MULTIPLEX COMMUNICATION SYSTEM [MULTIPLEX COMMUNICATION SYSTEM]

id0902e6830400

Outline

• If the controller area network (CAN) system is malfunctioning, read the DTCs of the following modules, using the M-MDS to determine the malfunctioning system.

― PCM

― TCM (ATX only)

― DSC HU/CM

― 4WD control module

― BCM

― SAS control module

― Keyless control module (with advanced keyless)

― Instrument cluster

― Audio amplifier (with Bose®)

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

― Audio unit (base module)

― Information display

Flowchart

• Use the following flowchart to verify the cause of the trouble.

STEP

INSPECTION

ACTION

1

INSPECT DTC INDICATION

•  Using the M-MDS, inspect if DTCs are displayed for the following module:

―  PCM

―  TCM (ATX only)

―  DSC HU/CM

―  4WD control module

―  BCM

―  SAS control module

―  Keyless control module (with advanced keyless)

―  Instrument cluster

―  Audio amplifier (with Bose®)

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

―  Audio unit (base module)

―  Information display

•  Are any DTCs displayed?

Yes

Go to the next step.

No

Go to Step 5.

2

INSPECT CAN SYSTEM-RELATED DTC

•  Are any DTCs other than the following displayed?

―  U0028

―  U0073

―  U0100

―  U0101 (ATX only)

―  U0114

―  U0121

―  U0140

―  U0151

―  U0155

―  U0164

―  U0166

―  U0181

―  U0184

―  U0323

―  U0415

―  U0516

―  U1900

―  U2023

―  U2516

―  16:Er12

Yes

Repair the malfunctioning part by following the related DTC inspection.

Go to the next step.

No

Go to the next step.

3

INSPECT CAN SYSTEM-RELATED DTC

•  Are any of the following DTCs displayed?

―  PCM: U0073, U0101 (ATX only), U0121, U0155

―  TCM (ATX only): U0073, U0100, U0121, U0140, U0415

―  DSC HU/CM: U0073, U0100, U0101 (ATX only), U0114, U0140 (MTX only), U1900, U2023

―  4WD control module: U0073, U0100, U0101 (ATX only), U0121, U0140 (MTX only), U0155

―  BCM: U0028, U0073, U0100

―  SAS control module: U0073, U0151, U0155

―  Keyless control module (with advanced keyless): U0073, U0100, U0140, U0323, U2023

―  Instrument cluster: U0073, U0100, U0101 (ATX only), U0114, U0121, U0140, U0151, U0164 (with full-auto air conditioner ), U2023, U2516

―  Climate control unit (with full-auto air conditioner): U0155, U0516

―  Audio unit (base module): 16:Er12

―  Information display: U0166, U0181, U0184, U2516

Yes

Repair the malfunctioning part by following the DTC inspection.

Go to the next step.

No

Troubleshooting completed.

4

VERIFY TROUBLESHOOTING COMPLETED

•  Clear the DTC from the CAN system-related modules using the M-MDS.

•  Start the engine.

•  Are any of the CAN related DTCs displayed?

Yes

Go back to Step 3.

No

Troubleshooting completed.

5

INSPECT COMMUNICATION CONDITION

•  Is there a response from the following modules?

―  PCM

―  TCM (ATX only)

―  DSC HU/CM

―  4WD control module

―  BCM

―  SAS control module

―  Keyless control module (with advanced keyless)

―  Instrument cluster

―  Audio amplifier (with Bose®)

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

―  Audio unit (base module)

―  Information display

Yes

Troubleshooting completed.

No

Go to the next step.

6

INSPECT MODULES THAT DO NOT RESPOND

•  Inspect the power supply and the ground circuit for any units that do not respond.

•  Are they normal?

Yes

Go to the next step.

No

Repair the malfunctioning part, then go back to Step 1.

7

INSPECT CONNECTOR AND WIRING HARNESS BETWEEN MODULES THAT DO NOT RESPOND AND DLC-2

•  Turn the ignition switch to the LOCK position.

•  Inspect the wiring harness and connector between any module that does not respond and the DLC-2.

