B10B9–CABIN HEATER 2 CONTROL CIRCUIT HIGH (FCM)





For a complete wiring diagram Refer to Section 8W


  • When Monitored:

    With the ignition on and the PTC No. 2 Relay command on.

  • Set Condition:

    If the Front Control Module (FCM) detects that the (K361) PTC No. 2 Relay Control circuit voltage is shorted to voltage.


Possible Causes
  
(K361) PTC NO. 2 RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE
  
(K361) PTC NO. 2 RELAY CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
  
PTC NO. 2 RELAY
  
FRONT CONTROL MODULE (FCM)
  



Diagnostic Test

1.VERIFY THAT THE DTC IS ACTIVE

WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.

NOTE: If the FCM detects and stores a DTC, the FCM also stores the environmental conditions under which the DTC was set.

NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.








Is the status Active for this DTC?

Yes
  • Go To 2


No
  • Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.

2.CHECK PTC NO. 2 RELAY









NOTE: The scan tool should display an open circuit DTC with the PTC No. 2 Relay removed.



Does the scan tool display: B10B9–CABIN HEATER 2 CONTROL CIRCUIT HIGH?

Yes
  • Go To 3


No

3.CHECK (K361) PTC NO. 2 RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE










Is there any voltage present?

Yes


No
  • Go To 4

4.CHECK (K361) PTC NO. 2 RELAY CONTROL FOR AN OPEN OR HIGH RESISTANCE






Is the resistance below 10.0 ohms?

Yes
  • Go To 5


No

5.INSPECT RELATED WIRING & CHECK FOR TSBs






Were any problems found?

Yes


No