DTC U0184:00/U0187:00 [CONNECTIVITY MASTER UNIT]

id0902n7036300

Description
•  U0184:00
―  Communication error with tuner and amp unit (TAU)
•  U0187:00
―  Communication error with CD player or DVD/CD player
Detection condition
•  U0184:00
―  The connectivity master unit (CMU) cannot receive a CAN signal from the tuner and amp unit (TAU) for 5 s or more.
•  U0187:00
―  The connectivity master unit (CMU) cannot receive a CAN signal from the CD player or DVD/CD player for 5 s or more.
Fail-safe
•  U0184:00
―  Not applicable
•  U0187:00
―  Not applicable
Possible cause
•  Connectivity master unit (CMU) connector or terminal malfunction
•  Tuner and amp unit (TAU) connector or terminal malfunction
•  CD player or DVD/CD player connector or terminal malfunction (With CD player or DVD/CD player)
•  Connector C-16 connector or terminal malfunction
•  Connector C-25 connector or terminal malfunction
•  Connector C-40 connector or terminal malfunction (L.H.D.)
•  Connector C-41 connector or terminal malfunction (R.H.D.)
•  Connector C-42 connector or terminal malfunction
•  Short to power supply in wiring harness between the following terminals:
―  Connectivity master unit (CMU) terminal 2I—Tuner and amp unit (TAU) terminal 1AA
―  Connectivity master unit (CMU) terminal 2I—CD player or DVD/CD player terminal G (With CD player or DVD/CD player)
•  Short to ground in wiring harness between the following terminals:
―  Connectivity master unit (CMU) terminal 2J—Tuner and amp unit (TAU) terminal 1AB
―  Connectivity master unit (CMU) terminal 2J—CD player or DVD/CD player terminal H (With CD player or DVD/CD player)
•  Short between circuits in the following wiring harness:
―  Connectivity master unit (CMU) terminal 2I—Tuner and amp unit (TAU) terminal 1AA
―  Connectivity master unit (CMU) terminal 2J—Tuner and amp unit (TAU) terminal 1AB
―  Connectivity master unit (CMU) terminal 2I—CD player or DVD/CD player terminal G (With CD player or DVD/CD player)
―  Connectivity master unit (CMU) terminal 2J—CD player or DVD/CD player terminal H (With CD player or DVD/CD player)
•  Open circuit in wiring harness between the following terminals:
―  Connectivity master unit (CMU) terminal 2I—Tuner and amp unit (TAU) terminal 1AA
―  Connectivity master unit (CMU) terminal 2J—Tuner and amp unit (TAU) terminal 1AB
―  Connectivity master unit (CMU) terminal 2I—CD player terminal G (With CD player or DVD/CD player)
―  Connectivity master unit (CMU) terminal 2J—CD player terminal H (With CD player or DVD/CD player)
•  Open circuit in wiring harness between tuner and amp unit (TAU) terminal 2A and ground
•  Open circuit in wiring harness between CD player or DVD/CD player terminal A and ground (With CD player or DVD/CD player)
•  CD player or DVD/CD player power supply circuit malfunction (With CD player or DVD/CD player)
―  Without i-ELOOP:
•  Short to ground in wiring harness between MAIN 200 A fuse and CD player or DVD/CD player terminal Z
•  INTERIOR 15 A fuse malfunction
•  ROOM 25 A fuse malfunction
•  MAIN 200 A fuse malfunction
•  Open circuit in wiring harness between battery positive terminal and CD player or DVD/CD player terminal Z
―  With i-ELOOP:
•  Short to ground in wiring harness between ROOM 25 A fuse and CD player or DVD/CD player terminal Z
•  INTERIOR 15 A fuse malfunction
•  ROOM 25 A fuse malfunction
•  Open circuit in wiring harness between DC-DC converter (i-ELOOP) terminal 4A and CD player or DVD/CD player terminal Z
•  CD player or DVD/CD player malfunction (With CD player or DVD/CD player)
•  Tuner and amp unit (TAU) malfunction
•  Connectivity master unit (CMU) malfunction

Caution
•  When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals.

