DTC U0028:87 [REAR VEHICLE MONITORING SYSTEM]

id0902z2886700

Malfunction location

• Communication error (CAN bus) between rear vehicle monitoring control modules (RH)/(LH)

Detection condition

• Bus off

Possible Causes

• Open or short circuit in wiring harness between rear vehicle monitoring control module (RH) terminal A and rear vehicle monitoring control module (LH) terminal I

• Open or short circuit in wiring harness between rear vehicle monitoring control module (RH) terminal C and rear vehicle monitoring control module (LH) terminal L

• Rear vehicle monitoring control module malfunction

System Wiring Diagram

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Diagnostic Procedure

Step

Inspection

Action

1

PERFORM DTC INSPECTION

•  Clear DTCs using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].)

•  Perform the rear vehicle monitoring control module DTC inspection using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].)

•  Is DTC U0028:87 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

VERIFY REAR VEHICLE MONITORING CONTROL MODULE CONNECTOR CONDITION

•  Disconnect the negative battery cable.

•  Disconnect the rear vehicle monitoring control modules (RH)/(LH) connectors.

•  Verify the connector and terminal condition. (Corrosion, damage, and disconnected pins)

•  Are the connectors and terminals normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning wiring harness, connector and terminal.

Verify that the repairs have been completed.

3

INSPECT CAN BUS CIRCUIT FOR OPEN CIRCUIT

•  Inspect the wiring harness for continuity between the following rear vehicle monitoring control module (RH) connector and rear vehicle monitoring control module (LH) connector.

―  Rear vehicle monitoring control module (RH) terminal A to rear vehicle monitoring control module (LH) terminal I

―  Rear vehicle monitoring control module (RH) terminal C to rear vehicle monitoring control module (LH) terminal L

•  Is there continuity?

Yes

Go to the next step.

No

Repair or replace the malfunctioning wiring harness.

Verify that the repairs have been completed.

4

INSPECT CAN BUS CIRCUIT FOR SHORT TO GROUND

•  Start the engine.

•  Inspect the wiring harness for continuity between the following rear vehicle monitoring control module (RH) and body ground.

―  Rear vehicle monitoring control module (RH) terminal A to body ground

―  Rear vehicle monitoring control module (RH) terminal C to body ground

•  Is there continuity?

Yes

Go to the next step.

No

Repair or replace the malfunctioning wiring harness.

Verify that the repairs have been completed.

5

INSPECT CAN BUS CIRCUIT FOR SHORT CIRCUIT

•  Inspect the wiring harness for continuity between the following rear vehicle monitoring control module (RH)/(LH) connectors.

―  Rear vehicle monitoring control module (RH) terminal A to rear vehicle monitoring control module (RH) terminal C

―  Rear vehicle monitoring control module (LH) terminal I to rear vehicle monitoring control module (LH) terminal L

•  Is there continuity?

Yes

Go to the next step.

No

Repair or replace the malfunctioning wiring harness.

Verify that the repairs have been completed.

6

INSPECT CAN BUS CIRCUIT FOR SHORT TO POWER SUPPLY

•  Connect the negative battery cable.

•  Switch the ignition to ON.

•  Measure the voltage at the following rear vehicle monitoring control module (RH) connector.

―  Rear vehicle monitoring control module (RH) terminal A

―  Rear vehicle monitoring control module (RH) terminal C

•  Is the voltage measured?

Yes

Repair or replace the malfunctioning wiring harness.

Verify that the repairs have been completed.

No

Go to the next step.

7

VERIFY DTCs

•  Switch the ignition to off (LOCK).

•  Disconnect the negative battery cable.

•  Reconnect the disconnected connectors.

•  Connect the negative battery cable.

•  Clear DTCs using the M-MDS.

•  Perform the rear vehicle monitoring control module DTC inspection using the M-MDS.

•  Is DTC U0028:87 displayed?

Yes

Replace the rear vehicle monitoring control module (RH), then go to the next step.

No

Go to Step 9.

8

VERIFY CORRECTION COMPLETED

•  Connect the negative battery cable.

