Lincoln 2006 Town Car Workshop Manual page 26

2006 Town Car Workshop Manual
Press each steering wheel auxiliary control switch and compare the resistance reading to
the chart below.
Switch Resistance (ohms)
TEMP UP 379-387
TEMP DOWN 1695-1730
NO FUNCTION 4468-4558
Are the resistance readings within the range?
G3 CHECK CIRCUIT 1070 (BN/LB) FOR A SHORT TO GROUND
Disconnect: Steering Wheel Control Switch.
Measure the resistance between EATC module C228b-7, circuit 1070 (BN/LB) and ground.
Is the resistance reading less than 10,000 ohms?
G4 CHECK CIRCUIT 1070 (BN/LB) FOR AN OPEN
Disconnect: Steering Wheel Auxiliary Control Switch.
Measure the resistance between EATC module C228b-7, circuit 1070 (BN/LB) and
steering wheel auxiliary control switch C2208-6, circuit 1070 (BN/LB).
Is the resistance less than 5 ohms?
G5 CHECK CIRCUIT 57 (BK) FOR AN OPEN
Measure the resistance between steering wheel auxiliary control switch C2208-3, circuit 57
(BK) and ground.
Is the resistance less than 5 ohms?
G6 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?
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS6G/~MUS~LEN/19/...
No
INSTALL a new steering wheel auxiliary control switch. CLEAR the DTCs.
REPEAT the self-test. TEST the system for normal operation.
Yes
REPAIR circuit 1070 (BN/LB) for a short to ground. CLEAR the DTCs. REPEAT
the self-test. TEST the system for normal operation.
No
INSTALL a new steering wheel auxiliary control switch. CLEAR the DTCs.
REPEAT the self-test. TEST the system for normal operation.
Yes
GO to G5.
No
REPAIR circuit 1070 (BN/LB) for an open. CLEAR the DTCs. REPEAT the self-
test. TEST the system for normal operation.
Yes
INSTALL a new steering wheel auxiliary control switch. CLEAR the DTCs.
REPEAT the self-test. TEST the system for normal operation.
No
REPAIR circuit 57 (BK) for an open. CLEAR the DTCs. REPEAT the self-test.
TEST the system for normal operation.
Yes
INSTALL a new EATC module. REFER to Section
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.
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412-01. TEST the system for
12/30/2011