DTC B1B38:14 [PARKING ASSIST UNIT]

id0902q6240600

Caution
•  Vehicle specifications differ depending on the vehicle identification number (VIN).
Type A VIN:
?  JM0 TC2WLA*# 100001—299999
?  JM0 TC4WLA*# 100001—299999
?  JMZ TB5WYA*# 100001—599999
?  JMZ TB6WYA*# 100001—599999
?  JMZ TBEWYA*# 100001—599999
?  JMZ TBFWYA*# 100001—599999
?  JM7 TC2WLA*# 100001—299999
?  JM7 TC4WLA*# 100001—299999
?  JM5 TCAWY**# 100001—299999
?  JM6 TC2WLA*# 100001—299999
?  JM6 TC4WLA*# 100001—299999
Type B VIN:
?  JM0 TC2WLA*# 300001—399999
?  JM0 TC4WLA*# 300001—399999
?  JMZ TB5WYA*# 600001—
?  JMZ TB6WYA*# 600001—
?  JMZ TBEWYA*# 600001—699999
?  JMZ TBFWYA*# 600001—699999
?  JM7 TC2WLA*# 300001—399999
?  JM7 TC4WLA*# 300001—399999
?  JM5 TCAWY**# 300001—399999
?  JM6 TC2WLA*# 300001—399999
?  JM6 TC4WLA*# 300001—399999
Type C VIN:
?  JM0 TC2WLA*# 400001—
?  JM0 TC4WLA*# 400001—
?  JM5 TCAWY**# 400001—
?  JM6 TC2WLA*# 400001—
?  JM6 TC4WLA*# 400001—
?  JM7 TC2WLA*# 400001—
?  JM7 TC4WLA*# 400001—
?  JMZ TBEWYA*# 700001—
?  JMZ TBFWYA*# 700001—

Description

Front ultrasonic sensor (RH) circuit malfunction
Detection condition
•  The parking assist unit detected a front ultrasonic sensor (RH) circuit malfunction with the ignition switched ON (engine off or on).
Fail-safe
Not applicable
Possible cause
•  Front bumper external appearance damage or incorrect front bumper installation
?  Abnormal front bumper installation angle
•  Front ultrasonic sensor (RH) malfunction
•  Front ultrasonic sensor (RH) connector or terminal malfunction
•  Parking assist unit connector or terminal malfunction
•  Short to ground in wiring harness between the following terminals:
?  L.H.D. (Type A VIN/Type B VIN)
•  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal J
•  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
?  L.H.D. (Type C VIN) or R.H.D.
•  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal N
•  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
•  Short to power supply in wiring harness between the following terminals:
?  L.H.D. (Type A VIN/Type B VIN)
•  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal J
•  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
?  L.H.D. (Type C VIN) or R.H.D.
•  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal N
•  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
•  Open circuit in wiring harness between the following terminals:
?  L.H.D. (Type A VIN/Type B VIN)
•  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal J
•  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
?  L.H.D. (Type C VIN) or R.H.D.
•  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal N
•  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
•  Parking assist unit malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY OTHER PARKING ASSIST UNIT DTCs
•  Clear the DTC for the parking assist unit using the M-MDS.
•  Retrieve the parking assist unit DTCs using the M-MDS.
•  Is DTC U3000:49 displayed?
Yes
Replace the parking assist unit, then go to Step 9.
(See PARKING ASSIST UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
2
VERIFY FRONT BUMPER EXTERNAL APPEARANCE AND INSTALLATION CONDITION
•  Verify that the front bumper external appearance and installation condition.
•  Are the front bumper external appearance and installation condition normal?
Yes
Go to the next step.
No
Repair or replace the front bumper, then go to Step 9.
(See FRONT BUMPER REMOVAL.)
(See FRONT BUMPER INSTALLATION.)
3
PERFORM DTC INSPECTION AND VERIFY FRONT ULTRASONIC SENSOR (RH) MALFUNCTION
Note
•  If the left sensor is switched with the right sensor and the output DTC changes, there is a malfunction in the front ultrasonic sensor (RH) before the positions were switched.
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the front ultrasonic sensor (LH) connector and the front ultrasonic sensor (RH) connector.
•  Switch the front ultrasonic sensor (LH) with the front ultrasonic sensor (RH).
•  Always reconnect all disconnected connectors.
•  Connect the negative battery terminal.
•  Clear the DTC for the parking assist unit using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Retrieve the parking assist unit DTCs using the M-MDS.
•  Is DTC B1B38:14 or B1B42:14 displayed?
Yes
If DTC B1B38:14 is displayed:
•  Go to the next step.
If DTC B1B42:14 is displayed:
•  Replace the front ultrasonic sensor (RH) (front ultrasonic sensor (LH) before switching), then go to Step 9.
No
Return the switched sensor to its original position, and perform the DTC inspection for the parking assist unit.
(See FRONT ULTRASONIC SENSOR REMOVAL/INSTALLATION.)
(See DTC INSPECTION [PARKING ASSIST UNIT].)
If DTC B1B38:14 is displayed:
•  Go to the next step.
If DTC B1B38:14 is not displayed:
•  Go to Step 10.
4
INSPECT FRONT ULTRASONIC SENSOR (RH) CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the front ultrasonic sensor (RH) connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector, then go to Step 9.
5
INSPECT PARKING ASSIST UNIT CONNECTOR CONDITION
•  Disconnect the parking assist unit connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector, then go to Step 9.
6
INSPECT FRONT ULTRASONIC SENSOR (RH) CIRCUIT FOR SHORT TO GROUND
•  Verify that the front ultrasonic sensor (RH) and parking assist unit connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
?  Front ultrasonic sensor (RH) terminal A
?  Front ultrasonic sensor (RH) terminal B
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  L.H.D. (Type A VIN/Type B VIN)
?  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal J
?  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
•  L.H.D. (Type C VIN) or R.H.D.
?  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal N
?  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
Go to Step 9.
No
Go to the next step.
7
INSPECT FRONT ULTRASONIC SENSOR (RH) CIRCUIT FOR SHORT TO POWER SUPPLY
•  Verify that the front ultrasonic sensor (RH) and parking assist unit connectors are disconnected.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the following terminals (wiring harness-side):
?  Front ultrasonic sensor (RH) terminal A
?  Front ultrasonic sensor (RH) terminal B
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  L.H.D. (Type A VIN/Type B VIN)
?  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal J
?  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
•  L.H.D. (Type C VIN) or R.H.D.
?  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal N
?  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to power supply.
Go to Step 9.
8
INSPECT FRONT ULTRASONIC SENSOR (RH) CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Verify that the front ultrasonic sensor (RH) and parking assist unit connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side):
?  L.H.D. (Type A VIN/Type B VIN)
•  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal J
•  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
?  L.H.D. (Type C VIN) or R.H.D.
•  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal N
•  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  L.H.D. (Type A VIN/Type B VIN)
?  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal J
?  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
•  L.H.D. (Type C VIN) or R.H.D.
?  Front ultrasonic sensor (RH) terminal A—Parking assist unit terminal N
?  Front ultrasonic sensor (RH) terminal B—Parking assist unit terminal M
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to the next step.
9
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Connect the negative battery terminal.
•  Clear the DTC for the parking assist unit using the M-MDS.
•  Retrieve the parking assist unit DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the parking assist unit.
Go to the next step.
No
Go to the next step.
10
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 ASSIST UNIT].)
No
DTC troubleshooting completed.