT:
ASC OFF LAMP ILLUMINATED WITH
DTCS C121D AND C121E
No:
TSB−14−35−003
DATE:
December, 2014
MODEL:
2007−09 Outlander
CIRCULATE TO:
[ ] GENERAL MANAGER
[ ] PARTS MANAGER
[ ] TECHNICIAN
[ ] SERVICE ADVISOR
[ ] SERVICE MANAGER
[ ] WARRANTY PROCESSOR
[ ] SALES MANAGER
PURPOSE
Some customers may report the ASC OFF indicator lamp is illuminated on the MID. During diagnosis,
the technician may determine replacement of the ABS−ECU is necessary to correct the condition. As
MMC has recently made a hydraulic unit repair kit available, replacement of the entire ABS/ASC assembly
is no longer necessary.
This TSB advises technicians to use the instructions in this TSB to repair the ABS hydraulic unit using the
repair kit identified in the Parts Information section of this TSB.
AFFECTED VEHICLES
2007−2009 Outlander equipped with Active Stability Control (ASC)
REPAIR PROCEDURE
Follow the instructions in the service manual to diagnose DTCs C121D and C121E. Repair as instructed.
If the diagnosis indicates replacement of the ABS/ASC assembly.
! CAUTION
D
Do not move the vehicle with the hydraulic unit removed.
D
Remove the hydraulic unit following instructions in Group 35C: Active Stability Control System (ASC)
of the service manual.
D
Protective caps are included in the repair kit to protect the brake fluid ports from contamination. Cap
the ports as soon as the unit is removed from the vehicle.
D
Rebuilding should be performed on a work bench in a clean environment, using clean tools and lint
free rags. Use only DOT 3 brake fluid for cleaning parts. DO NOT use cleaners containing mineral
spirits, or chlorinated cleaners when cleaning the unit (inner and outer surfaces).
D
Prevent the possibility of electrostatic discharge (ESD) by periodically touching a large, metal object
(e.g. metal work bench) while handling the assembled unit or ASC−ECU.
D
Keep the disassembled unit clean. Prevent dirt, dust and debris from contaminating the unit while
it is disassembled.
D
Avoid using compressed air for cleaning or drying to reduce the possibility of airborne contaminants
after the unit is disassembled.
D
Do not allow fluids to contaminate the electrical connector.
D
Do not touch the electrical contacts in the connector, pressure sensor or ASC−ECU.
D
Do not use a hydraulic unit that has been dropped or otherwise struck forcefully.
Copyright 2014, Mitsubishi Motors North America, Inc.
Continued
The information contained in this bulletin is subject to change. For the latest version of this document, go to the Mitsubishi Dealer Link,
MEDIC, or the Mitsubishi Service Information website (www.mitsubishitechinfo.com).
(4130)
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TSB−14−35−003
1. HYDRAULICS UNIT − GENERAL INFORMATION
HCU
The hydraulic unit consists of the hydraulic control unit
(HCU) and the ASC−ECU.
Separation for rebuilding is only possible after the
unit is removed from the vehicle.
ABS−ECU
2. NECESSARY TOOLS AND REPLACEMENT PARTS
1. D
1/4” long handle box wrench
D
Long extension
D
Socket wrench: 10mm, 12mm
2. Ring fork wrench: 10mm
3. T25 Torx screwdriver (1/4” drive)
4. Torque wrench (1/4” drive): 4 − 15Nm
5. MUT−III Scan Tool
Pump motor retainer
6. Hydraulic Control Unit Repair Kit
P/N 4670A532:
1 − Hydraulic Control Unit
6 − Protection plugs (M10/M12)
2 − Assembly screws
Foam Valve
Cover Protector
Pic.1 Removed from vehicle
10mm
3. HYDRAULICS UNIT REMOVAL
Remove the hydraulics unit from the vehicle following
instructions provided in Group 35C: Active Stability
Control System (ASC) of the service manual.
NOTE:
a. Disconnect the brake lines from the hydraulic unit.
Pic.2 Caps:
10mm x 4
12mm X 2
b. Insert plastic plugs provided in the kit into the open
brake fluid ports to prevent brake fluid spills.
