DTC U0028:87 [REAR VEHICLE MONITORING SYSTEM]

id0902z2886700


Rear Vehicle Monitoring Control Module Connector 10-pin Type

System malfunction location

Rear vehicle monitoring control module (LH) and (RH) communication error
Detection condition
•  No communication between rear vehicle monitoring control modules (LH) and (RH) for 1 s or more.
Fail-safe
•  Inhibits the rear vehicle monitoring system.
Possible cause
•  Rear vehicle monitoring control module (LH) connector or terminal malfunction
•  Rear vehicle monitoring control module (RH) connector or terminal malfunction
•  Short to ground in wiring harness between the following terminals:
―  Rear vehicle monitoring control module (LH) terminal A to rear vehicle monitoring control module (RH) terminal H
―  Rear vehicle monitoring control module (LH) terminal D to rear vehicle monitoring control module (RH) terminal J
•  Short to power supply in wiring harness between the following terminals:
―  Rear vehicle monitoring control module (LH) terminal A to rear vehicle monitoring control module (RH) terminal H
―  Rear vehicle monitoring control module (LH) terminal D to rear vehicle monitoring control module (RH) terminal J
•  Open circuit in wiring harness between the following terminals:
―  Rear vehicle monitoring control module (LH) terminal A to rear vehicle monitoring control module (RH) terminal H
―  Rear vehicle monitoring control module (LH) terminal D to rear vehicle monitoring control module (RH) terminal J
•  Rear vehicle monitoring control module (LH) malfunction
•  Rear vehicle monitoring control module (RH) malfunction

Diagnostic Procedure

Step

Inspection

Action
1
INSPECT REAR VEHICLE MONITORING CONTROL MODULE (LH) CONNECTOR
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the rear vehicle monitoring control module (LH) 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.
No
Repair or replace the connector, then go to Step 6.
2
INSPECT REAR VEHICLE MONITORING CONTROL MODULE (RH) CONNECTOR
•  Disconnect the rear vehicle monitoring control modules (RH) 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.
No
Repair or replace the connector, then go to Step 6.
3
INSPECT FOR SHORT TO GROUND IN CAN COMMUNICATION CIRCUIT BETWEEN REAR VEHICLE MONITORING CONTROL MODULES (LH) AND (RH)
•  Verify that the rear vehicle monitoring control module (LH) and (RH) connectors are disconnected.
•  Inspect for continuity between the following terminals (vehicle wiring harness side) and body ground.
―  Rear vehicle monitoring control module (LH) terminal A
―  Rear vehicle monitoring control module (LH) terminal D
•  Is there continuity?
Yes
Repair or replace the wiring harness which is shorted to ground, then go to Step 6.
No
Go to the next step.
4
INSPECT FOR SHORT TO POWER SUPPLY IN CAN COMMUNICATION CIRCUIT BETWEEN REAR VEHICLE MONITORING CONTROL MODULES (LH) AND (RH)
•  Verify that the rear vehicle monitoring control module (LH) and (RH) connectors are disconnected.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the following terminals (vehicle wiring harness side).
―  Rear vehicle monitoring control module (LH) terminal A
―  Rear vehicle monitoring control module (LH) terminal D
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness which is shorted to power supply, then go to Step 6.
5
INSPECT FOR OPEN CIRCUIT IN CAN COMMUNICATION CIRCUIT BETWEEN REAR VEHICLE MONITORING CONTROL MODULES (LH) AND (RH)
•  Verify that the rear vehicle monitoring control module (LH) and (RH) connectors are disconnected.
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Inspect the wiring harness between the following terminals (vehicle wiring harness side) for continuity.
―  Rear vehicle monitoring control module (LH) terminal A to rear vehicle monitoring control module (RH) terminal H
―  Rear vehicle monitoring control module (LH) terminal D to rear vehicle monitoring control module (RH) terminal J
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to the next step.
6
PERFORM DTC INSPECTION AND VERIFY REAR VEHICLE MONITORING CONTROL MODULE (LH) MALFUNCTION
•  Reconnect all the disconnected connectors.
•  Reconnect the disconnected negative battery cable.
•  Clear the DTC for the rear vehicle monitoring control module using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 1.5 s or more.
•  Perform the DTC inspection for the rear vehicle monitoring control module using the M-MDS.
•  Is DTC U0028:87 displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the rear vehicle monitoring control module (LH), then go to the next step.
No
Go to Step 8.
7
PERFORM DTC INSPECTION AND VERIFY REAR VEHICLE MONITORING CONTROL MODULE (RH) MALFUNCTION
•  Clear the DTC for the rear vehicle monitoring control module using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 1.5 s or more.
•  Perform the DTC inspection for the rear vehicle monitoring control module using the M-MDS.
•  Is DTC U0028:87 displayed?
Yes
Replace the rear vehicle monitoring control module (RH), then go to the next step.
(See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
8
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [REAR VEHICLE MONITORING SYSTEM].)
No
DTC troubleshooting completed.


