DTC U0028:87 [REAR VEHICLE MONITORING SYSTEM]


id0902z2886700

DESCRIPTION

Communication error between rear vehicle monitoring control module (LH) and (RH)

DETECTION CONDITION
•  Communication error between rear vehicle monitoring control module (LH) and (RH) for 1 s or more.
POSSIBLE CAUSE
•  Rear vehicle monitoring control module (LH) connector or terminals malfunction
•  Rear vehicle monitoring control module (RH) connector or terminals malfunction
•  Short to ground in wiring harness between the following terminals:
―  Rear vehicle monitoring control module (LH) terminal L—Rear vehicle monitoring control module (RH) terminal C
―  Rear vehicle monitoring control module (LH) terminal I—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—Rear vehicle monitoring control module (RH) terminal C
―  Rear vehicle monitoring control module (LH) terminal I—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—Rear vehicle monitoring control module (RH) terminal C
―  Rear vehicle monitoring control module (LH) terminal I—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 CONDITION
•  Switch the ignition to off.
•  Disconnect the rear vehicle monitoring control module (LH) connectors.
•  Inspect the connectors and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 6.
No
Go to the next step.
2
INSPECT REAR VEHICLE MONITORING CONTROL MODULE (RH) CONNECTOR CONDITION
•  Disconnect the rear vehicle monitoring control module (RH) connectors.
•  Inspect the connectors and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 6.
No
Go to the next step.
3
INSPECT CAN BUS CIRCUIT FOR SHORT TO GROUND
•  Verify that the rear vehicle monitoring control module (LH) and (RH) connectors are disconnected.
•  Inspect for continuity between the following terminals (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 for a possible short to ground, then go to Step 6.
No
Go to the next step.
4
INSPECT CAN BUS CIRCUIT FOR SHORT TO POWER SUPPLY
•  Verify that the rear vehicle monitoring control module (LH) and (RH) connectors are disconnected.
•  Switch the ignition to ON.
•  Measure the voltage at the following terminals (wiring harness-side):
―  Rear vehicle monitoring control module (LH) terminal L
―  Rear vehicle monitoring control module (LH) terminal I
•  Is there any voltage?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to Step 6.
No
Go to the next step.
5
INSPECT CAN BUS CIRCUIT FOR OPEN CIRCUIT
•  Verify that the rear vehicle monitoring control module (LH) and (RH) connectors are disconnected.
•  Switch the ignition to off.
•  Inspect for continuity between the following terminals (wiring harness-side):
―  Rear vehicle monitoring control module (LH) terminal L—Rear vehicle monitoring control module (RH) terminal C
―  Rear vehicle monitoring control module (LH) terminal I—Rear vehicle monitoring control module (RH) terminal A
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to the next step.
6
PERFORM DTC INSPECTION AND VERIFY THAT MALFUNCTIONING PART IS REAR VEHICLE MONITORING CONTROL MODULE (LH)
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from rear vehicle monitoring control module using the M-MDS.
•  Switch the ignition to ON and wait for 1.5 s or more.
•  Perform the rear vehicle monitoring control module DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the rear vehicle monitoring control module (LH).
Go to the next step.
No
Go to Step 8.
7
VERIFY TROUBLESHOOTING COMPLETED
•  Clear the DTC from rear vehicle monitoring control module using the M-MDS.
•  Switch the ignition to ON and wait for 1.5 s or more.
•  Perform the rear vehicle monitoring control module DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Replace the rear vehicle monitoring control module (RH), then go to the next step.
No
Go to the next step.
8
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.