DTC U0187:00 [CONNECTIVITY MASTER UNIT (TYPE-A)]

id1602a8010000

Description

Communication error with CD player or DVD/CD player
Detection condition
•  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
Not applicable
Possible cause
•  Connectivity master unit (CMU) connector or terminal malfunction
•  CD player or DVD/CD player connector or terminal malfunction
•  Short to power supply in wiring harness between connectivity master unit (CMU) terminal 2I—CD player or DVD/CD player terminal G
•  Short to ground in wiring harness between connectivity master unit (CMU) terminal 2J—CD player or DVD/CD player terminal H
•  Short between circuits in the following wiring harness:
―  Connectivity master unit (CMU) terminal 2I—CD player or DVD/CD player terminal G
―  Connectivity master unit (CMU) terminal 2J—CD player or DVD/CD player terminal H
•  Connector C-58 connector or terminal malfunction
•  Open circuit in wiring harness between the following terminals:
―  Connectivity master unit (CMU) terminal 2I—Connector C-58
―  Connectivity master unit (CMU) terminal 2J—Connector C-58
―  CD player or DVD/CD player terminal G—Connector C-58
―  CD player or DVD/CD player terminal H—Connector C-58
•  Open circuit in wiring harness between CD player or DVD/CD player terminal A and ground
•  CD player or DVD/CD player power supply circuit malfunction
―  Short to ground in wiring harness between MAIN 200 A fuse and CD player or DVD/CD player terminal Z
―  MAIN 200 A fuse malfunction
―  INTERIOR1 15 A fuse malfunction
―  ROOM 25 A fuse malfunction
―  Open circuit in wiring harness between battery positive terminal and CD player or DVD/CD player terminal Z
•  CD player or DVD/CD player 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.
(Refer to the [ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G)]] in the workshop manual)
(Refer to the [ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D)]] in the workshop manual)
•  Is the power supply-related DTC displayed?
Yes
Note
•  It may be affected by power supply-related malfunction.
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(Refer to the [DTC TABLE [PCM (SKYACTIV-G)]] in the workshop manual)
(Refer to the [DTC TABLE [PCM (SKYACTIV-D)]] in the workshop manual)
(See DTC TABLE [CONNECTIVITY MASTER UNIT (TYPE-A) (E)].)
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 5.
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 6.
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.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual)
•  Measure the resistance between connectivity master unit (CMU) 2I and 2J terminals (vehicle wiring harness side).
•  Is the resistance approx. 60 ohms?
Yes
Go to Step 9. (LOCAL-CAN is normal)
No
If the resistance is 0 ohm:
•  A short between circuits has occurred in LOCAL-CAN.
―  Go to Step 7.
If the resistance is 120 ohms:
•  An open circuit in the LOCAL-CAN has occurred.
―  Go to Step 8.
5
INSPECT WIRING HARNESS FOR SHORT TO POWER SUPPLY
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual)
•  Disconnect the following connectors:
―  Connectivity master unit (CMU)
―  CD player or DVD/CD player
•  Connect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual)
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the following terminals (vehicle wiring harness side).
―  Connectivity master unit (CMU) terminal 2I
―  CD player or DVD/CD player terminal G
•  Is the voltage 0 V?
Yes
Go to Step 10.
No
Refer to the wiring diagram and verify if there is a common connector between connectivity master unit (CMU) terminal 2I and CD player or DVD/CD player terminal G.
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 location.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to power supply.
Go to Step 12.
6
INSPECT WIRING HARNESS FOR SHORT TO GROUND
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual)
•  Disconnect the following connectors:
―  Connectivity master unit (CMU)
―  CD player or DVD/CD player
•  Inspect for continuity between the following terminals (vehicle wiring harness side) and body ground.
―  Connectivity master unit (CMU) terminal 2J
―  CD player or DVD/CD player terminal H
•  Is there continuity?
Yes
Refer to the wiring diagram and verify if there is a common connector between connectivity master unit (CMU) terminal 2J and CD player or DVD/CD player terminal H.
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 location.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
Go to Step 12.
No
Go to Step 10.
7
INSPECT WIRING HARNESS FOR SHORT BETWEEN CIRCUITS
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual)
•  Disconnect the following connectors:
―  Connectivity master unit (CMU)
―  CD player or DVD/CD player
•  Inspect between the following terminals (vehicle wiring harness side) for continuity.
―  Connectivity master unit (CMU) terminals 2I and 2J
―  CD player or DVD/CD player terminals G and H
•  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—CD player or DVD/CD player terminals G
•  Connectivity master unit (CMU) terminal 2J—CD player or DVD/CD player terminals H
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 location.
If there is no common connector:
•  Repair or replace the wiring harness which has shorted between circuits.
Go to Step 12.
No
Go to Step 10.
8
INSPECT WIRING HARNESS FOR OPEN CIRCUIT
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual)
•  Disconnect the following connectors:
―  Connectivity master unit (CMU)
―  CD player or DVD/CD player
―  Connector C-58
•  Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side).
―  Connectivity master unit (CMU) terminal 2I—Connector C-58
―  Connectivity master unit (CMU) terminal 2J—Connector C-58
―  CD player or DVD/CD player terminal G—Connector C-58
―  CD player or DVD/CD player terminal H—Connector C-58
•  Is there continuity?
Yes
Go to Step 10.
No
Refer to the wiring diagram and verify if there is a common connector between the following terminals:
•  Connectivity master unit (CMU) terminal 2I—Connector C-58
•  Connectivity master unit (CMU) terminal 2J—Connector C-58
•  CD player or DVD/CD player terminal G—Connector C-58
•  CD player or DVD/CD player terminal H—Connector C-58
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 location.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 12.
9
INSPECT CD PLAYER OR DVD/CD PLAYER RELATED-WIRING HARNESS FOR OPEN CIRCUIT
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual)
•  Disconnect the CD player or DVD/CD player connector.
•  Inspect the wiring harness for continuity between CD player or DVD/CD player terminal A (vehicle wiring harness side) and ground.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness which has an open circuit, then go to Step 12.
10
VERIFY CD PLAYER OR DVD/CD PLAYER POWER SUPPLY VOLTAGE
•  Verify that the CD player or CD/DVD player connector is disconnected.
•  Connect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual)
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at CD player or DVD/CD player terminal Z (vehicle wiring harness side).
•  Is the voltage B+?
Yes
Inspect the MAIN 200 A fuse, INTERIOR1 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 MAIN 200 A fuse and CD player or DVD/CD player terminal Z.
If there is a common connector:
•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location.
•  Repair or replace the malfunctioning location.
If there is no common connector:
•  Repair or replace the wiring harness which is shorted 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:
•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location.
•  Repair or replace the malfunctioning location.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
No
Go to Step 13.
11
VERIFY IF MALFUNCTIONING LOCATION IS CD PLAYER OR DVD/CD PLAYER DEPENDING ON REPEATABILITY
•  Always reconnect all disconnected connectors.
•  Connect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual)
•  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.
Yes
Replace the CD player or DVD/CD player, then go to the next step.
(Refer to the [CD PLAYER REMOVAL/INSTALLATION] in the workshop manual)
(Refer to the [DVD/CD PLAYER REMOVAL/INSTALLATION] in the workshop manual)
No
Go to Step 13.
12
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Connect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual)
•  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).
(Refer to the [CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION] in the workshop manual)
Go to the next step.
No
Go to the next step.
13
VERIFY OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [CONNECTIVITY MASTER UNIT (TYPE-A) (E)].)
No
DTC troubleshooting completed.