12mm
Page 3 of 5
TSB−14−35−003
4. DISASSEMBLE THE ASC−ECU
a. Place the hydraulics unit on a clean cloth spread
over a flat, stable surface. Do not place it in a
vise.
b. Remove and discard the motor retaining screws.
! CAUTION
After removing the screws, the pump motor is
no longer secured to the HCU!
Make sure the pump motor and HCU are held
together while removing the screws.
Then
carefully separate the ASC−ECU from the HCU
after the screws are removed.
Pic.3 Disassembly of
hydraulics unit
NOTE:
The pump motor contact pins can be torn away during
disassembly due to corrosion, leaving it stuck to the HCU.
If this occurs, the complete hydraulic unit must be
replaced.
If the ASC−ECU contact pins (Pic.5) are damaged (ECU
connector, DC motor contact pins) the complete hydraulics
unit must be replaced.
Pic.4 Motor adapter
Pic.5 Contact pins
5. PREPARING THE NEW HCU AND ECU FOR
REASSEMBLY
Pressure
Sensor
NOTE:
D
While reassembled the hydraulics unit, take care
to not damage or touch the pressure sensor
contacts.
D
Take care to not damage the edge of the pressure
sensor housing. It is a sealing surface.
D
Prevent moisture and dirt from contaminating the
ASC−ECU.
D
The white potting compound on the bottom of the
ASC−ECU is a sealant and must not be removed.
New HCU
Original
ASC−ECU
Pic.6 Open hydraulics unit
Page 4 of 5
TSB−14−35−003
Pic.7 Pressure sensor contact area
(contact area and sealing surface)
Sealing surface)
Contacts (4)
D
Make sure the ASC−ECU pressure sensor contact
area does not become contaminated (Pic.7).
D
If necessary, turn the ASC−ECU upside down
before assembling it to the new HCU to remove
debris from the contact area close to the sensor.
D
Do not touch the pressure sensor contact area or
sealing surface. If it’s not possible to remove
contaminants from the area, replace the complete
hydraulics unit.
6. ASSEMBLE ELECTRONIC CONTROL UNIT
NOTE:
D
Do not remove six (6) brake fluid port sealing plugs
or the motor retainer from the new HCU until
assembly is complete and the hydraulics unit is
installed into the vehicle.
D
The hydraulics unit is not sealed until completely
reassembled and installed.
a. Remove the foam block from the new HCU.
Pic.8 Re−assembled new
HCU with old ASC−ECU
b. Reassemble the ASC−ECU to the new HCU. Align
the components and keep them level and square
to each other at all times to prevent damage to the
contacts and the edge of the contact housing.
c.
Secure the HCU to the ECU using two (2) new torx
head screws (provided). Torque to 5.5 + 0.5Nm
(47 + 4.5 in. lbs).
7. REINSTALL HYDRAULICS UNIT
Reinstall the hydraulics unit following instructions provided in Group 35C: Active Stability Control
System (ASC) of the service manual.
NOTE: Do not remove the plugs from the hydraulic ports until you are ready to attach the brake lines.
After removing two (2) plugs holding the motor retainer in place, the retainer can be discarded.
8. GENERAL NOTES FOR REASSEMBLY AND REINSTALLATION
D
Never use mineral oil or other cleaners. Use only Genuine Mitsubishi Brake Fluid, p/n MZ311987
for cleaning the inside of the hydraulics unit and brake fluid ports.
D
After repairs to the brake system, use the service manual to completely check all mechanical and
ABS.ASC components for proper operation. Check all hydraulic ports and connections for
leakage.
NOTE: A hydraulics unit can be rebuilt using this procedure a maximum of 5 times.
Page 5 of 5
TSB−14−35−003
PARTS INFORMATION
Use the following Genuine Mitsubishi Parts
Part #
4670A532
Description
Qty.
Hydraulic Control Unit Kit
1
WARRANTY INFORMATION
This bulletin is supplied as technical information only and is not an authorization to repair. If an affected
vehicle is reported with the described condition, diagnose using the service manual, repair as described
in this TSB and submit a normal warranty claim.
Rebuild ASC−ECU/HCU
Nature Code: 59J
Cause Code: 27D
Labor Operation No.: 354520 99
Time Allowance:
Warranty Coverage: BASIC Coverage
1.9 hr.