5 L4-2.3L (2007)
Power Steering Line/Hose: All Technical Service Bulletins
Power Steering - High Steering Effort/MIL/DTC C1099
Bulletin No:
06-001/10 Last Issued: 04/09/2010
Subject:
HEAVY STEERING
EFFORT WITH POWER STEERING MALFUNCTION INDICATOR LAMP ON AND DTC Cl 099
BULLETIN NOTE
APPLICABLE MODEL(S)NINS
2007-2009 Mazda3 vehicles (NOT including Mazdaspeed3) with VINS below (produced between April 1, 2007
and November 4, 2008)
^ 2OO7JM1BK******742201 -774382
^ All 2008
^ 2009 JM1BK****** 187372 - 251982
2007-2009 Mazda5 vehicles with VINS JM1 CR****** 155672 - 349055 (produced between produced between
April 1, 2007 and November 4, 2008)
DESCRIPTION
Some customers may feel that the steering effort is hard or heavy with power steering malfunction indicator lamp illumination and DTC Cl 099
[ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS)] stored in memory. This problem is caused by contamination of the system from
such things as corrosion getting inside the power steering line, sticking in the power steering pump, and lowering the revolution speed. The system then
goes into a fail safe function.
Customers having this concern should have their vehicle repaired using the following repair procedure.
REPAIR PROCEDURE OUTLINE
1. Verify customer concern.
2. Clean the steering gear box by flushing all fluid lines with 10 quarts of fluid.
3.
Remove the electric power steering oil pump assembly (A) and
(B).
4. Replace the power steering oil pump unit (shaded part of A) on the pump assembly with oil pump kit.
5. Install the repaired power steering oil pump assembly and new
6. Fill the pump reservoir with ATF MIII and remove air from the line.
REQUIRED PARTS
Although there are no special tools required for the flushing procedure, some locally sourced parts and fabrication are necessary. These parts are
commonly found at large home improvement centers or hardware stores.
FLUSHING PARTS PREPARATION (required one time)
1. Drill a hole for the appropriate sized fluid fitting through the side ofthe bucket within a 1/2" of the bottom, then clean the shavings out of the bucket.
NOTE:If using the CARLON ENVIROFLEX" 1/2" fluid fitting drill a 3/4" diameter hole.
CAUTION:EAreme care must be taken to avoid contamination of the ATF and the bucket since just a fraction of contamination (about 40-50 micron)
might damage the pump. Take proper care when storing or using the ATF and the bucket by placing a lid or cover on them.
FLUSHING PROCEDURE
1. Raise the car on a hoist and remove the right front wheel.
2. Remove the undercover and right side splash shield.
