DTC U3003:1C [RETRACTABLE HARDTOP CONTROL MODULE]

id0902r4079800

Description

Retractable hardtop control module low power supply voltage input
Detection condition
•  The retractable hardtop control module power supply circuit voltage of less than 10 V is detected with the ignition switched ON (engine off or on).
Fail-safe
•  Stops retractable hardtop operation
Possible cause
•  PCM stores DTCs
•  Battery malfunction
•  Generator malfunction
•  Retractable hardtop control module connector or terminal malfunction
•  Retractable hardtop control module power supply circuit malfunction
―  Short to ground in wiring harness between DC-DC converter (i-ELOOP) terminal 4A and retractable hardtop control module terminal 1F
―  ROOM 25 A fuse malfunction
―  INTERIOR 15 A fuse malfunction
―  Open circuit in wiring harness between DC-DC converter (i-ELOOP) terminal 4A and retractable hardtop control module terminal 1F
•  Retractable hardtop control module malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY OTHER RETRACTABLE HARDTOP CONTROL MODULE DTCs
•  Clear the DTC for the retractable hardtop control module using the M-MDS.
•  Retrieve the retractable hardtop control module DTCs using the M-MDS.
•  Is the DTCs U3000:44/U3000:45/U3000:49 displayed?
Yes
Replace the retractable hardtop control module, then go to Step 7.
(See RETRACTABLE HARDTOP CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
2
VERIFY PCM DTCs
•  Retrieve the PCM DTCs using the M-MDS.
•  Are any DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-G 1.5, SKYACTIV-G 2.0)].)
No
Go to the next step.
3
INSPECT BATTERY
•  Inspect the battery.
•  Is the battery normal?
Yes
Go to the next step.
No
Recharge or replace the battery, then go to Step 7.
(See BATTERY RECHARGING.)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
4
INSPECT GENERATOR
•  Inspect the generator.
•  Is the generator normal?
Yes
Go to the next step.
No
Replace the generator, then go to Step 7.
(See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (SKYACTIV-G 1.5, SKYACTIV-G 2.0)].)
(See GENERATOR REMOVAL/INSTALLATION [WITH i-ELOOP (SKYACTIV-G 1.5, SKYACTIV-G 2.0)].)
5
INSPECT RETRACTABLE HARDTOP CONTROL MODULE CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the retractable hardtop control module connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector, then go to Step 7.
6
VERIFY RETRACTABLE HARDTOP CONTROL MODULE POWER SUPPLY VOLTAGE
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the following terminal (wiring harness-side):
―  Retractable hardtop control module terminal 1F
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the ROOM 25 A fuse, INTERIOR 15 A fuse.
•  Any fuse is blown:
―  Refer to the wiring diagram and verify whether or not there is a common connector between the following:
•  Retractable hardtop control module terminal 1F and DC-DC converter (i-ELOOP) terminal 4A
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.
•  Any fuse is damaged:
―  Replace the fuse.
•  All fuses are normal:
―  Refer to the wiring diagram and verify whether or not there is a common connector between the following:
•  Retractable hardtop control module terminal 1F and DC-DC converter (i-ELOOP) terminal 4A
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.
7
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Connect the negative battery terminal.
•  Clear the DTC for the retractable hardtop control module using the M-MDS.
•  Retrieve the retractable hardtop control module DTCs using the M-MDS.
•  Is the same Pending DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the retractable hardtop control module.
Go to the next step.
No
Go to the next step.
8
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [RETRACTABLE HARDTOP CONTROL MODULE].)
No
DTC troubleshooting completed.