Hyundai Santa Fe (2006 year). Manual — part 238
BR -124
BRAKE SYSTEM
SIGNAL CIRCUIT INSPECTION
EEBC21E6
1.
Ignition "ON"
&
Engine "OFF"
&
ESP Switch"ON".
2.
Measure voltage between terminal "31" of the HECU harness connector and chassis ground.
Specification : Approx B+
V
31. ESP Switch
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>
SCMBR6557L
3.
Is the measured voltage within specifications?
YES
▶
Fault is intermittent caused by open or short in ESP switch line, inoperative ESP switch or was repaired and HECU
memory was not cleared. Go to the applicable troubleshooting procedure.
NO
▶
Check for damaged harness and poor connection in the power harness between the battery terminal(+) and the
terminal "31" of the HECU harness connector . Check for open or blown 10 A fuse referring to "Circuit Diagram" .
Repair as necessary and then go to "Verification Of vehicle Repair" procedure.
▶
If OK, Go to "Component Inspection" Procedure.
ABS (ANTI-LOCK BRAKE SYSTEM)
BR -125
COMPONENT INSPECTION
EF2CACB9
1.
Ignition "ON".
2.
Disconnect ESP switch connector.
3.
Press the ESP switch.
4.
Measure resistance between terminal "3, 4" of the ESP switch component connector and terminal "4, 5" of the ESP
switch component connector.
Specification :
Approx. below 1
Ω
- ESP switch is depressed. .
Approx.
∞ Ω
- ESP switch is not depressed
3. Power supply
4. Signal line
<M23>
Ω
*
*
2
3
4
5
SCMBR6561L
5.
Is the measured resistance within specifications?
YES
▶
Fault is intermittent caused by inoperative ESP switch or was repaired and HECU memory was not cleared. Go
to the applicable troubleshooting procedure.
NO
▶
Substitute with a known-good ESP switch and check for proper operation. If problem is corrected, replace ESP
switch and then go to "Verification Of Vehicle Repair" procedure.
VERIFICATION OF VEHICLE REPAIR
EF9F4B63
Refer to DTC C1101.
BR -126
BRAKE SYSTEM
DTC C1513 BRAKE SWITCH ERROR
COMPONENT LOCATION
EAA84560
SCMBR6558L
GENERAL DESCRIPTION
E97C7A58
The brake light switch indicates brake pedal status to the ABS control unit. The brake light switch which is dual switch type
send brake light signal to HECU. The switch is turned on when brake is depressed. The brake light switch runs to battery
voltage when brake depressed. but The brake light switch doesn’t run to battery voltage when brake is not depressed.
On the contrary, The brake switch is normally close type which doesn’t run to battery voltage when brake depressed.
DTC DESCRIPTION
E308E9E1
The brake light signal is a reference to judge driver’s intention for braking and The HECU checks open or short circuit of
brake light switch for normal ABS/ESP control. If an error exists, warning lamp will be turned ON.
ABS (ANTI-LOCK BRAKE SYSTEM)
BR -127
DTC DETECTING CONDITION
EC7FF7E5
Detecting Condition
Possible cause
• Voltage monitoring
Monitoring
Period
• Continuous (only no under voltage is not detected)
Case 1
Enable
Conditions
• If the BLS-signals is high for 60 s, while the gas
pedal is stepped, with vehicle speed
>
10.8
km/h, offset compensated pressure
<
5 bar and
no control is active, a fault is set.
Monitoring
Period
• Continuous (only normal voltage)
Case 2
Enable
Conditions
• For redundancy reasons an additional
BLSpVor-signal is created by the pressure sensor
signal. If the pressure sensor is compensated, the
threshold for generating the BLSpVor signal is 10
bar. If the pressure sensor is not compensated,
the threshold is increased by 15 bar. If this
signal is set without any hardware-BLS-signals
being set for at least 1s.
• If the pressure signal is higher than 80bar
and not both of the hardware-BLS are set,
a fault is stored after 1s.
• Inhibit the ESP control and ABS/EBD
control is available.
• The ESP warning lamps are activated.
• Open circuit in brake
switch line
• Inoperative brake light switch
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