Hyundai Santa Fe (2006 year). Manual — part 246
BR -156
BRAKE SYSTEM
MONITOR ACTUATION TEST
EBFD31F0
1.
Connect scantool to Data Link Connector(DLC)
2.
Ignition "ON"
&
Engine "OFF".
3.
Select the "Actuation Test" mode on the scantool.
4.
Inspect opearating status of all vlaves with Actuation Test.
Specification : It’s normal if operating sound is heard.
Fig 1) Test Condition : Ignition "ON" & Engine "OFF".
Ex) Actuation Test on Front left valve(in)
Fig1
SCMBR6569L
5.
Do all valves operate normally?
YES
▶
Fault is intermittent caused by poor connection in power harness (ABS2) and/or HECU’s connector or wasrepaired
and HECU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corro-
sion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification Of Vehicle
Repair" procedure.
NO
▶
Go to "W/Harness Inspection" procedure.
TERMINAL
&
CONNECTOR INSPECTION
E91F6FE5
Refer to DTC C1200.
ABS (ANTI-LOCK BRAKE SYSTEM)
BR -157
POWER SUPPLY CIRCUIT INSPECTION
EB45563A
1.
Ignition "OFF".
2.
Disconnect HECU connector.
3.
Ignition "ON".
4.
Measure voltage between terminal "3" of the HECU harness connector and chassis ground.
Specification : Approx. B+
V
3. Battery(+)
1
5 6
8 9 10 11 12 13 14 15 16
18
20 21
26 27 28 29 30 31 32 33
35
37 38
2
3
4
*
*
*
* * * *
* * *
* *
*
*
*
*
*
<C281 GSL>
SCMBR6570L
5.
Is the measured voltage within specifications?
YES
▶
Go to "Ground Circuit Inspection" procedure.
NO
▶
Check for damaged harness and open or short to GND between the battery terminal(+) and terminal "3" of the
HECU harness connector. Check for open or blown 40A ABS fuse referring to "Circuit Diagram". Repair as necessary
and then go to "Verification of vehicle Repair" procedure.
GROUND CIRCUIT INSPECTION
E513968B
Refer to DTC C1101.
VERIFICATION OF VEHICLE REPAIR
E5E5A1F6
Refer to DTC C1101.
BR -158
BRAKE SYSTEM
DTC C2308 FL INLET VALVE MALFUNCTION
DTC C2316 FR INLET VALVE MALFUNCTION
DTC C2324 RL INLET VALVE MALFUNCTION
DTC C2332 RR INLET VALVE MALFUNCTION
COMPONENT LOCATION
E0DE60DF
Refer to DTC C1235.
GENERAL DESCRIPTION
EFB7DCDD
The HECU is composed of an ECU (Electronic Control Unit ) and an HCU( Hydraulic Control Unit), so the HECU hardware
includes all solenoid valves inside the unit as well as the ECU. Solenoid valves are switched to ON, OFF by HECU when
the ABS is activated. Solenoid valves function is to increase, decrease or maintain the hydralic pressure supplied to a
brake caliper.
DTC DESCRIPTION
ED337373
The HECU monitors the operation of the valves by checking the drive circuit of the solenid valves, and then sets this code
when the unexpcted drive voltage is detected. For example, the HECU sets the DTC if the electrical feedback signal does
not match the actuation signal for the corresponding valve.
ABS (ANTI-LOCK BRAKE SYSTEM)
BR -159
DTC DETECTING CONDITION
E9273E4B
Item
Detecting Condition
Possible cause
DTC Strategy
• Voltage monitoring
Monitoring
Period
• Continuous
Case 1
Enable
Conditions
• The electrical feedback signal does not match
the actuation signal for the corresponding
valve for more than 30 ms.
- Current controlled valves and under voltage
conditions :detection time is 80 ms
Monitoring
Period
• Immediately after power on
• every 20 s
- The Test is canceled if any control, valve
actuation takes place or if the Vehicle is in
motion and the BLS is on.
Case 2
Enable
Conditions
• A Fault is found if UVR is not within 0.1*battery
voltage
<
valve relay voltage
<
0.8*battery voltage
• A Fault is found if valve relay voltage
≥
0.2*battery voltage.
- After that all valves are switched on sequential,
valve relay voltage and valve feedback is measured.
Monitoring
Period
• The Valve and Pump motor Test is performed once
after ignition on if vehicle speed is
>
= 15 km/h.
Case 3
Enable
Conditions
• The valve and pump motor test detects electrical
actuation malfunction of ABS valves. The test
actuates all valves in series (to detect short cuts
or shunts between the valve lines). Faults are
detected if there is an error during the test.
Monitoring
Period
• The drift test executes only once during an ignition
Cycle. The test is triggered if the following conditions
are fulfilled : 10min after power up or end of control
1)
No BLS is applied
2)
Brake pressure is
<
10 bar
3)
Vehicle speed
>
15 km/h
4)
Vehicle acceleration
>
0.5 m/s
²
5)
Supply voltage
>
11 volts.
Case 4
Enable
Conditions
• The drift test is executed only once during an
ignition Cycle.If it detects partly shorted valve
coils,almost inoperative coils or malfunction of
the valve driver, a failure is recognized.
Fail Safe
• Valve cannot be actuated or valve is incorrectly
actuated. This may result in locked wheels
or wheels without pressure.
• ABS/EBD/ESP function is prohibited.
• ABS/EBD/ESP warning lamp is turned ON.
• Inoperative HECU
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