Hyundai: Engine D4FA. Manual — part 95
DIESEL CONTROL SYSTEM
FLA -251
SIGNAL CIRCUIT INSPECTION
EE186438
1.
Check signal circuit voltage
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect CKPS connector.
3)
IG KEY "ON".
4)
Measure the voltage of CKPS connector terminal 2 and 3.
Specification : 2.4V~2.6V
5)
Is the measured voltage within the specification?
YES
▶ Go to "3.Check short between signal circuits."
NO
▶ Go to "2.Check open in signal circuit" as follows.
2.
Check open in signal circuit
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect CKPS connector and ECM connector.
3)
Check continuity between CKPS connector terminal 2 and ECM connector terminal 12(A/T),27(M/T).
4)
Check continuity between CKPS connector terminal 3 and ECM connector terminal 27(A/T),12(M/T).
Specification : continuity ( below 1.0Ω )
5)
Is the measured resistance within the specification?
YES
▶ Go to "3. Check short between signal circuits".
NO
▶ Repair open in signal circuit and go to "Verification of Vehicle Repair".
3.
Check short between signal circuits
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect CKPS connector and ECM connector.
3)
Check continuity between CKPS connector terminal 2 and 3.
Specification : Discontinuity ( Infinite Ω )
4)
Is the measured resistance within the specification?
FLA -252
FUEL SYSTEM
YES
▶ Go to "4. Check short to ground in signal circuit" as follows.
NO
▶ Repair short between signal circuits and go to "Verification of Vehicle Repair".
4.
Check short to ground in signal circuit
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect CKPS connector and ECM connector.
3)
Check continuity between CKPS connector terminal 1(shield ground) and 2,3(crank signal)
Specification : Discontinuity ( Infinite Ω )
4)
Is the measured resistance within the specification?
YES
▶ Go to "Ground Circuit Inspection".
NO
▶ Repair the short between signal circuit and shield ground and go to "Verification of Vehicle Repair".
GROUND CIRCUIT INSPECTION
E91966FC
1.
IG KEY "OFF", ENGINE "OFF".
2.
Disconnect CKPS connector.
3.
Check continuity between CKPS connector terminal 1(shield ground) and chassis ground.
Specification : continuity ( below 1.0Ω )
4.
Is the measured resistance within the specification?
YES
▶ Go to "Component Inspection".
NO
▶ Repair open or poor connection in ground circuit and go to "Verification of Vehicle Repair".
COMPONENT INSPECTION
E5F58310
1.
Check Resistance of CKPS component
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect CKPS connector.
3)
Check resistance between CKPS connector terminal 2 and 3 at component side.
DIESEL CONTROL SYSTEM
FLA -253
Specification : 860Ω ±10% (20℃)
2
3
1
EGNG006B
4)
Is the measured resistance within the specification?
YES
▶ Go to "Check short to ground in CKPS component" as follows.
NO
▶ Replace CKPS and go to "Verification of Vehicle Repair".
2.
Check short to ground in CKPS component
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect CKPS connector.
3)
Check resistance between CKPS connector terminal 1 and 3 at component side.
Specification : Discontinuity (Infinite Ω )
2
3
1
EGNG006C
4)
Is the measured resistance within the specification? (Is the inside of component insulated correctly?)
YES
▶ Go to "Check CKPS waveform".
NO
▶ Replace CKPS and go to "Verification of Vehicle Repair".
3.
Check CKPS waveform
1)
IG KEY "OFF", ENGINE "OFF".
FLA -254
FUEL SYSTEM
2)
Connect CKPS connector.
3)
Connect Oscilloscope to CKPS connector terminal 2.
4)
Check if CKPS waveform is outputted correctly as cranking or turning engine on.
Specification : Refer to "Signal waveform & data" of "General Information".
5)
Is CKPS waveform outputted correctly?
YES
▶ Go to "Verification of Vehicle Repair".
NO
▶ Replace CKPS and go to "Verification of Vehicle Repair".
VERIFICATION OF VEHICLE REPAIR
E94E67A2
Refer to DTC P0335.
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