PCM—DLC-2

•  1AM—F

•  1AI—E

TCM (ATX only)—DLC-2

•  A14—F

•  A6—E

DSC HU/CM—DLC-2

•  X—F

•  W—E

4WD control module—DLC-2

•  G—F

•  H—E

BCM—DLC-2

•  3U, 5I—F

•  3W, 5L—E

SAS control module—DLC-2

•  2E—F

•  2F—E

Keyless control module (with advanced keyless)—DLC-2

•  3X—F

•  3W—E

Instrument cluster—DLC-2

•  2R—F

•  2T—E

•  2V—L

•  2X—K

Audio amplifier (with Bose®)—DLC-2

•  2O—L

•  2P—K

Climate control unit (with full-auto air conditioner)—DLC-2

•  B—L

•  A—K

Audio unit (base module)—DLC-2

•  1O—L

•  1Q—K

Information display—DLC-2

•  J—L

•  L—K

•  Is there any malfunction?

Yes

Repair the malfunctioning part, then go back to Step 1.

No

Go to the next step.

8

INSPECT WIRING HARNESS

•  Turn the ignition switch to the ON position (Engine off).

•  Measure the voltage between the following terminals.

―  DLC-2 terminals F and GND

―  DLC-2 terminals E and GND

―  DLC-2 terminals L and GND

―  DLC-2 terminals K and GND

•  Is the voltage 2.0—3.0 V?

Yes

Go to the next step.

No

Go to Step 13.

9

INSPECT WIRING HARNESS

•  Turn the ignition switch to the LOCK position.

•  Measure the resistance between the following terminals.

―  DLC-2 terminals F and E

―  DLC-2 terminals L and K

•  Is the resistance 59—65 ohms?

Yes

Replace the modules that do not respond, then go back to Step 1.

No

Go to the next step.

10

INSPECT PCM

•  Disconnect the PCM connector.

•  Measure the resistance between following terminals.

―  PCM terminals 1AM and 1AI (part-side)

•  Is the resistance 118—130 ohms?

Yes

Go to the next step.

No

Replace the PCM, then go to the next step.

11

INSPECT INSTRUMENT CLUSTER

•  Disconnect the instrument cluster connector.

•  Measure the resistance between the following terminals.

―  Instrument cluster terminals 2R and 2T (part-side)

―  Instrument cluster terminals 2V and 2X (part-side)

•  Is the resistance 118—130 ohms?

Yes

Go to next step.

No

Replace the instrument cluster, then go to the next step.

12

INSPECT INFORMATION DISPLAY

•  Disconnect the information display connector.

•  Measure the resistance between the following terminals.

―  Information display terminal J and I (part-side)

•  Is the resistance 118—130 ohms?

Yes

Go to next step.

No

Replace the BCM, then go to the next step.

13

CLASSIFY WIRING HARNESS MALFUNCTION OR MODULE MALFUNCTION

•  Turn the ignition switch to the LOCK position.

•  Disconnect the connector of any unit that does not respond. (If there are two or more units that do not respond, disconnect only one of the units.)

•  Turn the ignition switch to the ON position.

•  Measure the voltage between the following terminals.

―  DLC-2 terminals F and GND

―  DLC-2 terminals E and GND

―  DLC-2 terminals L and GND

―  DLC-2 terminals K and GND

•  Is voltage 2.0—3.0 V?

Yes

Go to the next step.

No

Retry this step with other module connector disconnected.

If all units that do not respond are disconnected, go to Step 15.

14

INSPECT WIRING HARNESS OF ANY UNIT THAT DOES NOT RESPOND

•  Turn the ignition switch to the LOCK position.

•  Inspect for continuity between the following connector terminals of any disconnected unit.

PCM—DLC-2

•  1AM—other terminals

•  1AI—other terminals

TCM (ATX only)—DLC-2

•  A14—other terminals

•  A6—other terminals

DSC HU/CM—DLC-2

•  X—other terminals

•  W—other terminals

4WD control module—DLC-2

•  G—other terminals

•  H—other terminals

BCM—DLC-2

•  3U, 5I—other terminals

•  3W, 5L—other terminals

SAS control module—DLC-2

•  2E—other terminals

•  2F—other terminals

Keyless control module (with advanced keyless)—DLC-2

•  3X—other terminals

•  3W—other terminals

Instrument cluster—DLC-2

•  2R—other terminals

•  2T—other terminals

•  2V—other terminals

•  2X—other terminals

Audio amplifier (with Bose®)—DLC-2

•  2O—other terminals

•  2P—other terminals

Climate control unit (with full-auto air conditioner)—DLC-2

•  B—other terminals

•  A—other terminals

Audio unit (base module)—DLC-2

•  1O—other terminals

•  1Q—other terminals

Information display—DLC-2

•  J—other terminals

•  L—other terminals

•  Is there continuity?