•  Clear DTCs using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].)

•  Perform the rear vehicle monitoring control module DTC inspection using the M-MDS.
(See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].)

•  Is DTC U0028:87 displayed?

Yes

Replace the rear vehicle monitoring control module (LH).

(See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)

No

Go to the next step.

9

VERIFY THAT NO OTHER DTCs ARE RECORDED

•  Are any other DTCs displayed?

Yes

Perform the corresponding DTC inspection.

No

DTC troubleshooting completed.

Step	Inspection		Action
1	PERFORM DTC INSPECTION • Clear DTCs using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].) • Perform the rear vehicle monitoring control module DTC inspection using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].) • Is DTC U0028:87 displayed?	Yes	Go to the next step.
1		No	DTC troubleshooting completed.
2	VERIFY REAR VEHICLE MONITORING CONTROL MODULE CONNECTOR CONDITION • Disconnect the negative battery cable. • Disconnect the rear vehicle monitoring control modules (RH)/(LH) connectors. • Verify the connector and terminal condition. (Corrosion, damage, and disconnected pins) • Are the connectors and terminals normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning wiring harness, connector and terminal. Verify that the repairs have been completed.
3	INSPECT CAN BUS CIRCUIT FOR OPEN CIRCUIT • Inspect the wiring harness for continuity between the following rear vehicle monitoring control module (RH) connector and rear vehicle monitoring control module (LH) connector. ― Rear vehicle monitoring control module (RH) terminal A to rear vehicle monitoring control module (LH) terminal I ― Rear vehicle monitoring control module (RH) terminal C to rear vehicle monitoring control module (LH) terminal L • Is there continuity?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning wiring harness. Verify that the repairs have been completed.
4	INSPECT CAN BUS CIRCUIT FOR SHORT TO GROUND • Start the engine. • Inspect the wiring harness for continuity between the following rear vehicle monitoring control module (RH) and body ground. ― Rear vehicle monitoring control module (RH) terminal A to body ground ― Rear vehicle monitoring control module (RH) terminal C to body ground • Is there continuity?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning wiring harness. Verify that the repairs have been completed.
5	INSPECT CAN BUS CIRCUIT FOR SHORT CIRCUIT • Inspect the wiring harness for continuity between the following rear vehicle monitoring control module (RH)/(LH) connectors. ― Rear vehicle monitoring control module (RH) terminal A to rear vehicle monitoring control module (RH) terminal C ― Rear vehicle monitoring control module (LH) terminal I to rear vehicle monitoring control module (LH) terminal L • Is there continuity?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning wiring harness. Verify that the repairs have been completed.
6	INSPECT CAN BUS CIRCUIT FOR SHORT TO POWER SUPPLY • Connect the negative battery cable. • Switch the ignition to ON. • Measure the voltage at the following rear vehicle monitoring control module (RH) connector. ― Rear vehicle monitoring control module (RH) terminal A ― Rear vehicle monitoring control module (RH) terminal C • Is the voltage measured?	Yes	Repair or replace the malfunctioning wiring harness. Verify that the repairs have been completed.
6		No	Go to the next step.
7	VERIFY DTCs • Switch the ignition to off (LOCK). • Disconnect the negative battery cable. • Reconnect the disconnected connectors. • Connect the negative battery cable. • Clear DTCs using the M-MDS. • Perform the rear vehicle monitoring control module DTC inspection using the M-MDS. • Is DTC U0028:87 displayed?	Yes	Replace the rear vehicle monitoring control module (RH), then go to the next step.
7		No	Go to Step 9.
8	VERIFY CORRECTION COMPLETED • Connect the negative battery cable. • Clear DTCs using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].) • Perform the rear vehicle monitoring control module DTC inspection using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].) • Is DTC U0028:87 displayed?	Yes	Replace the rear vehicle monitoring control module (LH). (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
8		No	Go to the next step.
9	VERIFY THAT NO OTHER DTCs ARE RECORDED • Are any other DTCs displayed?	Yes	Perform the corresponding DTC inspection.
9		No	DTC troubleshooting completed.