Rear Redundant Control Module (RRCM) Diagnostic Trouble Code (DTC) Index
ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX
Symptom Chart
P1474 Low speed fan internal driver failure
REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P1479 High speed fan internal driver failure
REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
P1464 A/C demand out of self-test range
REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
DTC
Description
Action
B113D Rear climate control switch stuck
INSTALL a new rear climate control switch. TEST the system for normal operation.
B113E Rear climate control switch circuit short to ground
GO to Pinpoint Test O
.
B113F Rear climate control switch circuit short to battery
GO to Pinpoint Test P
.
U1178 SCP (J1850) Invalid or missing data for climate control REFER to
Section 418-00
to diagnose a network concern.
DTC
EATC Self-
Test Faults
Description
Action to take
B2266
2266
Driver side blend door failure or short
GO to Pinpoint Test A
.
B2267
2267
Passenger side blend door failure or
short
GO to Pinpoint Test A
.
B1251
1251
In-vehicle temperature sensor open
circuit
GO to Pinpoint Test B
.
B1253
1253
In-vehicle temperature sensor short to
ground
GO to Pinpoint Test B
.
B1255
1255
Ambient temperature sensor open
circuit
GO to Pinpoint Test C
.
B1257
1257
Ambient temperature sensor short to
ground
GO to Pinpoint Test C
.
B1259
1259
A/C solar radiation sensor open circuit
GO to Pinpoint Test D
.
B1261
1261
A/C solar radiation sensor circuit short
to ground
GO to Pinpoint Test D
.
B1242
1242
Recirc door short/failure
GO to Pinpoint Test E
.
B1263
1263
Panel/defrost door short/failure
GO to Pinpoint Test F
.
B1264
1264
Floor door short/failure
GO to Pinpoint Test F
.
B2268
2268
Steering wheel auxiliary control switch
open circuit
If vehicle is not equipped with steering wheel control switches, ignore this code and continue diagnosis. If vehicle is
equipped with steering wheel control switches,
GO to Pinpoint Test G
.
B2269
2269
Steering wheel auxiliary control switch
circuit short to ground
GO to Pinpoint Test G
.
U1040
1040
SCP invalid or missing data for
function read vehicle speed
If DTCs are present in the instrument cluster, diagnose those codes first. CLEAR the DTCs. If the EATC DTC returns,
INSTALL a new EATC module. REFER to
Section 412-01
.
If no DTCs are present in the instrument cluster, CLEAR the DTCs. If the EATC DTC returns, INSTALL a new EATC
module. REFER to
Section 412-01
. TEST the system for normal operation.
U1073
N/A
SCP invalid or missing data for engine
coolant
If DTCs are present in the instrument cluster, diagnose those codes first. CLEAR the DTCs. If the EATC DTC returns,
INSTALL a new EATC module. REFER to
Section 412-01
. TEST the system for normal operation.
If no DTCs are present in the instrument cluster, CLEAR the DTCs. If the EATC DTC returns, INSTALL a new EATC
module. REFER to
Section 412-01
. TEST the system for normal operation.
U1112
1112
SCP invalid or missing data for interior
lamps
GO to
Section 417-02
, Inspection and Verification to continue diagnosis.
B1342
1342
Module faulted
Button held too long may set DTC. Attempt to clean buttons. If code returns, INSTALL a new EATC module. REFER to
Section 412-01
.
B1200
1200
Stuck button
INSTALL a new EATC module. REFER to
Section 412-01
.
B2477
2477
Module not configured — LHD only
CONFIGURE the EATC module. REFER to
Section 418-01
.
B1676
1676
Voltage out of range
GO to Pinpoint Test H
.
SYMPTOM CHART
Condition
Possible Sources
Action
The steering wheel control
switch is inoperative/does not
operate correctly
Circuitry short/open
Steering wheel control
switch
EATC module
GO to Pinpoint Test G
.
No communication with the
electronic automatic
temperature control (EATC)
module
Fuse(s)
Circuitry short/open
EATC module
communication
network
GO to Pinpoint Test H
.
The EATC system is
inoperative, intermittent or
incorrect operation
Fuse(s)
Circuitry short/open
Input sensor(s)/erratic
input signals
Automatic temperature
control sensor hose
and elbow
GO to Pinpoint Test I
.
Insufficient air conditioning (A/C)
cooling
Restricted A/C
evaporator core orifice
GO to
Refrigerant System Tests
in this section.
Page 3 of 45
2006 Town Car Workshop Manual
12/30/2011
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS6G/~MUS~LEN/19/...
