DTC U3003:16/U3003:17 [ABS HU/CM]

id040260877800

DTC

U3003:16

Battery power supply

U3003:17

DETECTION CONDITION

•  U3003:16

―  Low ignition voltage (8.4—9.6 V) is detected at the voltage monitor of the solenoid valve or motor monitor. (Except engine cranking condition)

―  Low ignition voltage (6.0—8.4 V) is detected at the voltage monitor of the solenoid valve or motor monitor

―  Low ignition voltage (below 6.0 V) is detected at the voltage monitor of the solenoid valve or motor monitor

•  U3003:17

―  High ignition voltage (17 V or more) is detected at the voltage monitor of the solenoid valve or motor monitor

FAIL-SAFE FUNCTION

Refer to DTC TABLE. (See DTC TABLE [ABS HU/CM].)

POSSIBLE CAUSE

•  DTC is stored in PCM

•  Battery malfunction

•  Generator malfunction

•  Fuse (SRS1 7.5A, ABS/DSCS 30A, ABS/DSCM 50A) malfunction

•  Open or short to GND circuit in wiring harness between battery and ABS HU/CM terminal Q

•  Open or short to GND circuit in wiring harness between battery and ABS HU/CM terminal A

•  Open or short to GND circuit in wiring harness between battery and ABS HU/CM terminal B

•  Open circuit in wiring harness between ABS HU/CM terminal AL and body ground

•  Poor connection at each connector

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY PCM DTC

•  Using the M-MDS, perform the PCM DTC inspection.
(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)

•  Are any DTCs present?

Yes

Go to applicable DTC inspection.

(See DTC TABLE [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)

DTC troubleshooting completed, then go to the next step.

No

Go to the next step.

2

INSPECT BATTERY

•  Inspect the battery.
(See BATTERY INSPECTION.)

•  Is there any malfunction?

Yes

Charge or replace the battery, then go to Step7.

(See BATTERY RECHARGING.)

(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)

No

Go to the next step.

3

INSPECT GENERATOR

•  Inspect the generator.
(See GENERATOR INSPECTION [WITHOUT i-ELOOP (SKYACTIV-G 1.3, SKYACTIV-G 1.5)].)

•  Is there any malfunction?

Yes

Replace the generator, then go to Step7.

(See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (SKYACTIV-G 1.3, SKYACTIV-G 1.5)].)

No

Go to the next step.

4

INSPECT FUSE CONDITION

•  Is the fuse (SRS1 7.5A, ABS/DSCS 30A, ABS/DSCM 50A) 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 ABS HU/CM terminal Q, A and B.

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 ABS HU/CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT

•  Switch the ignition OFF.

•  Disconnect the ABS HU/CM connector.

•  Switch the ignition ON (engine off).

•  Measure the voltage as followings:

―  ABS HU/CM terminal Q (wiring harness-side)—body ground

―  ABS HU/CM terminal A (wiring harness-side)—body ground

―  ABS HU/CM terminal B (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—ABS HU/CM terminal Q

•  Battery—ABS HU/CM terminal A

•  Battery—ABS HU/CM terminal B

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 ABS HU/CM GROUND CIRCUIT FOR OPEN CIRCUIT OR POOR GROUND

•  Switch the ignition OFF.

•  Disconnect the ABS HU/CM connector.

•  Inspect for continuity between ABS HU/CM terminal AL (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 ABS HU/CM terminal AL 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 ABS HU/CM terminal AL 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 a poor ground.

―  Go to the next step.

7

VERIFY DTC TROUBLESHOOTING COMPLETED

•  Reconnect all disconnected connectors.

•  Using the M-MDS, clear the DTC from the ABS HU/CM.
(See CLEARING DTC [ABS HU/CM].)

•  Start the engine and drive the vehicle at 20 km/h {12 mph} or more.

•  Using the M-MDS, perform the ABS HU/CM DTC inspection.
(See DTC INSPECTION [ABS HU/CM].)

•  Is the same DTC present?

Yes

Repeat the inspection from Step1

If the malfunction recurs, replace the ABS HU/CM, then go to the next step.

(See ABS HU/CM REMOVAL/INSTALLATION [L.H.D.].)

(See ABS HU/CM REMOVAL/INSTALLATION [R.H.D.].)

No

Go to the next step.

8

VERIFY NO DTC IS PRESENT

•  Are any DTCs present?

Yes

Go to applicable DTC inspection.

(See DTC TABLE [ABS HU/CM].)

No

DTC troubleshooting completed.