Diagnostic Procedure

Step

Inspection

Action
1
INSPECT FOR POWER SUPPLY-RELATED MALFUNCTION
•  Switch the ignition ON (engine off).
•  Perform the DTC inspection using the M-MDS.
•  Is the power supply or DC-DC converter-related DTC displayed?
Yes
Note
•  It may be affected by power supply-related or DC-DC converter malfunction.
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-G 1.5, SKYACTIV-G 2.0)].)
(See DTC TABLE [i-ELOOP].)
(See DTC TABLE [CONNECTIVITY MASTER UNIT].)
No
Go to the next step.
2
INSPECT FOR SHORT TO POWER SUPPLY IN CAN_H SIDE CIRCUIT OF LOCAL-CAN
•  Measure the voltage between connectivity master unit (CMU) terminal 2I (LOCAL-CAN CAN_H side) and body ground.
•  Is the voltage B+?
Yes
A short to power supply in CAN_H side circuit of LOCAL-CAN has occurred.
•  Go to Step 6.
No
Go to the next step.
3
INSPECT FOR SHORT TO GROUND IN CAN_L SIDE CIRCUIT OF LOCAL-CAN
•  Measure the voltage between connectivity master unit (CMU) terminal 2J (LOCAL-CAN CAN_L side) and body ground.
•  Is the voltage 0 V?
Yes
A short to ground in CAN_L side circuit of LOCAL-CAN has occurred.
•  Go to Step 7.
No
Go to the next step.
4
INSPECT BETWEEN LOCAL-CAN_L AND LOCAL-CAN_H SIDE CIRCUITS FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Measure the resistance between connectivity master unit (CMU) 2I and 2J terminals (wiring harness side).
•  Is the resistance approx. 60 ohms?
Yes
Go to the next step. (LOCAL-CAN is normal)
No
If the resistance is 0 ohm:
•  A short between circuits has occurred in LOCAL-CAN.
―  Go to Step 8.
If the resistance is 120 ohms:
•  An open circuit in the LOCAL-CAN has occurred.
―  Go to Step 9.
5
DETERMINE MALFUNCTIONING LOCATION
•  Connect the negative battery terminal.
•  Clear the DTC for the connectivity master unit (CMU) using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 12 s or more.
•  Retrieve the connectivity master unit (CMU) DTCs using the M-MDS.
•  Is there any of the following DTCs being displayed?
―  U0184:00
―  U0187:00
Yes
If U0184:00 is only displayed:
•  Go to Step 10.
If U0187:00 is only displayed:
•  Go to Step 11.
If all DTCs are displayed:
•  Replace the connectivity master unit (CMU), then go to Step 15.
No
Go to Step 16.
6
INSPECT WIRING HARNESS FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the following connectors:
―  Connectivity master unit (CMU)
―  Tuner and amp unit (TAU)
―  CD player or DVD/CD player (With CD player or DVD/CD player)
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the following terminals (wiring harness side).
―  Connectivity master unit (CMU) terminal 2I
―  Tuner and amp unit (TAU) terminal 1AA
―  CD player or DVD/CD player terminal G (With CD player or DVD/CD player)
•  Is the voltage 0 V?
Yes
Go to Step 14.
No
Refer to the wiring diagram and verify if there is a common connector between the following terminals:
•  Connectivity master unit (CMU) terminal 2I—Tuner and amp unit (TAU) terminal 1AA
•  Connectivity master unit (CMU) terminal 2I—CD player or DVD/CD player terminal G (With CD player or DVD/CD player)
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 power supply.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to power supply.
Go to Step 15.
7
INSPECT WIRING HARNESS FOR SHORT TO GROUND
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the following connectors:
―  Connectivity master unit (CMU)
―  Tuner and amp unit (TAU)
―  CD player or DVD/CD player (With CD player or DVD/CD player)
•  Inspect for continuity between the following terminals (wiring harness side) and body ground.
―  Connectivity master unit (CMU) terminal 2J
―  Tuner and amp unit (TAU) terminal 1AB
―  CD player or DVD/CD player terminal H (With CD player or DVD/CD player)
•  Is there continuity?
Yes
