PERFORM MALFUNCTION DIAGNOSIS FOR INHIBIT/LIMIT [PARKING ASSIST UNIT]

id0902q6243300

Note

• If the smart city brake support [reverse] (SCBS R) does not operate, the system operation may be inhibited pursuant to the inhibit/limit conditions. Verify if the system is pursuant to the inhibit/limit conditions and perform the applicable malfunction diagnosis for the inhibit/limit conditions according to the applicable condition verification procedure for the inhibit/limit conditions.

Applicable Conditions Verification Procedure For Inhibit/Limit

1. Using the M-MDS, display the following PIDs for the parking assist unit.

(See PID/DATA MONITOR INSPECTION [PARKING ASSIST UNIT].)

• PRHB_BATT

? Inhibit/limit: Power supply voltage

• PRHB_DTC

? Inhibit/limit: DTC

• PRHB_FACTORY

? Inhibit/limit: Factory shipment mode

• PRHB_PCM

? Inhibit/limit: PCM

• PRHB_SCBS

? Inhibit/limit: Smart city brake support [forward] (SCBS F) malfunction

• PRHB_SCBS_SW

? Inhibit/limit: Parking sensor switch

• PRHB_SLOPE

? Inhibit/limit: Road slope

• PRHB_STEER

? Inhibit/limit: Steering angle

• PRHB_TEMP

? Inhibit/limit: Ambient temperature

• PRHB_TOWBAR/PRHB_TRAIL

? Inhibit/limit: Trailer switch (option)

2. Verify if the monitoring value is indicated as "Yes".

There is no indication of "Yes":

• System is normal. (Explain to the customer that the smart city brake support [reverse] (SCBS R) is not restricted by the inhibit/limit conditions.)

If there is "Yes" indicated:

• Perform the malfunction diagnosis for the inhibit/limit conditions for the PID indicated by a "Yes".

Perform Malfunction Diagnosis For Inhibit/Limit

Power supply voltage

• Control is inhibited because the input voltage to the parking assist unit is high.

Step	Inspection		Action
1	VERIFY PARKING ASSIST UNIT DTCs • Retrieve the parking assist unit DTCs using the M-MDS. (See DTC INSPECTION [PARKING ASSIST UNIT].) • Is DTC U3003:16 or U3003:17 displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC U3003:16 [PARKING ASSIST UNIT].) (See DTC U3003:17 [PARKING ASSIST UNIT].)
1		No	System is normal.

DTC

• Control is inhibited because the parking assist unit detects a malfunction related to the smart city brake support [reverse] (SCBS R).

Step	Inspection		Action
1	VERIFY PARKING ASSIST UNIT DTCs • Retrieve the parking assist unit DTCs using the M-MDS. (See DTC INSPECTION [PARKING ASSIST UNIT].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [PARKING ASSIST UNIT].)
1		No	System is normal.

Factory shipment mode

• Control is inhibited because the mode is set to the factory shipment mode.

Step	Inspection		Action
1	Verify the ROOM 25 A fuse. • Verify that the ROOM 25 A fuse is installed to the relay and fuse block. • Is the ROOM 25 A fuse installed correctly?	Yes	Note • If all of the following conditions are not met after replacing the instrument cluster, the factory shipment mode setting is maintained and the smart city brake support [reverse] (SCBS R) is inhibited. ? Traveled distance is less than 50 km {31 mile} ? Number of times ignition is switched ON/OFF is less than 60 times Switch the ignition ON/OFF 60 times or more.
1		No	If the fuse is blown: • Replace the fuse. If a fuse is not installed: • Install the fuse.

PCM

• Control is inhibited because an internal malfunction in the PCM or information required for control from the PCM via CAN communication cannot be received normally.

Step	Inspection		Action
1	VERIFY PCM DTCs • Retrieve the PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
1		No	System is normal.

Smart city brake support [forward] (SCBS F) malfunction

• Control is inhibited because an internal malfunction in the laser sensor or information required for control from the forward sensing camera (FSC) via CAN communication cannot be received normally.

