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/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/RH) malfunction

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/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/RH) malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	INSPECT REAR VEHICLE MONITORING CONTROL MODULE (LH/RH) CONNECTORS CONDITION • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the rear vehicle monitoring control module (LH/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 5.
1		No	Go to the next step.
2	INSPECT CAN BUS CIRCUIT FOR SHORT TO GROUND • Rear vehicle monitoring control module (LH/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 possible short to ground, then go to Step 5.
2		No	Go to the next step.
3	INSPECT CAN BUS CIRCUIT FOR SHORT TO POWER SUPPLY • Rear vehicle monitoring control module (LH/RH) connectors are disconnected. • Reconnect the negative battery cable. • 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 possible short to power supply, then go to Step 5.
3		No	Go to the next step.
4	INSPECT CAN BUS CIRCUIT FOR OPEN CIRCUIT • Rear vehicle monitoring control module (LH/RH) connectors are disconnected. • Switch the ignition to off. • Disconnect the negative battery cable. • 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.
4		No	Repair or replace the wiring harness for possible open circuit, then go to the next step.
5	VERIFY REAR VEHICLE MONITORING CONTROL MODULE (RH) MALFUNCTION • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. • Clear the DTC using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].) • Switch the ignition to ON and wait for 1.5 s or more. • Perform the DTC inspection using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].) • Is the same DTC present?	Yes	Replace the rear vehicle monitoring control module (RH), then go to the next step. (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
5		No	Go to Step 7.
6	VERIFY TROUBLESHOOTING COMPLETED • Clear the DTC using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].) • Switch the ignition to ON and wait for 1.5 s or more. • Perform the DTC inspection using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].) • Is the same DTC present?	Yes	Replace the rear vehicle monitoring control module (LH), then go to the next step. (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
6		No	Go to the next step.
7	VERIFY THAT NO OTHER DTCs ARE PRESENT • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [REAR VEHICLE MONITORING SYSTEM].)
7		No	DTC troubleshooting completed.