Pinpoint Test P: Dtc B113F Rear Climate Control Switch Circuit - Lincoln 2006 Town Car Workshop Manual

2006 Town Car Workshop Manual
Connect the properly seat all of the RRCM connectors.
Operate the system.
Does the concern return?
Pinpoint Test P: DTC B113F — Rear Climate Control Switch Circuit Short To Battery
Refer to Wiring Diagrams Cell 55, Automatic Climate Control System for schematic and connector information.
Normal Operation
Under normal operation, ground is provided to the rear climate switch through circuit 676 (PK/OG). When the switch pressed, ground through an internal resistor is sent to the rear
redundant control module (RRCM) through circuit 1349 (PK/LG).
Possible Causes
An open in circuit 676 (PK/OG) or 1349 (PK/LG)
A short to voltage in circuit 1349 (PK/LG)
Rear climate switch
PINPOINT TEST P: DTC B113E — REAR CLIMATE CONTROL SWITCH CIRCUIT SHORT TO BATTERY
P1 CHECK CIRCUIT 1349 (PK/LG) FOR AN OPEN
Ignition OFF.
Disconnect: Rear Redundant Control Module (RRCM) C3160a.
Disconnect: Rear climate control switch C3161.
Measure the resistance between RRCM C3160a-4 pin 4, circuit 1349 (PK/LG) and the rear climate
control switch C3161-2, circuit 1349 (PK/LG).
Is the resistance less than 5 ohms?
P2 CHECK CIRCUIT 1349 (PK/LG) FOR A SHORT TO VOLTAGE
Measure the voltage between rear climate control switch C3161-2, circuit 1349 (PK/LG) and
ground.
Is voltage present?
P3 CHECK CIRCUIT 676 (PK/OG) FOR GROUND
Measure the resistance between rear climate control switch C3161-3, circuit 676 (PK/OG) and
ground.
Is the resistance less than 5 ohms?
Component Tests
Temperature Sensor — Ambient
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS6G/~MUS~LEN/19/...
Test Step Result / Action to Take
Yes
GO to P2.
No
REPAIR circuit 1349 (PK/LG) for an open. CLEAR the DTCs. REPEAT
the self-test. TEST the system for normal operation.
Yes
REPAIR circuit 1349 (PK/LG) for a short to voltage. CLEAR the DTCs.
REPEAT the self-test. TEST the system for normal operation.
No
GO to P3.
Yes
INSTALL a new rear climate control switch. CLEAR the DTCs.
REPEAT the self-test. TEST the system for normal operation.
No
REPAIR circuit 676 (PK/OG) for an open. CLEAR the DTCs. REPEAT
the self-test. TEST the system for normal operation.
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12/30/2011