Diagnostic Procedure

DTC B1B46:2A (PARKING SENSOR CONTROL MODULE) DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	VERIFY IF ACCESSORY PART IS INSTALLED Verify if the following accessory part is installed to the vehicle. Trailer switch (option) Is an accessory part installed to the vehicle?	Yes	Go to the next step.
1		No	Go to Step 3.
2	VERIFY IF MALFUNCTIONING LOCATION IS ACCESSORY PART DEPENDING ON REPEATABILITY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Disconnect the connector of the following accessory part. Trailer switch (option) Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Clear the DTC for the parking sensor control module using the M-MDS. (See CLEARING DTC [POSITION MEMORY CONTROL MODULE] .) Retrieve the parking sensor control module DTCs using the M-MDS. (See DTC INSPECTION [POSITION MEMORY CONTROL MODULE] .) Is the same DTC displayed?	Yes	Go to the next step.
2		No	System is normal. (Explain to the customer that the malfunction occurred due to the accessory part installed to the vehicle.)
3	VERIFY OTHER PARKING SENSOR CONTROL MODULE DTCs Clear the DTC for the parking sensor control module using the M-MDS. (See CLEARING DTC [POSITION MEMORY CONTROL MODULE] .) Retrieve the parking sensor control module DTCs using the M-MDS. (See DTC INSPECTION [POSITION MEMORY CONTROL MODULE] .) Is DTC U3000:49 displayed?	Yes	Replace the parking sensor control module, then go to Step 7. (See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION .)
3		No	Go to the next step.
4	VERIFY IF REAR ULTRASONIC SENSOR (RH) CHARACTERISTIC DETERIORATES TEMPORARILY Clear the DTC for the parking sensor control module using the M-MDS. (See CLEARING DTC [POSITION MEMORY CONTROL MODULE] .) Retrieve the parking sensor control module DTCs using the M-MDS. (See DTC INSPECTION [POSITION MEMORY CONTROL MODULE] .) Is the same DTC displayed?	Yes	Go to the next step.
4		No	System is normal. (Explain to the customer that there is a temporary malfunction due to driving in a place where muddy water was splashed, or driving in a cold region.)
5	VERIFY REAR BUMPER EXTERNAL APPEARANCE AND INSTALLATION CONDITION Verify that the rear bumper external appearance and installation condition. Are the rear bumper external appearance and installation condition normal?	Yes	Go to the next step.
5		No	Repair or replace the rear bumper, then go to Step 7. (See REAR BUMPER REMOVAL/INSTALLATION .)
6	INSPECT REAR ULTRASONIC SENSOR (RH) SURFACE Visually inspect the rear ultrasonic sensor (RH) sensor for the following. Scratches Deformation Dirt Freezing Are there scratches, deformation, dirt or freezing on the rear ultrasonic sensor (RH)?	Yes	If there are scratches or deformation: Replace the rear ultrasonic sensor (RH), then go to the next step. (See REAR ULTRASONIC SENSOR REMOVAL/INSTALLATION .) If there is dirt or freezing: Remove dirt or freezing, then go to the next step.
6		No	Replace the rear ultrasonic sensor (RH), then go to the next step. (See REAR ULTRASONIC SENSOR REMOVAL/INSTALLATION .)
7	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Clear the DTC for the parking sensor control module using the M-MDS. (See CLEARING DTC [POSITION MEMORY CONTROL MODULE] .) Retrieve the parking sensor control module DTCs using the M-MDS. (See DTC INSPECTION [POSITION MEMORY CONTROL MODULE] .) Is the same DTC displayed?	Yes	Repeat the inspection from Step 3. If the malfunction recurs, replace the parking sensor control module. (See PARKING SENSOR CONTROL MODULE REMOVAL/INSTALLATION .) Go to the next step.
7		No	Go to the next step.
8	VERIFY IF OTHER DTCs DISPLAYED Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [PARKING SENSOR CONTROL MODULE] .)
8		No	DTC troubleshooting completed.