Step	Inspection		Action
1	VERIFY FORWARD SENSING CAMERA (FSC) DTCs • Retrieve the forward sensing camera (FSC) DTCs using the M-MDS. (See DTC INSPECTION [FORWARD SENSING CAMERA (FSC)].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [FORWARD SENSING CAMERA (FSC)].)
1		No	System is normal.

Parking sensor switch

• Control is inhibited by the parking sensor switch operation.

Step	Inspection		Action
1	VERIFY PARKING SENSOR SWITCH OPERATION CONDITION • Ask the customer if the smart city brake support [forward] (SCBS F) has not been inhibited by operating the parking sensor switch. • Has the parking sensor switch been operated?	Yes	System is normal. (Explain to the customer that the smart city brake support [reverse] (SCBS R) is also inhibited if the smart city brake support [forward] (SCBS F) is inhibited by operating the parking sensor switch.)
1		No	Go to the next step.
2	VERIFY INSTRUMENT CLUSTER DTCs • Retrieve the instrument cluster DTCs using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER].) • Is DTC U2013:13 displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC U2013:13 [INSTRUMENT CLUSTER].)
2		No	System is normal.

Road slope

• Control is inhibited because the road slope is the specified value or more.

Step	Inspection		Action
1	VERIFY DSC HU/CM DTCs • Retrieve the DSC HU/CM DTCs using the M-MDS. (See DTC INSPECTION [DSC HU/CM].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [DSC HU/CM].)
1		No	Go to the next step.
2	VERIFY SAS CONTROL MODULE DTCs • Retrieve the SAS control module DTCs using the M-MDS. (See DTC INSPECTION [SAS CONTROL MODULE].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [SAS CONTROL MODULE].)
2		No	System is normal. (Explain to the customer that the system does not operate if the road slope is the specified value or more.)

Steering angle

• Control is inhibited because the steering angle is the specified value or more.

Step	Inspection		Action
1	VERIFY EPS CONTROL MODULE DTCs • Retrieve the EPS control module DTCs using the M-MDS. (See DTC INSPECTION [ELECTRIC POWER STEERING (EPS)].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [ELECTRIC POWER STEERING (EPS)].)
1		No	System is normal. (Explain to the customer that the system does not operate if the steering angle is the specified value or more.)

Ambient temperature

• Control is inhibited because the ambient temperature received from the PCM via CAN communication is too low.

Step	Inspection		Action
1	VERIFY PCM DTCs • Retrieve the PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
1		No	system is normal. (Explain to the customer that the system does not operate if the ambient temperature is ?30 °C {?22 °F} or less.)

Trailer switch (optional)

• Control is inhibited because the trailer switch (optional) is installed on the vehicle and the trailer switch (optional) is turned on.

Step	Inspection		Action
1	VERIFY TRAILER SWITCH (OPTION) INSTALLATION CONDITION • Ask the customer if the trailer switch (option) is installed. • Is the trailer switch (optional) installed?	Yes	Go to the next step.
1		No	PRHB_TOWBAR is "Yes": • There is a short circuit to ground in the parking assist unit terminal T-related circuit. ? Repair or replace the wiring harness which has a short to ground. PRHB_TRAIL is "Yes": • There is a short circuit to ground in the parking assist unit terminal R-related circuit. ? Repair or replace the wiring harness which has a short to ground.
2	VERIFY IF TRAILER SWITCH (OPTION) IS TURNED ON • Verify the trailer switch (option) on/off condition. • Is the trailer switch (option) turned on?	Yes	System is normal. (Explain to the customer that the smart city brake support [reverse] (SCBS R) is inhibited because the trailer switch (option) is turned on.)
2		No	PRHB_TOWBAR is "Yes": • There is a short circuit to ground in the circuit between parking assist unit terminal T and the trailer switch (option). ? Repair or replace the wiring harness which has a short to ground. PRHB_TRAIL is "Yes": • There is a short circuit to ground in the circuit between parking assist unit terminal R and the trailer switch (option). ? Repair or replace the wiring harness which has a short to ground.