Hyundai Santa Fe (2006 year). Manual — part 242

BR -140

BRAKE SYSTEM

CAN BUS SHORT (TO GROUND) INSPECTION

1.

Ignition "OFF".

2.

Disconnet the HECU harness connector.

3.

Measure resistance between terminal "14, 35" of the HECU harness connector and chassis ground.

Specification : Approx.

∞ Ω

Ω

Ω

<C281>

<VDC>
14. CAN (LOW)
35. CAN (HIGH)

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

*

*

*

* * * *

* * *

* *

*

*

*

*

*

SCMBR6564L

4.

Is the measured resistance within specifications?

YES

▶

Go to "CAN Bus Short (to battery) Inspection" procedure.

NO

▶

Check for short to ground in CAN HIGH signal harness in case of abnormal resistance measured betweenterminal

"35" of the HECU harness connector and chassis ground. Repair as necessary and then go to "Verification Of Vehicle
Repair" procedure.

▶

Check for short to ground in CAN LOW signal harness in case of abnormal resistance measured betweenterminal

"14" of the HECU harness connector and chassis ground. Repair as necessary and then go to "Verification Of Vehicle
Repair" procedure.

ABS (ANTI-LOCK BRAKE SYSTEM)

BR -141

CAN BUS SHORT (TO BATTERY) INSPECTION

1.

Ignition "OFF".

2.

Disconnet the HECU harness connector.

3.

Measure voltage between terminal "14, 35" of the HECU harness connector and chassis ground.

Specification : Below. 0.2 V

V

<C281>

<VDC>
14. CAN (LOW)
35. CAN (HIGH)

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

*

*

*

* * * *

* * *

* *

*

*

*

*

*

V

SCMBR6565L

4.

Is the measured resistance within specifications?

YES

▶

Go to "CAN Bus Short (between HIGH and LOW) Inspection" procedure.

NO

▶

Check for short to battery in CAN HIGH signal harness in case of abnormal resistance measured betweenterminal

"14" of the HECU harness connector and chassis ground. Repair as necessary and then go to "Verification Of Vehicle
Repair" procedure.

▶

Check for short to battery in CAN LOW signal harness in case of abnormal resistance measured betweenterminal

"35" of the HECU harness connector and chassis ground. Repair as necessary and then go to "Verification Of Vehicle
Repair" procedure.

BR -142

BRAKE SYSTEM

CAN BUS SHORT (BETWEEN HIGH AND LOW) INSPECTION

1.

Ignition "OFF".

2.

Disconnet all the connetor related to CAN such as HECU, PCU, EPS, ECS harness connector.

3.

Measure resistance between terminal "14, 35" of the HECU harness.

Specification : Approx. 120

Ω

V

<C281>

<VDC>
14. CAN (LOW)
35. CAN (HIGH)

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

*

*

*

* * * *

* * *

* *

*

*

*

*

*

V

SCMBR6565L

4.

Is the measured resistance within specifications?

YES

▶

Go to "Component Inspection" procedure.

NO

▶

Check for short in CAN signal harness between terminal "14" of the HECU harness connector and terminal "35"

of the HECU harness connector. Repair as necessary and then go to "Verification of vehicle Repair" procedure.

ABS (ANTI-LOCK BRAKE SYSTEM)

BR -143

COMPONENT INSPECTION

EEE71ACE

1.

Ignition "OFF".

2.

Ignition "ON".

3.

Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode.

4.

Using a scantool, Clear DTC.

5.

Select "Diagnostic Trouble Codes(DTCs)" mode again.

6.

Are any DTCs present?

YES

▶

Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and

then go to "Verification Of Vehicle Repair" procedure.

NO

▶

Fault is intermittent caused by faulty HECU or was repaired and HECU memory was not cleared. go to "Verification

of Vehicle Repair" procedure.

VERIFICATION OF VEHICLE REPAIR

EB1C1480

Refer to DTC C1101.