Lincoln 2006 Town Car Workshop Manual
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Lincoln 2006 Town Car Workshop Manual

Lincoln 2006 Town Car Workshop Manual

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2006 Town Car Workshop Manual
SECTION 412-00: Climate Control System — General Information and Diagnostics
DIAGNOSIS AND TESTING
Climate Control System
Printable View (966 KB)
Special Tool(s)
A/C Flush Adapter Kit
219-00074 or equivalent
Flex Probe Kit
300-NUD105-R025DE or equivalent
Fluke 77-IV Digital Multimeter
FLU77-4 or equivalent
Pressure Test Kit
014-R1072 or equivalent
R-134a Manifold Gauge Set
176-R032A or equivalent
Refrigerant Leak Detector
216-00001 or equivalent
Set, A/C Fittings
412-DS028 (014-00333, D93L-19703-B) or equivalent
Test Light
SGT27000 or equivalent 250 mA incandescent bulb test lamp
Vacuum Pump Kit
416-D002 (D95L-7559-A) or equivalent
Worldwide Diagnostic System (WDS)
Vehicle Communication Module (VCM) with appropriate adapters, or
equivalent diagnostic tool

Inspection and Verification

1. Verify the customer's concern by operating the climate control system to duplicate the condition.
2. Inspect to determine if one of the following mechanical or electrical concerns apply:
Visual Inspection Chart
Mechanical
Loose, missing or damaged A/C compressor drive belt
Loose or disconnected A/C clutch
Broken or binding door/actuator
Broken or leaking refrigerant lines
Obstructed in-vehicle temperature sensor
Disconnected in-vehicle temperature aspirator hose
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS6G/~MUS~LEN/19/...
Electrical
Central junction box (CJB) fuse:
9 (7.5A)
15 (10A)
27 (10A)
31 (10A)
Battery junction box (BJB) fuse:
101 (40A)
11 (15A)
Page 1 of 45
2006 Town Car Workshop Manual
Procedure revision date: 08/12/2009
12/30/2011

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May 4, 2025

location of HVAC fuse to reset HVAC Module

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Summary of Contents for Lincoln 2006 Town Car

