Parking And Back-Up Sensor Control Unit (2019 2020 2021)
NOTE:
- Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.
- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to:
- Before testing, make sure the gauge self-diagnostic function Gauges Control Module Self-Diagnostic Function to make sure the beeper in the gauge control module work properly, and communication line checks are OK.
- Before testing, make sure the No. C29 - Fuse to Components Index (With Auto Idle Stop System) fuse is OK.
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the parking and back-up sensor control unit 16P connector.
Parking and Back-Up Sensor Control Unit 16P Connector (female terminals)
3. Inspect the connector and socket terminals to be sure they are all making good contact:
- If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
- If the terminals are OK, go to step 4.
4. With the connector still disconnected, do the following input tests:
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 5.
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 5 | BLU | Vehicle ON mode | Connect to ground with a jumper wire: The parking and back-up sensor switch indicator should come on. |
|
| 7 | PNK | Disconnect the right front corner sensor 6P connector | Check for continuity between terminal No. 7 and right front corner sensor 6P connector terminal No. 6: There should be continuity. |
An open or high resistance in the wire |
| Check for continuity between the terminal No. 7 and body ground: There should be no continuity. |
A short to ground in the wire | |||
| 6 | YEL | Disconnect the right front corner sensor 6P connector | Check for continuity between terminal No. 6 and right front corner sensor 6P connector terminal No. 4: There should be continuity. |
An open or high resistance in the wire |
| Check for continuity between the terminal No. 6 and body ground : There should be no continuity. |
A short to ground in the wire | |||
| 13 | WHT | Disconnect the right front corner sensor 6P connector | Check for continuity between terminal No. 13 and right front corner sensor 6P connector terminal No. 2: There should be continuity. |
An open or high resistance in the wire |
| Check for continuity between the terminal No. 13 and body ground: There should be no continuity. |
A short to ground in the wire | |||
| 16 | LT GRN | Disconnect the left rear corner sensor 6P connector | Check for continuity between terminal No. 16 and left rear corner sensor 6P connector terminal No. 6: There should be continuity. |
An open or high resistance in the wire |
| Check for continuity between the terminal No. 16 and body ground: There should be no continuity. |
A short to ground in the wire | |||
| 12 | TAN | Disconnect the left rear corner sensor 6P connector | Check for continuity between terminal No. 12 and left rear corner sensor 6P connector terminal No. 2: There should be continuity. |
An open or high resistance in the wire |
| Check for continuity between the terminal No. 12 and body ground: There should be no continuity. |
A short to ground in the wire | |||
| 14 | PUR | Disconnect the left rear corner sensor 6P connector | Check for continuity between terminal No. 14 and left rear corner sensor 6P connector terminal No. 4: There should be continuity. |
An open or high resistance in the wire |
| Check for continuity between the terminal No. 14 and body ground: There should be no continuity. |
A short to ground in the wire |
5. Reconnect the connector, and do the following input tests:
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, replace the Parking and Back-Up Sensor Control Unit - Removal and Installation .
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 8 | GRN | Vehicle ON mode | Measure the voltage to ground: There should be battery voltage. |
|
| 4 | BLK | In all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
|
| 15 | LT BLU | Vehicle ON mode, and parking and back-up sensor switch ON | Measure the voltage to ground: There should be battery voltage. |
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