Yes

Repair or replace the wiring harness, then go back to Step 1.

No

Replace the disconnected unit, then go back to Step 1.

15

INSPECT CAN RELATED WIRING HARNESS

•  Inspect the related wiring harnesses (CAN_L and/or CAN_H) for the short circuit (to power supply or ground).

•  Is the wiring harness normal?

Yes

Repair or replace the wiring harness, then go back to Step 1.

No

Go back to Step 1.

STEP	INSPECTION		ACTION
1	INSPECT DTC INDICATION • Using the M-MDS, inspect if DTCs are displayed for the following module: ― PCM ― TCM (ATX only) ― DSC HU/CM ― 4WD control module ― BCM ― SAS control module ― Keyless control module (with advanced keyless) ― Instrument cluster ― Audio amplifier (with Bose®) ― Climate control unit (with full-auto air conditioner) ― Audio unit (base module) ― Information display • Are any DTCs displayed?	Yes	Go to the next step.
1		No	Go to Step 5.
2	INSPECT CAN SYSTEM-RELATED DTC • Are any DTCs other than the following displayed? ― U0028 ― U0073 ― U0100 ― U0101 (ATX only) ― U0114 ― U0121 ― U0140 ― U0151 ― U0155 ― U0164 ― U0166 ― U0181 ― U0184 ― U0323 ― U0415 ― U0516 ― U1900 ― U2023 ― U2516 ― 16:Er12	Yes	Repair the malfunctioning part by following the related DTC inspection. Go to the next step.
2		No	Go to the next step.
3	INSPECT CAN SYSTEM-RELATED DTC • Are any of the following DTCs displayed? ― PCM: U0073, U0101 (ATX only), U0121, U0155 ― TCM (ATX only): U0073, U0100, U0121, U0140, U0415 ― DSC HU/CM: U0073, U0100, U0101 (ATX only), U0114, U0140 (MTX only), U1900, U2023 ― 4WD control module: U0073, U0100, U0101 (ATX only), U0121, U0140 (MTX only), U0155 ― BCM: U0028, U0073, U0100 ― SAS control module: U0073, U0151, U0155 ― Keyless control module (with advanced keyless): U0073, U0100, U0140, U0323, U2023 ― Instrument cluster: U0073, U0100, U0101 (ATX only), U0114, U0121, U0140, U0151, U0164 (with full-auto air conditioner ), U2023, U2516 ― Climate control unit (with full-auto air conditioner): U0155, U0516 ― Audio unit (base module): 16:Er12 ― Information display: U0166, U0181, U0184, U2516	Yes	Repair the malfunctioning part by following the DTC inspection. Go to the next step.
3		No	Troubleshooting completed.
4	VERIFY TROUBLESHOOTING COMPLETED • Clear the DTC from the CAN system-related modules using the M-MDS. • Start the engine. • Are any of the CAN related DTCs displayed?	Yes	Go back to Step 3.
4		No	Troubleshooting completed.
5	INSPECT COMMUNICATION CONDITION • Is there a response from the following modules? ― PCM ― TCM (ATX only) ― DSC HU/CM ― 4WD control module ― BCM ― SAS control module ― Keyless control module (with advanced keyless) ― Instrument cluster ― Audio amplifier (with Bose®) ― Climate control unit (with full-auto air conditioner) ― Audio unit (base module) ― Information display	Yes	Troubleshooting completed.
5		No	Go to the next step.
6	INSPECT MODULES THAT DO NOT RESPOND • Inspect the power supply and the ground circuit for any units that do not respond. • Are they normal?	Yes	Go to the next step.
6		No	Repair the malfunctioning part, then go back to Step 1.
7	INSPECT CONNECTOR AND WIRING HARNESS BETWEEN MODULES THAT DO NOT RESPOND AND DLC-2 • Turn the ignition switch to the LOCK position. • Inspect the wiring harness and connector between any module that does not respond and the DLC-2. PCM—DLC-2 • 1AM—F • 1AI—E TCM (ATX only)—DLC-2 • A14—F • A6—E DSC HU/CM—DLC-2 • X—F • W—E 4WD control module—DLC-2 • G—F • H—E BCM—DLC-2 • 3U, 5I—F • 3W, 5L—E SAS control module—DLC-2 • 2E—F • 2F—E Keyless control module (with advanced keyless)—DLC-2 • 3X—F • 3W—E Instrument cluster—DLC-2 • 2R—F • 2T—E • 2V—L • 2X—K Audio amplifier (with Bose®)—DLC-2 • 2O—L • 2P—K Climate control unit (with full-auto air conditioner)—DLC-2 • B—L • A—K Audio unit (base module)—DLC-2 • 1O—L • 1Q—K Information display—DLC-2 • J—L • L—K • Is there any malfunction?	Yes	Repair the malfunctioning part, then go back to Step 1.
