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Diagnostic Procedure

DTC U0184:00 DIAGNOSTIC PROCEDURE

Step Inspection Action
1 INSPECT FOR POWER SUPPLY-RELATED MALFUNCTION Yes
NOTE:
  • It may be affected by power supply-related malfunction.
Repair the malfunctioning location according to the applicable DTC troubleshooting.(See DTC TABLE [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)] .)(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 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. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • 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. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Disconnect the following connectors:
    • Connectivity master unit (CMU)
      • Tuner and amp unit (TAU)
  • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • 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
      • Tuner and amp unit (TAU) terminal 2O
  • 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 the following terminals:
  • Connectivity master unit (CMU) terminal 2I-Tuner and amp unit (TAU) terminal 2O

    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 11.
6 INSPECT WIRING HARNESS FOR SHORT TO GROUND
  • Switch the ignition off.
  • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Disconnect the following connectors:
    • Connectivity master unit (CMU)
      • Tuner and amp unit (TAU)
  • Inspect for continuity between the following terminals (vehicle wiring harness side) and body ground.
    • Connectivity master unit (CMU) terminal 2J
      • Tuner and amp unit (TAU) terminal 2Q
  • 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 2Q

    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 11.
No Go to Step 10.
7 INSPECT WIRING HARNESS FOR SHORT BETWEEN CIRCUITS
  • Switch the ignition off.
  • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Disconnect the following connectors:
    • Connectivity master unit (CMU)
      • Tuner and amp unit (TAU)
  • Inspect between the following terminals (vehicle wiring harness side) for continuity.
    • Connectivity master unit (CMU) terminals 2I and 2J
      • Tuner and amp unit (TAU) terminals 2O and 2Q
  • 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 2O
  • Connectivity master unit (CMU) terminal 2J-Tuner and amp unit (TAU) terminal 2Q

    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 11.
No Go to Step 10.
8 INSPECT WIRING HARNESS FOR OPEN CIRCUIT
  • Switch the ignition off.
  • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Disconnect the following connectors:
    • Connectivity master unit (CMU)
    • Tuner and amp unit (TAU)
      • 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
    • Tuner and amp unit (TAU) terminal 2O- Connector C-58
      • Tuner and amp unit (TAU) terminal 2Q-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
  • Tuner and amp unit (TAU) terminal 2O-Connector C-58
  • Tuner and amp unit (TAU) terminal 2Q-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 11.
9 INSPECT TUNER AND AMP UNIT (TAU) RELATED-WIRING HARNESS FOR OPEN CIRCUIT
  • Switch the ignition off.
  • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Disconnect the tuner and amp unit (TAU) connector.
  • Inspect for continuity between the following terminals (wiring harness-side):
    • Tuner and amp unit (TAU) terminal 2W-Body 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 11.
10 VERIFY IF MALFUNCTIONING LOCATION IS TUNER AND AMP UNIT (TAU) DEPENDING ON REPEATABILITY Yes Replace the tuner and amp unit (TAU), then go to the next step.
(See TUNER AND AMP UNIT (TAU) REMOVAL/INSTALLATION .)
No Go to Step 12.
11 VERIFY THAT REPAIRS HAVE BEEN COMPLETED Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
12 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] .)
No DTC troubleshooting completed.
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