DTC U0028:87 [REAR VEHICLE MONITORING SYSTEM]

id0902z2886700

DESCRIPTION

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

DETECTION CONDITION

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

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 I—Rear vehicle monitoring control module (RH) terminal A

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

•  Short to power supply in wiring harness between the following terminals:

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

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

•  Rear vehicle monitoring control module circuits are shorted to each other.

•  Open circuit in wiring harness between the following terminals:

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

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

•  Rear vehicle monitoring control module (LH) malfunction

•  Rear vehicle monitoring control module (RH) malfunction

DESCRIPTION	Communication error between rear vehicle monitoring control module (RH) and (LH)
DETECTION CONDITION	• Communication error between rear vehicle monitoring control module (RH) and (LH).
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 I—Rear vehicle monitoring control module (RH) terminal A ― Rear vehicle monitoring control module (LH) terminal L—Rear vehicle monitoring control module (RH) terminal C • Short to power supply in wiring harness between the following terminals: ― Rear vehicle monitoring control module (LH) terminal I—Rear vehicle monitoring control module (RH) terminal A ― Rear vehicle monitoring control module (LH) terminal L—Rear vehicle monitoring control module (RH) terminal C • Rear vehicle monitoring control module circuits are shorted to each other. • Open circuit in wiring harness between the following terminals: ― Rear vehicle monitoring control module (LH) terminal I—Rear vehicle monitoring control module (RH) terminal A ― Rear vehicle monitoring control module (LH) terminal L—Rear vehicle monitoring control module (RH) terminal C • Rear vehicle monitoring control module (LH) malfunction • Rear vehicle monitoring control module (RH) malfunction

System Wiring Diagram

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Diagnostic Procedure

STEP	INSPECTION		ACTION
1	INSPECT REAR VEHICLE MONITORING CONTROL MODULE (LH) AND (RH) CONNECTORS AND TERMINALS • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the rear vehicle monitoring control module (LH) and (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 7.
1		No	Go to the next step.
2	INSPECT CAN BUS CIRCUIT FOR SHORT TO GROUND • 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 I ― Rear vehicle monitoring control module (LH) terminal L • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 7.
2		No	Go to the next step.
3	INSPECT CAN BUS CIRCUIT FOR SHORT TO POWER SUPPLY • Rear vehicle monitoring control module (LH) and (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 I ― Rear vehicle monitoring control module (LH) terminal L • Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 7.
3		No	Go to the next step.
4	INSPECT CAN BUS CIRCUIT FOR SHORT TO EACH OTHER • Rear vehicle monitoring control module (LH) and (RH) connectors are disconnected. • Switch the ignition to off. • Disconnect the negative battery cable. • Inspect for continuity between rear vehicle monitoring control module (LH) terminal I and L (wiring harness-side). • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to each other, then go to Step 7.
4		No	Go to the next step.
5	INSPECT CAN BUS CIRCUIT FOR OPEN CIRCUIT • Rear vehicle monitoring control module (LH) and (RH) connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Rear vehicle monitoring control module (LH) terminal I—Rear vehicle monitoring control module (RH) terminal A ― Rear vehicle monitoring control module (LH) terminal L—Rear vehicle monitoring control module (RH) terminal C • Is there continuity?	Yes	Go to the next step.
5		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 7.
6	VERIFY REAR VEHICLE MONITORING CONTROL MODULE (LH) MALFUNCTION • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. • Clear the DTC from the rear vehicle monitoring control module using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].) • Verify the rear vehicle monitoring system DTC 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 Step 8.
7	VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Reconnect the negative battery cable. • Clear the DTC from the rear vehicle monitoring control module using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].) • Verify the rear vehicle monitoring system DTC 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.)
7		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. (See DTC TABLE [REAR VEHICLE MONITORING SYSTEM].)
8		No	DTC troubleshooting completed.