Refer to the wiring diagram and verify if there is a common connector between the following terminals:
•  Connectivity master unit (CMU) terminal 2J—Tuner and amp unit (TAU) terminal 1AB
•  Connectivity master unit (CMU) terminal 2J—CD player or DVD/CD player terminal H (With CD player or DVD/CD player)
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.
Go to Step 15.
No
Go to Step 14.
8
INSPECT WIRING HARNESS FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the following connectors:
―  Connectivity master unit (CMU)
―  Tuner and amp unit (TAU)
―  CD player or DVD/CD player (With CD player or DVD/CD player)
•  Inspect between the following terminals (wiring harness side) for continuity.
―  Connectivity master unit (CMU) terminals 2I and 2J
―  Tuner and amp unit (TAU) terminals 1AA and 1AB
―  CD player or DVD/CD player terminals G and H (With CD player or DVD/CD player)
•  Is there continuity?
Yes
Refer to the wiring diagram and verify if there is a common connector between the following terminals:
•  Connectivity master unit (CMU) terminal 2I—Tuner and amp unit (TAU) terminal 1AA
•  Connectivity master unit (CMU) terminal 2J—Tuner and amp unit (TAU) terminal 1AB
•  Connectivity master unit (CMU) terminal 2I—CD player or DVD/CD player terminal G (With CD player or DVD/CD player)
•  Connectivity master unit (CMU) terminal 2J—CD player or DVD/CD player terminal H (With CD player or DVD/CD player)
If there is a common connector:
•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short between circuits to determine the malfunctioning location.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has shorted between circuits.
Go to Step 15.
No
Go to Step 14.
9
INSPECT WIRING HARNESS FOR OPEN CIRCUIT
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the following connectors:
―  Connectivity master unit (CMU)
―  Tuner and amp unit (TAU)
―  CD player or DVD/CD player (With CD player or DVD/CD player)
•  Inspect the wiring harness for continuity between the following terminals (wiring harness side).
•  Connectivity master unit (CMU) terminal 2I—Tuner and amp unit (TAU) terminal 1AA
•  Connectivity master unit (CMU) terminal 2J—Tuner and amp unit (TAU) terminal 1AB
•  Connectivity master unit (CMU) terminal 2I—CD player or DVD/CD player terminal G (With CD player or DVD/CD player)
•  Connectivity master unit (CMU) terminal 2J—CD player or DVD/CD player terminal H (With CD player or DVD/CD player)
•  Is there continuity?
Yes
Go to Step 14.
No
Refer to the wiring diagram and verify if there is a common connector between the following terminals:
•  Connectivity master unit (CMU) terminal 2I—Tuner and amp unit (TAU) terminal 1AA
•  Connectivity master unit (CMU) terminal 2J—Tuner and amp unit (TAU) terminal 1AB
•  Connectivity master unit (CMU) terminal 2I—CD player or DVD/CD player terminal G (With CD player or DVD/CD player)
•  Connectivity master unit (CMU) terminal 2J—CD player or DVD/CD player terminal H (With CD player or DVD/CD player)
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 Step 15.
10
INSPECT TUNER AND AMP UNIT (TAU) RELATED-WIRING HARNESS FOR OPEN CIRCUIT
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the tuner and amp unit (TAU) connector.
•  Inspect the wiring harness for continuity between tuner and amp unit (TAU) terminal 2A and ground.
•  Is there continuity?
Yes
Replace the tuner and amp unit (TAU), then go to Step 15.
(See TUNER AND AMP UNIT (TAU) REMOVAL/INSTALLATION.)
No
Refer to the wiring diagram and verify if there is a common connector between tuner and amp unit (TAU) terminal 2A and 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 Step 15.
11
INSPECT CD PLAYER OR DVD/CD PLAYER RELATED-WIRING HARNESS FOR OPEN CIRCUIT
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the CD player or DVD/CD player connector.
