Pinpoint Test O: Dtc B113E Rear Climate Control Switch Circuit - Lincoln 2006 Town Car Workshop Manual

2006 Town Car Workshop Manual
Is the voltage greater than 1 volt?
N9 CHECK MODULE CONNECTION
Carry out the Electronic Automatic Temperature Control (EATC) Module Cold Boot
Process.
Carry out the EATC on-demand self test.
Operate the system.
Does the concern return?
Pinpoint Test O: DTC B113E — Rear Climate Control Switch Circuit Short To Ground
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 control 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
A short to ground in circuit 1349 (PK/LG)
Rear climate control switch
Rear redundant control module (RRCM)
PINPOINT TEST O: DTC B113E — REAR CLIMATE CONTROL SWITCH CIRCUIT SHORT TO GROUND
Test Step
O1 CHECK CIRCUIT 1349 (PK/LG) FOR GROUND
Ignition OFF.
Disconnect: Rear Redundant Control Module (RRCM) C3160a.
Measure the resistance between RRCM C3160a-4 pin 4, circuit 1349 (PK/LG)
and ground.
Is the resistance greater than 10,000 ohms?
O2 CHECK CIRCUIT 1349 (PK/LG) FOR A SHORT TO GROUND
Disconnect: Rear Climate Control Switch C3161.
Measure the resistance between RRCM C3160a-4 pin 4, circuit 1349 (PK/LG)
and ground.
Is the resistance greater than 10,000 ohms?
O3 CHECK RRCM MODULE CONNECTION
Clear the DTCs.
Disconnect all of the RRCM connectors.
Check for:
corrosion.
pushed-out connectors.
incorrectly seated connector.
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS6G/~MUS~LEN/19/...
Yes
INSTALL a new EATC module. REFER to
normal operation.
No
The system is operating correctly at this time. The concern may have been caused by
a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. TEST the
system for normal operation.
Result / Action to Take
Yes
GO to O2.
No
GO to O3.
Yes
INSTALL a new rear climate control switch. CLEAR the DTCs. REPEAT the self-test. TEST
the system for normal operation.
No
REPAIR circuit 1349 (PK/LG) for a short to ground. CLEAR the DTCs. REPEAT the self-
test. TEST the system for normal operation.
Yes
INSTALL a new RRCM. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a
loose or corroded connector.
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Section 412-01. TEST the system for
12/30/2011