PROCEDURES FOR DETERMINING THE LOCATION OF A MALFUNCTION [MULTIPLEX COMMUNICATION SYSTEM]

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System Wiring Diagram

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PCM

1. Inspect the display of DTC U0101 (ATX only), U0121 and/or U0155, using the M-MDS.

(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

2. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status			Malfunction location
Module	TCM (ATX only)	DSC HU/CM	Instrument cluster	Malfunction location
PCM	—	—	—	• Wiring harness A • PCM
	—	×	×	• Wiring harness B • TCM (ATX only)
	×	—	×	• Wiring harness D • DSC HU/CM
	×	—	—	• Wiring harness C
	×	×	—	• Wiring harness E • BCM • Wiring harness F • Wiring harness H • Wiring harness J • Wiring harness K • Wiring harness M • Instrument cluster

TCM (ATX only)

1. Inspect the display of DTC U0100, U0121, U0140 and/or U0415 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

2. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status			Malfunction location
Module	PCM	DSC HU/CM	Instrument cluster	Malfunction location
TCM (ATX only)	—	—	—	• Wiring harness B • TCM (ATX only)
	—	×	×	• Wiring harness A • PCM
	×	—	×	• Wiring harness D • DSC HU/CM
	×	—	—	• Wiring harness C
	×	×	—	• Wiring harness E • BCM • Wiring harness F • Wiring harness H • Wiring harness J • Wiring harness K • Wiring harness M • Instrument cluster

DSC HU/CM

1. Inspect the display of DTC U0100, U0101 (ATX only), U0114, U0140 (MTX only), U1900 and/or U2023 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

Caution

• DTC U2023 may not be cleared during engine starting even if DTC clearing is done using the M-MDS. When clearing DTC U2023, execute with the ignition switch in the ON position (Engine off).

Note

• You may want to check which unit is malfunctioning according to Freeze Frame Data. "Electrical" > "IC Service Function" > "Freeze Frame Data".This function is supported on IDS, not PDS.

2. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status				Malfunction location
Module	PCM	TCM (ATX only)	4WD control module	BCM	Malfunction location
DSC HU/CM	—	—	—	—	• Wiring harness D • DSC HU/CM
	—	×	×	×	• Wiring harness A • PCM
	×	—	×	×	• Wiring harness B • TCM (ATX only)
	—	—	×	×	• Wiring harness C
	×	×	—	×	• Wiring harness G • 4WD control module
	×	×	—	—	• Wiring harness E • BCM • Wiring harness F
	×	×	×	—	• Wiring harness H • Wiring harness J • BCM

4WD Control Module

1. Inspect the display of DTC U0100, U0101 (ATX only), U0121, U0140 (MTX only) and/or U0155 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

2. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status					Malfunction location
Module	PCM	TCM (ATX only)	DSC HU/CM	BCM	Instrument cluster	Malfunction location
4WD Control Module	—	—	—	—	—	• Wiring harness G • 4WD Control Module • BCM
	—	×	×	×	×	• Wiring harness A • PCM
	×	—	×	×	×	• Wiring harness B • TCM (ATX only)
	—	—	×	×	×	• Wiring harness C
	×	×	—	×	×	• Wiring harness D • DSC HU/CM
	—	—	—	×	×	• Wiring harness E • Wiring harness F
	×	×	×	×	—	• Wiring harness K • Wiring harness M • Instrument cluster

BCM

1. Inspect the display of DTC U0028 and/or U0100 using the M-MDS.

(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

2. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status				Malfunction location
Module	PCM	DSC HU/CM	Keyless Control Module (with advanced keyless)	Instrument cluster	Malfunction location
BCM	—	—	—	—	• BCM
	—	×	×	×	• Wiring harness A • Wiring harness C • PCM
	×	—	×	×	• Wiring harness D • DSC HU/CM
	—	—	×	×	• Wiring harness E • Wiring harness F • Wiring harness H • Wiring harness J
	×	×	—	×	• Wiring harness L • Keyless Control Module (with advanced keyless)
	×	×	×	—	• Wiring harness M • Instrument cluster

SAS Control Module

1. Inspect the display of DTC U0155 using the M-MDS.

(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

2. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status	Malfunction location
Module	Instrument cluster	Malfunction location
SAS control module	—	• SAS control module • Wiring harness I • Wiring harness J • BCM • Wiring harness K • Wiring harness M • Instrument cluster

Keyless Control Module (with advanced keyless)

1. Inspect the display of DTC U0100, U0140, U0323 and/or U2023 using the M-MDS.

(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

Caution

• DTC U2023 may not be cleared during engine starting even if DTC clearing is done using the M-MDS. When clearing DTC U2023, execute with the ignition switch in the ON position (Engine off).

Note

• You may want to check which unit is malfunctioning according to Freeze Frame Data. "Electrical" > "IC Service Function" > "Freeze Frame Data".This function is supported on IDS, not PDS.

2. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status			Malfunction location
Module	PCM	BCM	Instrument cluster	Malfunction location
Keyless Control Module (with advanced keyless)	—	—	—	• Wiring harness L • Keyless Control Module (with advanced keyless)
	—	×	×	• Wiring harness A • Wiring harness C • Wiring harness E • BCM • Wiring harness F • Wiring harness H • Wiring harness J • PCM
	—	—	×	• Wiring harness K • BCM
	×	—	×	• BCM
	×	×	—	• Wiring harness M • Instrument cluster

Instrument Cluster

1. Inspect the display of DTC U0100, U0101 (ATX only), U0114, U0121, U0140, U0151 U0214 and/or U2023 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

Caution

• DTC U2023 may not be cleared during engine starting even if DTC clearing is done using the M-MDS. When clearing DTC U2023, execute with the ignition switch in the ON position (Engine off).

Note

• You may want to check which unit is malfunctioning according to Freeze Frame Data. "Electrical" > "IC Service Function" > "Freeze Frame Data".This function is supported on IDS, not PDS.

2. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status							Malfunction location
Module	PCM	TCM (ATX only)	DSC HU/CM	4WD control module	SAS control module	BCM	Keyless Control Module (with advanced keyless)	Malfunction location
Instrument cluster	—	—	—	—	—	—	—	• Wiring harness M • Instrument cluster
	—	×	×	×	×	×	×	• Wiring harness A • PCM
	—	—	×	×	×	×	×	• Wiring harness C
	×	—	×	×	×	×	×	• Wiring harness B • TCM (ATX only)
	—	—	—	×	×	×	×	• Wiring harness E • BCM • Wiring harness F
	×	×	—	×	×	×	×	• Wiring harness D • DSC HU/CM
	—	—	—	—	×	×	×	• Wiring harness H
	×	×	×	—	×	×	×	• Wiring harness G • 4WD control module
	—	—	—	—	—	×	×	• Wiring harness J • BCM
	×	×	×	×	—	×	×	• Wiring harness I • SAS control module
	—	—	—	—	—	—	×	• Wiring harness K • BCM
	×	×	×	×	×	—	×	• BCM
	×	×	×	×	×	×	—	• Wiring harness L • Keyless Control Module (with advanced keyless)

Note

• There is no DTC in the instrument cluster that determines signal quality between it and the information display. Due to this, determine the malfunction location using the DTC on the information display.

3. Inspect the display of DTC U0164 (with full-auto air conditioner) using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

4. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status		Malfunction location
Module	Climate control unit (with full-auto air conditioner)	Information display	Malfunction location
Instrument cluster	—	—	• Wiring harness N • Instrument cluster
	—	×	• Wiring harness O • Climate control unit (with full-auto air conditioner)
	×	—	• Wiring harness Q • Wiring harness S • Information display

Climate control unit (with full-auto air conditioner)

Note

• There is no DTC in the Climate control unit (with full-auto air conditioner) that determines signal quality between it and the information display. Due to this, determine the malfunction location using the DTC on the information display.

1. Inspect the display of DTC U0155 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

2. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status		Malfunction location
Module	Instrument cluster	Information display	Malfunction location
Climate control unit (with full-auto air conditioner)	—	—	• Wiring harness O • Climate control unit (with full-auto air conditioner)
	—	×	• Wiring harness N • Instrument cluster
	×	—	• Wiring harness Q • Wiring harness S • Information display

Audio Unit (Base Module)

Note

• There is no DTC in the audio unit (base module) that determines signal quality between it and the information display. Due to this, determine the malfunction location using the DTC on the information display.

1. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status	Malfunction location
Module	Information display	Malfunction location
Audio unit (base module)	—	• Wiring harness P • Wiring harness Q • Wiring harness S • Audio unit (base module) • Information display

Information display

1. Inspect the display of DTC U0166, U0181 and/or U0184 using the input/output check mode. (See INFORMATION DISPLAY INPUT/OUTPUT CHECK MODE.)

2. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status			Malfunction location
Module	Climate control unit (with full-auto air conditioner)	Audio unit (base module)	Instrument cluster	Malfunction location
Information display	—	—	—	• Wiring harness Q • Wiring harness S • Information display
	—	×	×	• Wiring harness O • Climate control unit (with full-auto air conditioner)
	×	—	×	• Wiring harness P • Car-navigation unit • Audio unit (base module)
	×	×	—	• Wiring harness N • Instrument cluster

Repair Procedure

1. Inspect the connector of malfunctioning module.

• If there is any malfunction, repair or replace the connector.

2. Inspect the malfunctioning wiring harnesses as follow:

• If there is any malfunction, repair or replace the wiring harnesses.

• If there is no malfunction, replace the malfunctioning module.

― Short to GND

― Short to power supply

― Twisted pair short each other

― Open circuit

3. Make sure to reconnect all disconnected connectors.

4. Clear the CAN system related DTCs using the M-MDS.

5. Verify if the CAN system related DTCs are displayed using the M-MDS.

• If the same following DTCs are present, replace the malfunctioning module.

― U0073 (PCM, TCM (ATX only), DSC HU/CM, 4WD control module, BCM, SAS control module, Keyless Control Module (with advanced keyless), instrument cluster)

― U0516 (Climate control unit (with full-auto air conditioner))

― U2516 (Instrument cluster, information display)

― 16:Er12 (Audio unit (base module))

• If other DTC is present, perform the appropriate DTC inspection. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)