Parking and Back-Up Sensor Control Unit Input Test
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.
Before testing, make sure the gauge 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. B5 (7.5 A) fuse in the under-dash fuse/relay box is OK.

1.
Press the engine start/stop button to select the OFF mode.

2.
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 look 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
24
GRN
Power mode ON
Connect to ground with a jumper wire:
The parking and back-up sensor switch indicator should come on.
Blown No. B5 (7.5 A) fuse in the under-dash fuse/relay box
Faulty LED
Faulty parking and back-up sensor switch
An open or high resistance in the wire
2
TAN
Disconnect the left front corner sensor 6P connector
Check for continuity between terminal No. 2 and left 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. 2 and body ground:
There should be no continuity.
A short to ground in the wire
6
PNK
Disconnect the left front corner sensor 6P connector
Check for continuity between terminal No. 6 and left 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. 6 and body ground:
There should be no continuity.
A short to ground in the wire
11
BLU
Disconnect the left front corner sensor 6P connector
Check for continuity between terminal No. 11 and left 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. 11 and body ground:
There should be no continuity.
A short to ground in the wire
3
GRY
Disconnect the right front corner sensor 6P connector
Check for continuity between terminal No. 3 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. 3 and body ground:
There should be no continuity.
A short to ground in the wire
14
BLU
Disconnect the left rear corner sensor 6P connector
Check for continuity between terminal No. 14 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. 14 and body ground:
There should be no continuity.
A short to ground in the wire
18
GRY
Disconnect the left rear corner sensor 6P connector
Check for continuity between terminal No. 18 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. 18 and body ground:
There should be no continuity.
A short to ground in the wire
23
TAN
Disconnect the right rear corner sensor 6P connector
Check for continuity between terminal No. 23 and right 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. 23 and body ground:
There should be no continuity.
A short to ground in the wire
17
PUR
Disconnect the left rear center sensor 6P connector
Check for continuity between terminal No. 17 and left rear center 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. 17 and body ground:
There should be no continuity.
A short to ground in the wire
16
BRN
Disconnect the right rear center sensor 6P connector
Check for continuity between terminal No. 16 and right rear center 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. 16 and body ground:
There should be no continuity.
A short to ground in the wire
15
YEL
Disconnect the right rear corner sensor 6P connector
Check for continuity between terminal No. 15 and right 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. 15 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.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
1
BRN
Power mode ON
Measure the voltage to ground:
There should be battery voltage.
Blown No. B5 (7.5 A) fuse in the under-dash fuse/relay box
An open or high resistance in the wire
9
BLK
All power modes
Check for continuity to ground:
There should be continuity.
Poor ground (G603)
An open or high resistance in the ground wire
12
BLK
All power modes
Check for continuity to ground:
There should be continuity.
Poor ground (G603)
An open or high resistance in the ground wire
13
YEL
Power mode ON, and parking and back-up sensor switch ON
Measure the voltage to ground:
There should be battery voltage.
Blown No. B5 (7.5 A) fuse in the under-dash fuse/relay box
Faulty parking and back-up sensor switch
An open or high resistance in the wire