DTC B1252:1D [CONNECTIVITY MASTER UNIT]

id0902n7105200

Description

Auxiliary jack/USB port/SD card slot hub circuit malfunction

Detection condition

•  The connectivity master unit (CMU) detects over-current (550 mA or more) in auxiliary jack/USB port/SD card slot hub circuit with the ignition switched ON (engine off or on).

Fail-safe function

Not applicable

Possible cause

•  Auxiliary jack/USB port/SD card slot hub connector or terminal malfunction

•  Connectivity master unit (CMU) connector or terminal malfunction

•  Short to ground in wiring harness between connectivity master unit (CMU) terminal 4C and auxiliary jack/USB port/SD card slot hub terminal 2C

•  Auxiliary jack/USB port/SD card slot hub malfunction

•  Connectivity master unit (CMU) malfunction

Description	Auxiliary jack/USB port/SD card slot hub circuit malfunction
Detection condition	• The connectivity master unit (CMU) detects over-current (550 mA or more) in auxiliary jack/USB port/SD card slot hub circuit with the ignition switched ON (engine off or on).
Fail-safe function	Not applicable
Possible cause	• Auxiliary jack/USB port/SD card slot hub connector or terminal malfunction • Connectivity master unit (CMU) connector or terminal malfunction • Short to ground in wiring harness between connectivity master unit (CMU) terminal 4C and auxiliary jack/USB port/SD card slot hub terminal 2C • Auxiliary jack/USB port/SD card slot hub malfunction • Connectivity master unit (CMU) malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT AUXILIARY JACK/USB PORT/SD CARD SLOT HUB 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 auxiliary jack/USB port/SD card slot hub 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.
1		No	Repair or replace the connector, then go to Step 5.
2	INSPECT CONNECTIVITY MASTER UNIT (CMU) CONNECTOR CONDITION • Disconnect the connectivity master unit (CMU) 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.
2		No	Repair or replace the connector, then go to Step 5.
3	INSPECT AUXILIARY JACK/USB PORT/SD CARD SLOT HUB CIRCUIT FOR SHORT TO GROUND • Verify that the auxiliary jack/USB port/SD card slot hub connector and the connectivity master unit (CMU) connector are disconnected. • Inspect for continuity between auxiliary jack/USB port/SD card slot hub terminal 2C (wiring harness-side) and body ground. • Is there continuity?	Yes	Refer to the wiring diagram and verify if there is a common connector between connectivity master unit (CMU) terminal 4C and auxiliary jack/USB port/SD card slot hub terminal 2C. 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. Go to Step 5.
3		No	Go to the next step.
4	PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING LOCATION IS AUXILIARY JACK/USB PORT/SD CARD SLOT HUB • 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 7 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 auxiliary jack/USB port/SD card slot hub, then go to the next step. (See AUXILIARY JACK/USB PORT/SD CARD SLOT HUB REMOVAL/INSTALLATION.)
4		No	Go to Step 6.
5	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 7 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.
5		No	Go to the next step.
6	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].)
6		No	DTC troubleshooting completed.