DTC U3003:16 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM]

id09021c930800

DESCRIPTION

Low voltage in power supply circuit (+B1)
DETECTION CONDITION
•  Keyless control module power supply circuit (+B1) voltage is 5.0 V—8.5 V for 5 s.
POSSIBLE CAUSE
•  Charging system malfunction
―  PCM DTC is stored
•  Battery malfunction
•  Generator malfunction
•  Keyless control module connector or terminals malfunction
•  Open circuit or short to ground in keyless control module power supply circuit
―  Short to ground in wiring harness between battery positive terminal and keyless control module terminal 1E
―  ROOM 15 A fuse malfunction
―  Open circuit in wiring harness between battery positive terminal and keyless control module terminal 1E
•  Keyless control module malfunction

Diagnostic Procedure

Step

Inspection

Action
1
CONFIRM PCM DTC
•  Perform the PCM DTC inspection using the M-MDS.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR 1.5, MZR 1.6].)
(See DTC TABLE [MZR 2.0, MZR 2.5].)
(See DTC TABLE [MZR 2.0 DISI i-stop].)
(See DTC TABLE [MZR 2.3 DISI Turbo].)
(See DTC TABLE [MZR-CD 2.2].)
(See DTC TABLE [SKYACTIV-G 2.0].)
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 [MZR 1.5, MZR 1.6].)
(See BATTERY RECHARGING [MZR 2.0, MZR 2.5].)
(See BATTERY RECHARGING [MZR 2.0 DISI i-stop].)
(See BATTERY RECHARGING [MZR 2.3 DISI Turbo].)
(See BATTERY RECHARGING [MZR-CD 2.2].)
(See BATTERY RECHARGING [SKYACTIV-G 2.0].)
(See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)
(See BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].)
(See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
(See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].)
(See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].)
(See BATTERY REMOVAL/INSTALLATION [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 Step 6.
(See GENERATOR REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)
(See GENERATOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].)
(See GENERATOR REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
(See GENERATOR REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].)
(See GENERATOR REMOVAL/INSTALLATION [MZR-CD 2.2].)
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
No
Go to the next step.
4
INSPECT KEYLESS CONTROL MODULE CONNECTOR AND TERMINALS
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the keyless 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 (+B1) FOR OPEN CIRCUIT OR SHORT TO GROUND
•  Keyless control module connector is disconnected.
•  Reconnect the negative battery cable.
•  Measure the voltage at the following terminal (wiring harness-side):
―  Keyless control module terminal 1E
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the ROOM 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.
•  Operate the advanced key to activate the keyless control module.
•  Clear the DTC from the keyless control module using the M-MDS.
•  Operate the advanced key to activate the keyless control module.
•  Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Replace the keyless control module, then go to the next step.
(See KEYLESS 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 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
No
DTC troubleshooting completed.