PROCEDURES FOR DETERMINING THE LOCATION OF A MALFUNCTION

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System Wiring Diagram

PCM

1. Inspect the display of DTC U0101, 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.

Without power retractable hardtop

×: Normal

-: Communication error


Module	Communication status				Malfunction location
Module	DSC HU/CM ABS HU/CM	TCM	Keyless control module	Instrument cluster	Malfunction location
PCM	-	-	-	-	• Wiring harness A • PCM
	-	×	×	×	• Wiring harness B • DSC HU/CM or ABS HU/CM
	×	-	×	×	• Wiring harness D • TCM
	×	×	-	-	• Wiring harness E • Wiring harness F • Wiring harness H
	×	×	-	×	• Wiring harness E • Keyless control module
	×	×	×	-	• Wiring harness F • Wiring harness H • Instrument cluster

With power retractable hardtop

×: Normal

-: Communication error


Module	Communication status				Malfunction location
Module	DSC HU/CM ABS HU/CM	TCM	Keyless control module	Instrument cluster	Malfunction location
PCM	-	-	-	-	• Wiring harness A • PCM
	-	×	×	×	• Wiring harness B • DSC HU/CM or ABS HU/CM
	×	-	×	×	• Wiring harness H • TCM
	×	×	-	-	• Wiring harness I • Wiring harness J • Wiring harness K • Wiring harness M
	×	×	-	×	• Wiring harness I • Keyless control module
	×	×	×	-	• Wiring harness J • Wiring harness K • Wiring harness M • Instrument cluster

TCM

1. Inspect the display of DTC 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.

Without power retractable hardtop

×: Normal

-: Communication error


Module	Communication status			Malfunction location
Module	PCM	DSC HU/CM ABS HU/CM	Instrument cluster	Malfunction location
TCM	-	-	-	• Wiring harness D • TCM
	-	×	×	• Wiring harness A • PCM
	×	-	×	• Wiring harness B • DSC HU/CM or ABS HU/CM
	×	×	-	• Wiring harness F • Wiring harness H • Instrument cluster

With power retractable hardtop

×: Normal

-: Communication error


Module	Communication status			Malfunction location
Module	PCM	DSC HU/CM ABS HU/CM	Instrument cluster	Malfunction location
TCM	-	-	-	• Wiring harness H • TCM
	-	×	×	• Wiring harness A • PCM
	×	-	×	• Wiring harness B • DSC HU/CM or ABS HU/CM
	×	×	-	• Wiring harness J • Wiring harness K • Wiring harness M • Instrument cluster

DSC HU/CM or ABS HU/CM

1. Inspect the display of DTC U0100 (DSC), U0101 (DSC), U0155 (DSC), U1900 and/or U2023, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

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

Without power retractable hardtop

×: Normal

-: Communication error


Module	Communication status			Malfunction location
Module	PCM	TCM	Instrument cluster	Malfunction location
DSC HU/CM or ABS HU/CM	-	-	-	• Wiring harness B • DSC HU/CM or ABS HU/CM
	-	×	×	• Wiring harness A • PCM
	×	-	×	• Wiring harness D • TCM
	×	×	-	• Wiring harness F • Wiring harness H • Instrument cluster

With power retractable hardtop

×: Normal

-: Communication error


Module	Communication status			Malfunction location
Module	PCM	TCM	Instrument cluster	Malfunction location
DSC HU/CM or ABS HU/CM	-	-	-	• Wiring harness B • DSC HU/CM or ABS HU/CM
	-	×	×	• Wiring harness A • PCM
	×	-	×	• Wiring harness H • TCM
	×	×	-	• Wiring harness J • Wiring harness K • Wiring harness M • Instrument cluster

Power Retractable Hardtop Control Module

1. Inspect the display of DTC U0100, U0101 and/or U2197, 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	Keyless control module	Instrument cluster	Malfunction location
Power retractable hardtop control module	-	-	-	-	• Wiring harness F • Power retractable hardtop control module
	-	×	×	×	• Wiring harness A • Wiring harness C • Wiring harness D • PCM
	×	-	×	×	• Wiring harness H • TCM

Keyless Control Module

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

(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

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

Without power retractable hardtop

×: Normal

-: Communication error


Module	Communication status		Malfunction location
Module	PCM	Instrument cluster	Malfunction location
Keyless control module	-	-	• Wiring harness E • Keyless control module
	-	×	• Wiring harness A • Wiring harness C • PCM
	×	-	• Wiring harness F • Wiring harness H • Instrument cluster

With power retractable hardtop

×: Normal

-: Communication error


Module	Communication status			Malfunction location
Module	PCM	Instrument cluster	Power retractable hardtop control module	Malfunction location
DSC HU/CM or ABS HU/CM	-	-	-	• Wiring harness I • Keyless control module
	-	×	×	• Wiring harness A • Wiring harness C • Wiring harness D • PCM
	×	-	×	• Wiring harness J • Wiring harness K • Wiring harness M • Instrument cluster
	×	×	-	• Wiring harness F • Power retractable hardtop control module

Steering Angle Sensor

1. Inspect the display of DTC U1900 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

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

Without power retractable hardtop

×: Normal

-: Communication error


Module	Communication status	Malfunction location
Module	DSC HU/CM	Malfunction location
Steering Angle Sensor	-	• Wiring harness B • Wiring harness C • Wiring harness F • Wiring harness G • DSC HU/CM • Steering Angle Sensor

With power retractable hardtop

×: Normal

-: Communication error


Module	Communication status	Malfunction location
Module	DSC HU/CM	Malfunction location
Steering Angle Sensor	-	• Wiring harness B • Wiring harness C • Wiring harness D • Wiring harness E • Wiring harness G • Wiring harness J • Wiring harness K • Wiring harness L • DSC HU/CM • Steering Angle Sensor

Instrument Cluster

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

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

Without power retractable hardtop

×: Normal

-: Communication error


Module	Communication status				Malfunction location
Module	PCM	DSC HU/CM ABS HU/CM	TCM	Keyless control module	Malfunction location
Instrument cluster	-	-	-	-	• Wiring harness F • Wiring harness H • Instrument cluster
	-	-	-	×	• Wiring harness A • Wiring harness B • Wiring harness C • Wiring harness D
	-	×	×	×	• Wiring harness A • PCM
	×	-	×	×	• Wiring harness B • DSC HU/CM or ABS HU/CM
	×	×	-	×	• Wiring harness D • TCM
	×	×	×	-	• Wiring harness E • Keyless control module

With power retractable hardtop

×: Normal

-: Communication error


Module	Communication status				Malfunction location
Module	PCM	DSC HU/CM ABS HU/CM	TCM	Keyless control module	Malfunction location
Instrument cluster	-	-	-	-	• Wiring harness M • Instrument cluster
	-	-	-	×	• Wiring harness A • Wiring harness B • Wiring harness C • Wiring harness D • Wiring harness E • Wiring harness G • Wiring harness H
	-	×	×	×	• Wiring harness A • PCM
	×	-	×	×	• Wiring harness B • DSC HU/CM or ABS HU/CM
	×	×	-	×	• Wiring harness H • TCM
	×	×	×	-	• Wiring harness I • Keyless control module

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, DSC HU/CM, ABS HU/CM, keyless control module, instrument cluster, power retractable hardtop control module)

- U2516 (steering angle sensor)

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