7		No	Go to the next step.
8	INSPECT WIRING HARNESS • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between the following terminals. ― DLC-2 terminals F and GND ― DLC-2 terminals E and GND ― DLC-2 terminals L and GND ― DLC-2 terminals K and GND • Is the voltage 2.0—3.0 V?	Yes	Go to the next step.
8		No	Go to Step 13.
9	INSPECT WIRING HARNESS • Turn the ignition switch to the LOCK position. • Measure the resistance between the following terminals. ― DLC-2 terminals F and E ― DLC-2 terminals L and K • Is the resistance 59—65 ohms?	Yes	Replace the modules that do not respond, then go back to Step 1.
9		No	Go to the next step.
10	INSPECT PCM • Disconnect the PCM connector. • Measure the resistance between following terminals. ― PCM terminals 1AM and 1AI (part-side) • Is the resistance 118—130 ohms?	Yes	Go to the next step.
10		No	Replace the PCM, then go to the next step.
11	INSPECT INSTRUMENT CLUSTER • Disconnect the instrument cluster connector. • Measure the resistance between the following terminals. ― Instrument cluster terminals 2R and 2T (part-side) ― Instrument cluster terminals 2V and 2X (part-side) • Is the resistance 118—130 ohms?	Yes	Go to next step.
11		No	Replace the instrument cluster, then go to the next step.
12	INSPECT INFORMATION DISPLAY • Disconnect the information display connector. • Measure the resistance between the following terminals. ― Information display terminal J and I (part-side) • Is the resistance 118—130 ohms?	Yes	Go to next step.
12		No	Replace the BCM, then go to the next step.
13	CLASSIFY WIRING HARNESS MALFUNCTION OR MODULE MALFUNCTION • Turn the ignition switch to the LOCK position. • Disconnect the connector of any unit that does not respond. (If there are two or more units that do not respond, disconnect only one of the units.) • Turn the ignition switch to the ON position. • Measure the voltage between the following terminals. ― DLC-2 terminals F and GND ― DLC-2 terminals E and GND ― DLC-2 terminals L and GND ― DLC-2 terminals K and GND • Is voltage 2.0—3.0 V?	Yes	Go to the next step.
13		No	Retry this step with other module connector disconnected. If all units that do not respond are disconnected, go to Step 15.
14	INSPECT WIRING HARNESS OF ANY UNIT THAT DOES NOT RESPOND • Turn the ignition switch to the LOCK position. • Inspect for continuity between the following connector terminals of any disconnected unit. PCM—DLC-2 • 1AM—other terminals • 1AI—other terminals TCM (ATX only)—DLC-2 • A14—other terminals • A6—other terminals DSC HU/CM—DLC-2 • X—other terminals • W—other terminals 4WD control module—DLC-2 • G—other terminals • H—other terminals BCM—DLC-2 • 3U, 5I—other terminals • 3W, 5L—other terminals SAS control module—DLC-2 • 2E—other terminals • 2F—other terminals Keyless control module (with advanced keyless)—DLC-2 • 3X—other terminals • 3W—other terminals Instrument cluster—DLC-2 • 2R—other terminals • 2T—other terminals • 2V—other terminals • 2X—other terminals Audio amplifier (with Bose®)—DLC-2 • 2O—other terminals • 2P—other terminals Climate control unit (with full-auto air conditioner)—DLC-2 • B—other terminals • A—other terminals Audio unit (base module)—DLC-2 • 1O—other terminals • 1Q—other terminals Information display—DLC-2 • J—other terminals • L—other terminals • Is there continuity?	Yes	Repair or replace the wiring harness, then go back to Step 1.
14		No	Replace the disconnected unit, then go back to Step 1.
15	INSPECT CAN RELATED WIRING HARNESS • Inspect the related wiring harnesses (CAN_L and/or CAN_H) for the short circuit (to power supply or ground). • Is the wiring harness normal?	Yes	Repair or replace the wiring harness, then go back to Step 1.
15		No	Go back to Step 1.