•  Inspect the wiring harness for continuity between CD player or DVD/CD player terminal A (wiring harness side) and ground.
•  Is there continuity?
Yes
Without i-ELOOP:
•  Go to the next step.
With i-ELOOP:
•  Go to Step 13.
No
Refer to the wiring diagram and verify if there is a common connector between CD player or DVD/CD player terminal A and 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 Step 15.
12
VERIFY CD PLAYER OR DVD/CD PLAYER POWER SUPPLY VOLTAGE
•  Verify that the CD player or DVD/CD player connector is disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at CD player or DVD/CD player terminal Z (wiring harness side).
•  Is the voltage B+?
Yes
Replace the CD player or DVD/CD player, then go to Step 15.
(See CD PLAYER REMOVAL/INSTALLATION.)
(See DVD/CD PLAYER REMOVAL/INSTALLATION.)
No
Inspect the INTERIOR 15 A fuse, ROOM 25 A fuse and MAIN 200 A fuse.
•  Any fuse is blown:
―  Refer to the wiring diagram and verify if there is a common connector between MAIN 200 A fuse and CD player or DVD/CD player terminal Z.
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 if there is a common connector between battery positive terminal and CD player or DVD/CD player terminal Z.
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 Step 15.
13
VERIFY CD PLAYER OR DVD/CD PLAYER POWER SUPPLY VOLTAGE
•  Verify that the CD player or DVD/CD player connector is disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at CD player or DVD/CD player terminal Z (wiring harness side).
•  Is the voltage B+?
Yes
Replace the CD player or DVD/CD player, then go to Step 15.
(See CD PLAYER REMOVAL/INSTALLATION.)
(See DVD/CD PLAYER REMOVAL/INSTALLATION.)
No
Disconnect the service plug.
(See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].)
Inspect the INTERIOR 15 A fuse and ROOM 25 A fuse.
•  Any fuse is blown:
―  Refer to the wiring diagram and verify if there is a common connector between ROOM 25 A fuse and CD player or DVD/CD player terminal Z.
If there is a common connector:
•  Determine the malfunctioning location by inspecting the common connector and terminals for corrosion, damage, or disconnection and by inspecting the DC-DC converter (i-ELOOP) terminal 4A-related 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 if there is a common connector between DC-DC converter (i-ELOOP) terminal 4A and CD player or DVD/CD player terminal Z.
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 Step 15.
14
PERFORM DTC INSPECTION AND DETERMINE MALFUNCTIONING LOCATION
•  Always reconnect all disconnected connectors.
•  Connect the negative battery terminal.
•  Clear the DTC for the connectivity master unit (CMU) using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 12 s or more.
•  Retrieve the connectivity master unit (CMU) DTCs using the M-MDS.
•  Is there any of the following DTCs being displayed?
―  U0184:00
―  U0187:00
Yes
If U0184:00 is only displayed:
•  Replace the tuner and amp unit (TAU), then go to the next step.
If U0187:00 is only displayed:
•  Replace the CD player or DVD/CD player, then go to the next step.
If all DTCs are displayed:
•  Replace the connectivity master unit (CMU), then go to the next step.
No
Go to Step 16.
15
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Connect the negative battery terminal.
•  Clear the DTC for the connectivity master unit (CMU) using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 12 s or more.
•  Retrieve the connectivity master unit (CMU) DTCs using the M-MDS.
•  Is the same Pending DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the connectivity master unit (CMU).
Go to the next step.
No
Go to the next step.
16
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 [CONNECTIVITY MASTER UNIT].)
No
DTC troubleshooting completed.