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	• 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 ? INTERIOR2 15 A fuse malfunction ? ROOM 25 A fuse malfunction ? Open circuit in wiring harness between battery positive terminal 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 terminal C and center display terminal 1G • Center display malfunction • Connectivity master unit (CMU) malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY PCM DTCs • Retrieve the PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
1		No	Go to the next step.
2	INSPECT BATTERY • Inspect the battery. (See BATTERY INSPECTION.) • 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.) (See BATTERY REMOVAL/INSTALLATION.)
3	INSPECT GENERATOR • Inspect the generator. (See GENERATOR INSPECTION [WITHOUT i-ELOOP (SKYACTIV-G 2.5T)].) (See GENERATOR INSPECTION [WITH i-ELOOP (SKYACTIV-G 2.5T)].) • Is the generator normal?	Yes	Go to the next step.
3		No	Replace the generator, then go to Step 8. (See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (SKYACTIV-G 2.5T)].) (See GENERATOR REMOVAL/INSTALLATION [WITH i-ELOOP (SKYACTIV-G 2.5T)].)
4	INSPECT CENTER DISPLAY CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • 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 • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Measure the voltage at center display terminal 1H (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
5		No	Inspect the INTERIOR2 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 center display terminal 1H. 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. • 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 positive battery terminal and center display terminal 1H. 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 8.
6	VERIFY CENTER DISPLAY ACC POWER SUPPLY VOLTAGE • Switch the ignition to ACC. • 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: • 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. • 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 terminal C and center display terminal 1G. 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 8.
7	VERIFY IF MALFUNCTIONING LOCATION IS CENTER DISPLAY DEPENDING ON REPEATABILITY • 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. • Retrieve the connectivity master unit (CMU) DTCs 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. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • 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. • Retrieve the connectivity master unit (CMU) DTCs 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 or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [CONNECTIVITY MASTER UNIT].)
9		No	DTC troubleshooting completed.