DTC	U3003:16	Battery power supply
	U3003:17
DETECTION CONDITION		• U3003:16 ― Low ignition voltage (8.4—9.6 V) is detected at the voltage monitor of the solenoid valve or motor monitor. (Except engine cranking condition) ― Low ignition voltage (6.0—8.4 V) is detected at the voltage monitor of the solenoid valve or motor monitor ― Low ignition voltage (below 6.0 V) is detected at the voltage monitor of the solenoid valve or motor monitor • U3003:17 ― High ignition voltage (17 V or more) is detected at the voltage monitor of the solenoid valve or motor monitor
FAIL-SAFE FUNCTION		Refer to DTC TABLE. (See DTC TABLE [ABS HU/CM].)
POSSIBLE CAUSE		• DTC is stored in PCM • Battery malfunction • Generator malfunction • Fuse (SRS1 7.5A, ABS/DSCS 30A, ABS/DSCM 50A) malfunction • Open or short to GND circuit in wiring harness between battery and ABS HU/CM terminal Q • Open or short to GND circuit in wiring harness between battery and ABS HU/CM terminal A • Open or short to GND circuit in wiring harness between battery and ABS HU/CM terminal B • Open circuit in wiring harness between ABS HU/CM terminal AL and body ground • Poor connection at each connector

Step	Inspection		Action
1	VERIFY PCM DTC • Using the M-MDS, perform the PCM DTC inspection. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 1.3, SKYACTIV-G 1.5].) • Are any DTCs present?	Yes	Go to applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 1.3, SKYACTIV-G 1.5].) DTC troubleshooting completed, then go to the next step.
1		No	Go to the next step.
2	INSPECT BATTERY • Inspect the battery. (See BATTERY INSPECTION.) • Is there any malfunction?	Yes	Charge or replace the battery, then go to Step7. (See BATTERY RECHARGING.) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
2		No	Go to the next step.
3	INSPECT GENERATOR • Inspect the generator. (See GENERATOR INSPECTION [WITHOUT i-ELOOP (SKYACTIV-G 1.3, SKYACTIV-G 1.5)].) • Is there any malfunction?	Yes	Replace the generator, then go to Step7. (See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (SKYACTIV-G 1.3, SKYACTIV-G 1.5)].)
3		No	Go to the next step.
4	INSPECT FUSE CONDITION • Is the fuse (SRS1 7.5A, ABS/DSCS 30A, ABS/DSCM 50A) normal?	Yes	Go to the next step.
4		No	• If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between fuse and ABS HU/CM terminal Q, A and B. 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 ABS HU/CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Switch the ignition OFF. • Disconnect the ABS HU/CM connector. • Switch the ignition ON (engine off). • Measure the voltage as followings: ― ABS HU/CM terminal Q (wiring harness-side)—body ground ― ABS HU/CM terminal A (wiring harness-side)—body ground ― ABS HU/CM terminal B (wiring harness-side)—body ground • Is the voltage 10 V or more?	Yes	Go to the next Step.
5		No	Refer to the wiring diagram and verify whether or not there is a common connector in the followings. • Battery—ABS HU/CM terminal Q • Battery—ABS HU/CM terminal A • Battery—ABS HU/CM terminal B 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 ABS HU/CM GROUND CIRCUIT FOR OPEN CIRCUIT OR POOR GROUND • Switch the ignition OFF. • Disconnect the ABS HU/CM connector. • Inspect for continuity between ABS HU/CM terminal AL (wiring harness-side) and body ground. • Is the resistance 0—1 ohm?	Yes	Go to the next step.
6		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 ABS HU/CM terminal AL 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 ABS HU/CM terminal AL 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 a poor ground. ― Go to the next step.
7	VERIFY DTC TROUBLESHOOTING COMPLETED • Reconnect all disconnected connectors. • Using the M-MDS, clear the DTC from the ABS HU/CM. (See CLEARING DTC [ABS HU/CM].) • Start the engine and drive the vehicle at 20 km/h {12 mph} or more. • Using the M-MDS, perform the ABS HU/CM DTC inspection. (See DTC INSPECTION [ABS HU/CM].) • Is the same DTC present?	Yes	Repeat the inspection from Step1 If the malfunction recurs, replace the ABS HU/CM, then go to the next step. (See ABS HU/CM REMOVAL/INSTALLATION [L.H.D.].) (See ABS HU/CM REMOVAL/INSTALLATION [R.H.D.].)
7		No	Go to the next step.
8	VERIFY NO DTC IS PRESENT • Are any DTCs present?	Yes	Go to applicable DTC inspection. (See DTC TABLE [ABS HU/CM].)
8	VERIFY NO DTC IS PRESENT • Are any DTCs present?	No	DTC troubleshooting completed.