DTC U3003:16 [AFS (ADAPTIVE FRONT LIGHTING SYSTEM)]

id0902g9935200

DESCRIPTION

Low power supply circuit voltage
DETECTION CONDITION
•  AFS control module power supply circuit voltage is lower than 9 V for 10 s or more, while the ignition is ON.
POSSIBLE CAUSE
•  PCM DTC is stored
•  Battery malfunction
•  Generator malfunction
•  AFS control module connector or terminals malfunction
•  Open circuit or short to ground in AFS control module power supply circuit:
―  Short to ground in wiring harness between ignition switch*1/relay block*2 and AFS control module terminal H
―  METER 15 A fuse malfunction
―  Open circuit in wiring harness between ignition switch*1/relay block*2 and AFS control module terminal H
•  AFS control module malfunction

*1  :Vehicles without advanced keyless entry and push button start system
*2  :Vehicles with advanced keyless entry and push button start system

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
CONFIRM PCM DTC
•  Perform the DTC Reading Procedure to confirm the PCM DTC.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [LF, L5].)
(See DTC TABLE [ZY, Z6].)
(See DTC TABLE [MZ-CD 1.6 (Y6) (EURO4 emission level)].)
(See DTC TABLE [MZ-CD 1.6 (Y6) (EURO5 emission level)].)
(See DTC TABLE [MZR-CD 2.2].)
(See DTC TABLE [MZR 2.0 DISI i-stop].)
(See DTC TABLE [L3 Turbo].)
No
Go to the next step.
2
INSPECT BATTERY
•  Inspect the battery.
•  Is there any malfunction?
Yes
Recharge or replace the battery, then go to Step 6.
(See BATTERY RECHARGING [LF, L5].)
(See BATTERY RECHARGING [ZY, Z6].)
(See BATTERY RECHARGING [MZ-CD 1.6 (Y6)].)
(See BATTERY RECHARGING [MZR-CD 2.2].)
(See BATTERY RECHARGING [MZR 2.0 DISI i-stop].)
(See BATTERY RECHARGING [L3 Turbo].)
(See BATTERY REMOVAL/INSTALLATION [LF, L5].)
(See BATTERY REMOVAL/INSTALLATION [ZY, Z6].)
(See BATTERY REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)
(See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].)
(See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
(See BATTERY REMOVAL/INSTALLATION [L3 Turbo].)
No
Go to the next step.
3
INSPECT GENERATOR
•  Inspect the generator.
•  Is there any malfunction?
Yes
Replace the generator, then go to Step 6.
(See GENERATOR REMOVAL/INSTALLATION [LF, L5].)
(See GENERATOR REMOVAL/INSTALLATION [ZY, Z6].)
(See GENERATOR REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)
(See GENERATOR REMOVAL/INSTALLATION [MZR-CD 2.2].)
(See GENERATOR REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
(See GENERATOR REMOVAL/INSTALLATION [L3 Turbo].)
No
Go to the next step.
4
INSPECT AFS CONTROL MODULE CONNECTOR AND TERMINALS
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the AFS control module connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 6.
No
Go to the next step.
5
INSPECT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND
•  AFS control module connector is disconnected.
•  Reconnect the negative battery cable.
•  Switch the ignition to ON.
•  Measure the voltage at the following terminal (wiring harness-side):
―  AFS control module terminal H
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the METER 15 A fuse.
If the fuse is melt:
•  Repair or replace the wiring harness for a possible short to ground.
•  Replace the fuse.
If the fuse is deterioration:
•  Replace the fuse.
If the fuse is normal:
•  Repair or replace the wiring harness for a possible open circuit.
Go to the next step.
6
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect the disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC from AFS control module using the M-MDS.
•  Switch the ignition to ON.
•  Perform the “DTC INSPECTION”.
•  Is the same DTC present?
Yes
Replace the AFS control module, then go to the next step.
(See AFS (ADAPTIVE FRONT LIGHTING SYSTEM) CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
7
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [AFS (ADAPTIVE FRONT LIGHTING SYSTEM)].)
No
DTC troubleshooting completed.