DTC B1008:62 [FRONT BODY CONTROL MODULE (FBCM)]

id0902p2006500

System malfunction location

Windshield wiper LO switch signal mismatch
Detection condition
•  The front body control module (FBCM) and start stop unit signals are compared and it is detected that the signals do not match for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe
•  If the windshield wiper switch position which is monitored by the LO/HI detection function of the front body control module (FBCM) does not match the one which is sent from the start stop unit as a CAN signal, the windshield wipers are controlled according to the CAN signal for a certain period of time. After a certain period of time has elapsed, they are controlled as follows:
―  When the front body control module (FBCM) detects LO/HI ON using the LO/HI detection function: The windshield wipers are operated at low speed.
―  When the front body control module (FBCM) detects LO/HI OFF using the LO/HI detection function: The windshield wipers are stopped at the park position.
Possible cause
•  Start stop unit malfunction
•  Wiper switch malfunction
•  Short circuit to ground in wiring harness between start stop unit and front body control module (FBCM)
•  Open circuit in wiring harness between start stop unit and front body control module (FBCM)
•  Short to power supply in wiring harness between start stop unit and front body control module (FBCM)
•  Front body control module (FBCM) malfunction

Diagnostic Procedure

Step

Inspection

Action
1
INSPECT IF MALFUNCTION CAUSE IS START STOP UNIT OR FRONT BODY CONTROL MODULE (FBCM)
•  Display start stop unit PID WIP_F_LOW using the M-MDS.
•  Verify the PID while operating the wiper switch.
•  Is the PID WIP_F_LOW displayed normally?
Yes
Go to Step 3.
No
Go to the next step.
2
INSPECT WIPER SWITCH
•  Inspect the wiper switch.
•  Is the wiper switch normal?
Yes
Replace the start stop unit, then go to Step 7.
(See START STOP UNIT REMOVAL/INSTALLATION.)
No
Replace the wiper and washer switch, then go to Step 7.
(See WIPER AND WASHER SWITCH REMOVAL/INSTALLATION.)
3
INSPECT IF MALFUNCTION CAUSE IS FRONT BODY CONTROL MODULE (FBCM) OR WIRING HARNESS
•  Display the front body control module (FBCM) PID WIP_F using the M-MDS.
•  Verify the PID while operating the wiper switch.
•  Is the PID WIP_F displayed normally?
Yes
Go to the next step.
No
•  Perform the CAN malfunction diagnosis flow and inspect the CAN for a malfunction.
•  If there is no malfunction in the CAN, replace the front body control module (FBCM), then go to Step 7.
4
INSPECT FOR SHORT TO GROUND BETWEEN WIPER SWITCH AND FRONT BODY CONTROL MODULE (FBCM)
•  Switch the wiper switch off.
•  Inspect for continuity between front body control module (FBCM) terminal 2Y and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 7.
No
Go to the next step.
5
INSPECT WIRING HARNESS BETWEEN WIPER SWITCH AND FRONT BODY CONTROL MODULE (FBCM) FOR OPEN CIRCUIT
•  Disconnect the front body control module (FBCM) connector.
•  Disconnect the start stop unit connector.
•  Inspect for continuity between front body control module (FBCM) terminal 2Y and start stop unit terminal 1V.
•  Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 7.
No
Go to the next step.
6
INSPECT FOR SHORT TO POWER SUPPLY BETWEEN WIPER SWITCH AND FRONT BODY CONTROL MODULE (FBCM)
•  Verify that the front body control module (FBCM) and start stop unit connectors are disconnected.
•  Connect the negative battery cable.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at front body control module (FBCM) terminal 2Y (vehicle wiring harness side).
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Repair or replace the wiring harness and go to the next step.
7
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Clear the front body control module (FBCM) DTCs using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Perform the front body control module (FBCM) DTC inspection using the M-MDS.
•  Is DTC B1008:62 displayed?
Yes
Replace the front body control module (FBCM), then go to the next step.
(See FRONT BODY CONTROL MODULE (FBCM) REMOVAL/INSTALLATION.)
No
Go to the next step.
8
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [FRONT BODY CONTROL MODULE (FBCM)].)
No
DTC troubleshooting completed.