DTC U3003:16/U3003:17 [EVP CONTROL UNIT]

id040251838600

DTC
U3003:16
EVP cintrol unit power supply low input
U3003:17
EVP cintrol unit power supply high input
DETECTION CONDITION
•  DTC U3003:16
―  The power supply voltage for the EVP control unit is 8.3 V or less for a continuous 0.1 s.
•  DTC U3003:17
―  The power supply voltage for the EVP control unit is 17.4 V or more for a continuous 0.1 s.
FAIL-SAFE FUNCTION
•  Refer to “Fail-safe function table”. (See DTC TABLE [EVP CONTROL UNIT].)
POSSIBLE CAUSE
Without i-ELOOP
•  DTC is stored in PCM
•  Battery malfunction
•  Generator malfunction
•  Fuse (EVPS 30A) malfunction
•  Short to ground or open circuit in wiring harness between battery and EVP control unit terminal A
•  Open circuit in wiring harness between EVP control unit terminal G and body ground
•  Poor connection at each connector
•  EVP control unit malfunction
With i-ELOOP
•  DTC is stored in PCM
•  Battery malfunction
•  DTC is stored in DC-DC converter (i-ELOOP)
•  Fuse (EVPS 30A) malfunction
•  Short to ground or open circuit in wiring harness between battery and DC-DC converter terminal 3A
•  Short to ground or open circuit in wiring harness between DC-DC converter terminal 4A and EVP control unit terminal A
•  Open circuit in wiring harness between EVP control unit terminal G and body ground
•  Poor connection at each connector
•  DSC HU/CM malfunction


Diagnostic Procedure


Without i-ELOOP

Step

Inspection

Action
1
VERIFY PCM DTC
•  Using the M-MDS, perform the PCM DTC inspection.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-G 1.5, SKYACTIV-G 2.0)].)
DTC troubleshooting completed, then go to the next step.
No
Go to the next step.
2
INSPECT BATTERY
•  Inspect the battery.
•  Is there any malfunction?
Yes
Charge or replace the battery, then go to Step7.
(See BATTERY RECHARGING.)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
No
Go to the next step.
3
INSPECT GENERATOR
•  Inspect the generator.
•  Is there any malfunction?
Yes
Replace the generator, then go to Step7.
(See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (SKYACTIV-G 1.5, SKYACTIV-G 2.0)].)
No
Go to the next step.
4
INSPECT FUSE CONDITION
•  Is the fuse (EVPS 30A) normal?
Yes
Go to the next step.
No
•  If the fuse is blown:
―  Refer to the wiring diagram and verify whether or not there is a common connector between fuse and EVP control unit terminal A.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
•  Replace the fuse.
•  If the fuse is damaged:
―  Replace the fuse.
Go to Step7.
5
INSPECT EVP CONTROL UNIT POWER CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition OFF.
•  Disconnect the EVP control unit connector.
•  Switch the ignition ON (engine off).
•  Measure the voltage between EVP control unit terminal A (wiring harness-side)—body ground.
•  Is the voltage 10 V or more?
Yes
Go to the next Step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between battery and EVP control unit terminal A.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step7.
6
INSPECT EVP CONTROL UNIT GROUND CIRCUIT FOR OPEN CIRCUIT OR POOR GROUND
•  Switch the ignition OFF.
•  Disconnect the EVP control unit connector.
•  Measure the resistance between EVP control unit terminal G (wiring harness-side) and body ground.
•  Is the resistance 0—1 ohm?
Yes
Go to the next step.
No
•  If the open circuit could be detected in the wiring harness:
―  Refer to the wiring diagram and verify whether or not there is a common connector between EVP control unit terminal G and body ground.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
―  Go to the next step.
•  If the resistance is out of specification:
―  Refer to the wiring diagram and verify whether or not there is a common connector between EVP control unit terminal G and body ground.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a poor ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a poor ground.
―  Go to the next step.
7
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Using the M-MDS, clear the DTC from the EVP control unit.
•  Using the M-MDS, perform the EVP control unit DTC inspection.
•  Is the same DTC present?
Yes
Repeat the inspection from Step1.
If the malfunction recurs, replace the EVP control unit, then go to the next step.
(See EVP CONTROL UNIT REMOVAL/INSTALLATION [L.H.D.].)
(See EVP CONTROL UNIT REMOVAL/INSTALLATION [R.H.D.].)
No
Go to the next step.
8
VERIFY NO DTC IS PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [EVP CONTROL UNIT].)
No
DTC troubleshooting completed.


With i-ELOOP

Step

Inspection

Action
1
VERIFY PCM DTC
•  Using the M-MDS, perform the PCM DTC inspection.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-G 1.5, SKYACTIV-G 2.0)].)
DTC troubleshooting completed, then go to the next step.
No
Go to the next step.
2
INSPECT BATTERY
•  Inspect the battery.
•  Is there any malfunction?
Yes
Charge or replace the battery, then go to Step7.
(See BATTERY RECHARGING.)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
No
Go to the next step.
3
VERIFY DC-DC CONVERTER DTC
•  Using the M-MDS, perform the DC-DC converter DTC inspection.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [i-ELOOP].)
DTC troubleshooting completed, then go to the next step.
No
Go to the next step.
4
INSPECT FUSE CONDITION
•  Is the fuse (EVPS 30A) normal?
Yes
Go to the next step.
No
•  If the fuse is blown:
―  Refer to the wiring diagram and verify whether or not there is a common connector between fuse and EVP control unit terminal A.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
•  Replace the fuse.
•  If the fuse is damaged:
―  Replace the fuse.
Go to Step7.
5
INSPECT EVP CONTROL UNIT POWER CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition OFF.
•  Disconnect the EVP control unit connector.
•  Switch the ignition ON (engine off).
•  Measure the voltage between EVP control unit terminal A (wiring harness-side)—body ground.
•  Is the voltage 10 V or more?
Yes
Go to the next Step.
No
Refer to the wiring diagram and verify whether or not there is a common connector in the followings.
•  Battery—DC-DC converter terminal 3A
•  DC-DC converter terminal 4A—EVP control unit terminal A
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step7.
6
INSPECT EVP CONTROL UNIT GROUND CIRCUIT FOR OPEN CIRCUIT OR POOR GROUND
•  Switch the ignition OFF.
•  Disconnect the EVP control unit connector.
•  Measure the resistance between EVP control unit terminal G (wiring harness-side) and body ground.
•  Is the resistance 0—1 ohm?
Yes
Go to the next step.
No
•  If the open circuit could be detected in the wiring harness:
―  Refer to the wiring diagram and verify whether or not there is a common connector between EVP control unit terminal G and body ground.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
―  Go to the next step.
•  If the resistance is out of specification:
―  Refer to the wiring diagram and verify whether or not there is a common connector between EVP control unit terminal G and body ground.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a poor ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a poor ground.
―  Go to the next step.
7
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Using the M-MDS, clear the DTC from the EVP control unit.
•  Using the M-MDS, perform the EVP control unit DTC inspection.
•  Is the same DTC present?
Yes
Repeat the inspection from Step1.
If the malfunction recurs, replace the EVP control unit, then go to the next step.
(See EVP CONTROL UNIT REMOVAL/INSTALLATION [L.H.D.].)
(See EVP CONTROL UNIT REMOVAL/INSTALLATION [R.H.D.].)
No
Go to the next step.
8
VERIFY NO DTC IS PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [EVP CONTROL UNIT].)
No
DTC troubleshooting completed.