DTC B108E:1C [CONNECTIVITY MASTER UNIT]

id0902n7103400

Description

Low power supply voltage input to center display

Detection condition

•  The connectivity master unit (CMU) detected any of the following conditions for 5 s or more with the ignition switched ON (engine off or on).

―  TFT LCD driver voltage 3.8 V or less

―  LED drive voltage 14.0 V or less

―  Touch panel IC voltage 3.9 V or less

Fail-safe function

•  Stops operation of the center display.

Possible cause

•  DTCs are stored in the PCM.

•  Battery malfunction

•  Generator malfunction

•  Center display connector or terminal malfunction

•  Center display B+ power supply circuit malfunction

―  Short to ground in wiring harness between MAIN 200 A fuse and center display terminal 1H

―  ROOM 15 A fuse malfunction

―  MAIN 200 A fuse malfunction

―  Open circuit in wiring harness between battery and center display terminal 1H

•  Center display ACC power supply circuit malfunction

―  Short to ground in wiring harness between MIRROR 7.5 A fuse and center display terminal 1G

―  MIRROR 7.5 A fuse malfunction

―  Open circuit in wiring harness between ACC relay and center display terminal 1G

•  Center display malfunction

•  Connectivity master unit (CMU) malfunction

Description	Low power supply voltage input to center display
Detection condition	• The connectivity master unit (CMU) detected any of the following conditions for 5 s or more with the ignition switched ON (engine off or on). ― TFT LCD driver voltage 3.8 V or less ― LED drive voltage 14.0 V or less ― Touch panel IC voltage 3.9 V or less
Fail-safe function	• Stops operation of the center display.
Possible cause	• DTCs are stored in the PCM. • Battery malfunction • Generator malfunction • Center display connector or terminal malfunction • Center display B+ power supply circuit malfunction ― Short to ground in wiring harness between MAIN 200 A fuse and center display terminal 1H ― ROOM 15 A fuse malfunction ― MAIN 200 A fuse malfunction ― Open circuit in wiring harness between battery and center display terminal 1H • Center display ACC power supply circuit malfunction ― Short to ground in wiring harness between MIRROR 7.5 A fuse and center display terminal 1G ― MIRROR 7.5 A fuse malfunction ― Open circuit in wiring harness between ACC relay and center display terminal 1G • Center display malfunction • Connectivity master unit (CMU) malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY PCM DTCs • Perform the DTC inspection for the PCM using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) (See ON-BOARD DIAGNOSTIC TEST [MZR 1.6].) • Is a DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See DTC TABLE [SKYACTIV-D 1.5].) (See DTC TABLE [SKYACTIV-D 2.2].) (See DTC TABLE [MZR 1.6].)
1		No	Go to the next step.
2	INSPECT BATTERY • Inspect the battery. (See BATTERY INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See BATTERY INSPECTION [SKYACTIV-D 1.5].) (See BATTERY INSPECTION [SKYACTIV-D 2.2].) (See BATTERY INSPECTION [MZR 1.6].) • Is the battery normal?	Yes	Go to the next step.
2		No	Recharge or replace the battery, then go to Step 8. (See BATTERY RECHARGING [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See BATTERY RECHARGING [SKYACTIV-D 1.5].) (See BATTERY RECHARGING [SKYACTIV-D 2.2].) (See BATTERY RECHARGING [MZR 1.6].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 1.6].)
3	INSPECT GENERATOR • Inspect the generator. (See GENERATOR INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-ELOOP)].) (See GENERATOR INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITH i-ELOOP)].) (See GENERATOR INSPECTION [SKYACTIV-D 1.5].) (See GENERATOR INSPECTION [SKYACTIV-D 2.2 (WITHOUT i-ELOOP)].) (See GENERATOR INSPECTION [SKYACTIV-D 2.2 (WITH i-ELOOP)].) (See GENERATOR INSPECTION [MZR 1.6].) • Is the generator normal?	Yes	Go to the next step.
3		No	Replace the generator, then go to Step 8. (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-ELOOP)].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITH i-ELOOP)].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2 (WITHOUT i-ELOOP)].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2 (WITH i-ELOOP)].) (See GENERATOR REMOVAL/INSTALLATION [MZR 1.6].)
4	INSPECT CENTER DISPLAY CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect the center display 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.
4		No	Repair or replace the connector, then go to Step 8.
5	VERIFY CENTER DISPLAY B+ POWER SUPPLY VOLTAGE • Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Measure the voltage at center display terminal 1H (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
5		No	Install the ROOM 15 A fuse and MAIN 200 A fuse. • If any fuse is blown: ― Refer to the wiring diagram and verify if there is a common connector between MAIN 200 A fuse and center display terminal 1H. 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. • If any fuse is damaged: ― Replace the fuse. • If the fuses are normal: ― Refer to the wiring diagram and verify if there is a common connector between positive battery terminal and center display terminal 1H. 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. Go to Step 8.
6	VERIFY CENTER DISPLAY ACC POWER SUPPLY VOLTAGE • Measure the voltage at center display terminal 1G (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
6		No	Inspect the MIRROR 7.5 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify if there is a common connector between MIRROR 7.5 A fuse and center display terminal 1G. 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. • If the fuse is damaged: ― Replace the fuse. • If the fuse is normal: ― Refer to the wiring diagram and verify if there is a common connector between ACC relay and center display terminal 1G. 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. Go to Step 8.
7	PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING LOCATION IS CENTER DISPLAY • Clear the DTC for the connectivity master unit (CMU) using the M-MDS. (See CLEARING DTC [CONNECTIVITY MASTER UNIT].) • Switch the ignition ON (engine off or on) and wait for 12 s or more. • Perform the DTC inspection for the connectivity master unit (CMU) using the M-MDS. (See DTC INSPECTION [CONNECTIVITY MASTER UNIT].) • Is the same DTC displayed?	Yes	Replace the center display, then go to the next step. (See CENTER DISPLAY REMOVAL/INSTALLATION.)
7		No	Go to Step 9.
8	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Always reconnect all disconnected connectors. • Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Clear the DTC for the connectivity master unit (CMU) using the M-MDS. (See CLEARING DTC [CONNECTIVITY MASTER UNIT].) • Switch the ignition ON (engine off or on) and wait for 12 s or more. • Perform the DTC inspection for the connectivity master unit (CMU) using the M-MDS. (See DTC INSPECTION [CONNECTIVITY MASTER UNIT].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the connectivity master unit (CMU). (See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION.) Go to the next step.
8		No	Go to the next step.
9	VERIFY IF 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].)
9		No	DTC troubleshooting completed.