Rear Vehicle Monitoring Control Module Connector 12-pin Type

System malfunction location

Rear vehicle monitoring control module (LH) and (RH) communication error
Detection condition
•  No communication between rear vehicle monitoring control modules (LH) and (RH) for 1 s or more.
Fail-safe
•  Inhibits the rear vehicle monitoring system.
Possible cause
•  Rear vehicle monitoring control module (LH) connector or terminal malfunction
•  Rear vehicle monitoring control module (RH) connector or terminal malfunction
•  Short to ground in wiring harness between the following terminals:
―  Rear vehicle monitoring control module (LH) terminal L to rear vehicle monitoring control module (RH) terminal C
―  Rear vehicle monitoring control module (LH) terminal I to rear vehicle monitoring control module (RH) terminal A
•  Short to power supply in wiring harness between the following terminals:
―  Rear vehicle monitoring control module (LH) terminal L to rear vehicle monitoring control module (RH) terminal C
―  Rear vehicle monitoring control module (LH) terminal I to rear vehicle monitoring control module (RH) terminal A
•  Open circuit in wiring harness between the following terminals:
―  Rear vehicle monitoring control module (LH) terminal L to rear vehicle monitoring control module (RH) terminal C
―  Rear vehicle monitoring control module (LH) terminal I to rear vehicle monitoring control module (RH) terminal A
•  Rear vehicle monitoring control module (LH) malfunction
•  Rear vehicle monitoring control module (RH) malfunction

Diagnostic Procedure

Step

Inspection

Action
1
INSPECT REAR VEHICLE MONITORING CONTROL MODULE (LH) CONNECTOR
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the rear vehicle monitoring control module (LH) 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.
No
Repair or replace the connector, then go to Step 6.
2
INSPECT REAR VEHICLE MONITORING CONTROL MODULE (RH) CONNECTOR
•  Disconnect the rear vehicle monitoring control modules (RH) 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.
No
Repair or replace the connector, then go to Step 6.
3
INSPECT FOR SHORT TO GROUND IN CAN COMMUNICATION CIRCUIT BETWEEN REAR VEHICLE MONITORING CONTROL MODULES (LH) AND (RH)
•  Verify that the rear vehicle monitoring control module (LH) and (RH) connectors are disconnected.
•  Inspect for continuity between the following terminals (vehicle wiring harness side) and body ground.
―  Rear vehicle monitoring control module (LH) terminal L
―  Rear vehicle monitoring control module (LH) terminal I
•  Is there continuity?
Yes
Repair or replace the wiring harness which is shorted to ground, then go to Step 6.
No
Go to the next step.
4
INSPECT FOR SHORT TO POWER SUPPLY IN CAN COMMUNICATION CIRCUIT BETWEEN REAR VEHICLE MONITORING CONTROL MODULES (LH) AND (RH)
•  Verify that the rear vehicle monitoring control module (LH) and (RH) connectors are disconnected.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the following terminals (vehicle wiring harness side).
―  Rear vehicle monitoring control module (LH) terminal L
―  Rear vehicle monitoring control module (LH) terminal I
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness which is shorted to power supply, then go to Step 6.
5
INSPECT FOR OPEN CIRCUIT IN CAN COMMUNICATION CIRCUIT BETWEEN REAR VEHICLE MONITORING CONTROL MODULES (LH) AND (RH)
•  Verify that the rear vehicle monitoring control module (LH) and (RH) connectors are disconnected.
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Inspect the wiring harness between the following terminals (vehicle wiring harness side) for continuity.
―  Rear vehicle monitoring control module (LH) terminal L to rear vehicle monitoring control module (RH) terminal C
―  Rear vehicle monitoring control module (LH) terminal I to rear vehicle monitoring control module (RH) terminal A
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to the next step.
6
PERFORM DTC INSPECTION AND VERIFY REAR VEHICLE MONITORING CONTROL MODULE (LH) MALFUNCTION
•  Reconnect all the disconnected connectors.
•  Reconnect the disconnected negative battery cable.
•  Clear the DTC for the rear vehicle monitoring control module using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 1.5 s or more.
•  Perform the DTC inspection for the rear vehicle monitoring control module using the M-MDS.
•  Is DTC U0028:87 displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the rear vehicle monitoring control module (LH), then go to the next step.
No
Go to Step 8.
7
PERFORM DTC INSPECTION AND VERIFY REAR VEHICLE MONITORING CONTROL MODULE (RH) MALFUNCTION
•  Clear the DTC for the rear vehicle monitoring control module using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 1.5 s or more.
•  Perform the DTC inspection for the rear vehicle monitoring control module using the M-MDS.
•  Is DTC U0028:87 displayed?
Yes
Replace the rear vehicle monitoring control module (RH), then go to the next step.
(See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
8
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [REAR VEHICLE MONITORING SYSTEM].)
No
DTC troubleshooting completed.