Hyundai: Engine D4FA. Manual — part 163
DIESEL CONTROL SYSTEM
FLA -523
2)
Measure the resistance between diagnostic connector 3 and 11.
3)
Disconnect ECM and TCM connector.
4)
Measure the resistance between diagnostic connector 3 and 11.
Specification : Both ECM and TCM connected : 60 ± 3Ω (Test 1)
Both ECM and TCM disconnected : 120 ± 3Ω (Test 2)
5)
Is CAN BUS resistance within the specification?
YES
▶ Go to "2.Check short to ground in CAN BUS" as follows.
NO
▶ Below 10Ω for both conditions(disconnected, connected) : Repair short between CAN BUS and go to "Veri-
fication of Vehicle Repair".
▶ 120Ω for both conditions(disconnected, connected) : Go to "4. Check CAN BUS continuity".
▶ Infinite Ω for both conditions(disconnected, connected) :Repair open in CAN communication circuit between
DLC terminal and In-pannel junction box.
2.
Check short to ground in CAN BUS
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect ECM and TCM connectors.
3)
Check continuity between DLC terminal 3 and chassis ground. (CAN HIGH)
4)
Check continuity between DLC terminal 11 and chassis ground. (CAN LOW)
Specification : Discontinuity ( Infinite Ω )
5)
Is measured resistance within the specification?
YES
▶ Go to "3. Check short to battery in CAN BUS".
NO
▶ Repair short to ground in circuit and go to "Verification of Vehicle Repair".
3.
Check short to battery in CAN BUS
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect ECM and TCM connectors.
3)
IG KEY "ON".
4)
Measure the voltage of DLC terminal 3. (CAN HIGH)
5)
Measure the voltage of DLC terminal 11. (CAN LOW)
Specification : 0.0V~0.1V
FLA -524
FUEL SYSTEM
6)
Is measured resistance within the specification with both connector disconnected?
YES
▶ Go to"4. Check CAN BUS continuity" as follows.
▶ Repair short to battery and go to "Verification of Vehicle Repair".
4.
Check CAN BUS continuity
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect ECM and TCM connectors.
3)
Check continuity between DLC terminal 3 and CAN HIGH terminal of each module.
( CAN HIGH : ECM connector terminal 84, TCM connector terminal 38, multipurpose check connector terminal
9 )
4)
Check continuity between DLC terminal 11 and CAN LOW terminal of each module.
( CAN LOW : ECM connector terminal 83, TCM connector terminal 36, multipurpose check connector terminal
17 )
Specification : Continuity(below 1.0Ω )
5)
Is the measured resistance within the specification?
YES
▶ Go to "Component Inspection".
NO
▶ Repair open in CAN BUS and go to "Verification of Vehicle Repair".
COMPONENT INSPECTION
E1594324
1.
Check CAN communication waveform generation
1)
IG KEY "OFF", ENGINE "OFF".
2)
Connect 2 channel scope to DLC terminal 3(CAN HIGH) and 11(CAN LOW).
3)
IG KEY "ON" after connecting only ECM to CAN BUS.
4)
IG KEY "ON" after connecting only TCM to CAN BUS.
Specification : At IG KEY "ON", the waveform same as "Signal Waveform & Data" of this code generates.
※ Different from "Signal Waveform & Data", if 1) both CAN HIGH and LOW signal are fixed at 2.5 V or
2) HIGH and LOW signal are fixed at 3.5 V and 1.5 V, respectively, it is due to communication error between modules.
DIESEL CONTROL SYSTEM
FLA -525
M33
4
6
* *
*
11
9
2
3
5
1
12
13
*
*
*
SCOP
EGNG014O
5)
Does correct waveform generate from each module?
YES
▶ Go to "Verification of Vehicle Repair".
NO
▶ Replace the module which generates poor communication waveform, and go to "Verification of Vehicle Re-
pair".
VERIFICATION OF VEHICLE REPAIR
E4790900
Refer to DTC U0001.
FLA -526
FUEL SYSTEM
DTC U0122 ECM-TCS CAN ERROR
COMPONENT LOCATION
EFEA188C
Refer to DTC U0001.
GENERAL DESCRIPTION
E6CC34AA
Refer to DTC U0001.
DTC DESCRIPTION
E1C72893
U0122 is set when ECM sends data requiring signal to TCS, but no return signal is transmitted to ECM by within 0.5 sec..
This code is due to TCS CAN line related problem or TCS module failure.
DTC DETECTING CONDITION
E2F94D50
Item
Detecting Condition
Possible Cause
DTC Strategy
• Signal monitoring
Enable Conditions
• IG KEY "ON"
ThresholdValue
• CAN communication error between ECM and TCS1
DiagnosticTime
• 500ms
Fuel Cut
NO
EGR Off
NO
Fuel Limit
NO
Fail Safe
MIL
NO
• CAN BUS
• CAN communication module
component
SPECIFICATION
E695251B
Refer to DTC U0001.
SCHEMATIC DIAGRAM
EAD37234
Refer to DTC U0001.
SIGNAL WAVEFORM AND DATA
E873CD80
Refer to DTC U0001.
TERMINAL AND CONNECTOR INSPECTION
E0B5A0A5
Refer to DTC U0001.
SIGNAL CIRCUIT INSPECTION
EC9F6063
1.
Check CAN BUS resistance
1)
IG KEY "OFF", ENGINE "OFF".
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