  • Page 1 2006 Town Car Workshop Manual Page 1 of 45 SECTION 412-00: Climate Control System — General Information and Diagnostics 2006 Town Car Workshop Manual DIAGNOSIS AND TESTING Procedure revision date: 08/12/2009 Climate Control System Printable View (966 KB) Special Tool(s)
  • Page 2 2006 Town Car Workshop Manual Page 2 of 45 21 (15A) Blower motor inoperative A/C compressor inoperative Circuitry open/shorted Disconnected electrical connectors Cooling fan inoperative 3. As pinpoint tests and measurements are being carried out, be sure to inspect for any disconnected, loose-fitting or incorrectly installed component, module and in-line electrical connectors and pins.
  • Page 3 2006 Town Car Workshop Manual Page 3 of 45 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.
  • Page 4 2006 Town Car Workshop Manual Page 4 of 45 Low refrigerant level A/C cycling switch Temperature blend door actuator control Insufficient, erratic or no heat Low engine coolant GO to Pinpoint Test level Engine overheating Plugged or partially plugged heater core...
  • Page 5 2006 Town Car Workshop Manual Page 5 of 45 PINPOINT TEST A: DTC B2266 OR B2267 Test Step Result / Action to Take A1 CHECK THE FEEDBACK POTENTIOMETER TOTAL RESISTANCE Disconnect: HVAC Module C228a. Disconnect: HVAC Module C228b. For DTC B2266,GO to A2.
  • Page 6 2006 Town Car Workshop Manual Page 6 of 45 Is the resistance between 250 and 5,500 ohms? A4 CHECK CIRCUITS 436 (RD/LG), 437 (YE/LG) AND 1122 (RD) FOR A SHORT TO GROUND Measure the resistance between ground and the following: HVAC module C228b-8, circuit 436 (RD/LG), harness side.
  • Page 7 2006 Town Car Workshop Manual Page 7 of 45 Remove the fused jumpers when the resistance does not change. Connect a fused jumper wire between: HVAC module C228a-13, circuit 246 (VT), harness side and HVAC module C228b-11, circuit 1566 (RD/YE), harness side.
  • Page 8 2006 Town Car Workshop Manual Page 8 of 45 Does the resistance smoothly increase and/or decrease when the jumpers are connected? A8 CHECK THE ACTUATOR MOTOR DRIVE CIRCUITS FOR AN OPEN NOTE: Due to limited connector accessibility, before carrying out this test step, visually inspect the INSPECT for binding or broken linkage.
  • Page 9 2006 Town Car Workshop Manual Page 9 of 45 NOTE: For DTC B2267 only. Measure the resistance between HVAC module C228a-11, circuit 1124 (WH), harness side and the RH temperature blend door actuator C2092-1, circuit 1124 (WH), harness side. Is the resistance less than 5 ohms? A9 CHECK HVAC MODULE CONNECTION Carry out the HVAC Module Cold Boot Process.
  • Page 10 2006 Town Car Workshop Manual Page 10 of 45 Is the voltage between 4.7 and 5.1 volts? B3 CHECK CIRCUIT 3058 (LG/RD) FOR AN OPEN Ignition OFF. Disconnect: EATC Module C228b. GO to B4. Measure the resistance between EATC module C228b-19, circuit 3058 (LG/RD) and in- vehicle temperature sensor C233-1, circuit 3058 (LG/RD).
  • Page 11 2006 Town Car Workshop Manual Page 11 of 45 B7 CHECK MODULE CONNECTION Carry out the Electronic Automatic Temperature Control (EATC) Module Cold Boot INSTALL a new EATC module. REFER to Section 412-01. TEST the system for Process. normal operation.
  • Page 12 2006 Town Car Workshop Manual Page 12 of 45 Is the resistance less than 5 ohms? C4 CHECK CIRCUIT 3059 (YE/LG) FOR AN OPEN Measure the resistance between EATC module C228b-16, circuit 3059 (YE/LG) and ambient temperature sensor C132-2, circuit 3059 (YE/LG).
  • Page 13 2006 Town Car Workshop Manual Page 13 of 45 An open in circuit 476 (BN/YE), 468 (BN) or 676 (PK/OG) A short to ground in circuit 468 (BN) or 476 (BN/YE) Solar radiation sensor Electronic automatic temperature control (EATC) module PINPOINT TEST D: DTC B1259 OR DTC B1261 —...
  • Page 14 2006 Town Car Workshop Manual Page 14 of 45 Is the resistance less than 5 ohms? D4 CHECK CIRCUIT 676 (PK/OG) FOR AN OPEN Measure the resistance between solar radiation sensor C287-2, circuit 676 (PK/OG) and ground. GO to D7.
  • Page 15 2006 Town Car Workshop Manual Page 15 of 45 Are the resistances greater than 10,000 ohms? D7 CHECK MODULE CONNECTION Carry out the Electronic Automatic Temperature Control (EATC) Module Cold Boot Process. INSTALL a new EATC module. REFER to Section 412-01.
  • Page 16 2006 Town Car Workshop Manual Page 16 of 45 Does the actuator motor move in the counterclockwise direction? E3 CHECK CIRCUIT 660 (YE/LG) FOR A SHORT TO GROUND Disconnect: Recirc Door Actuator C289. Measure the resistance between ground and EATC module C228a-10, circuit 660 GO to E4.
  • Page 17 2006 Town Car Workshop Manual Page 17 of 45 GO to E8. Measure the resistance between EATC module C228a-10, circuit 660 (YE/LG) and the recirc door actuator C289-1, circuit 660 (YE/LG). REPAIR circuit 660 (YE/LG) for an open. CLEAR the DTCs. REPEAT the self-test.
  • Page 18 2006 Town Car Workshop Manual Page 18 of 45 Is the resistance between 250 and 5,500 ohms? E12 CHECK 436 (RD/LG) CIRCUIT FOR AN OPEN Disconnect: Recirc Door Actuator C289. Measure the resistance between EATC module C228b-8, circuit 436 (RD/LG) and GO to E13.
  • Page 19 2006 Town Car Workshop Manual Page 19 of 45 Measure the resistance between ground and EATC module C228b-3, circuit 435 GO to E17. (YE/LB). REPAIR circuit 435 (YE/LB) for a short to ground. CLEAR the DTCs. REPEAT the self- test. TEST the system for normal operation.
  • Page 20 2006 Town Car Workshop Manual Page 20 of 45 Is the resistance less than 5 ohms? E21 CHECK CIRCUIT 436 (RD/LG) AND CIRCUIT 435 (YE/LB) FOR A SHORT TOGETHER Measure the resistance between EATC module C228b-8, circuit 436 (RD/LG) and EATC module C228b-3, circuit 435 (YE/LB).
  • Page 21 2006 Town Car Workshop Manual Page 21 of 45 F2 CHECK THE FEEDBACK POTENTIOMETER TOTAL RESISTANCE NOTE: Access to the connector in the following step is difficult. Before INSTALL a new actuator (the last one to be disconnected). TEST the system for normal performing this step, visually inspect the actuator and its harness for obvious operation.
  • Page 22 2006 Town Car Workshop Manual Page 22 of 45 Is the resistance between 250 and 5,500 ohms? F5 CHECK CIRCUITS 438 (RD/WH), 1123 (YE/WH) AND 1130 (PK/LG) FOR A SHORT TO VOLTAGE Ignition ON. Measure the voltage between ground and: REPAIR circuit 438 (RD/WH), 1123 (YE/WH) or 1130 (PK/LG) for a short to voltage.
  • Page 23 2006 Town Car Workshop Manual Page 23 of 45 Remove the fused jumpers. Connect a fused jumper wire between: HVAC module C228a-24, circuit 1379 (PK/LB), harness side and HVAC module C228b-11, circuit 1566 (RD/YE), harness side. HVAC module C228a-25, circuit 1380 (TN/YE), harness side and HVAC module C228a-2, circuit 57 (BK), harness side.
  • Page 24 2006 Town Car Workshop Manual Page 24 of 45 Does the resistance smoothly increase and/or decrease when the jumpers are connected? F9 CHECK THE ACTUATOR MOTOR DRIVE CIRCUITS FOR AN OPEN NOTE: Access to the connector in the following step is difficult. Before INSPECT for broken door and linkage.
  • Page 25 2006 Town Car Workshop Manual Page 25 of 45 NOTE: For DTC B1264 only. Measure the resistance between HVAC module C228a-23, circuit 1376 (BK/LB), harness side and floor door actuator C234-6, circuit 1376 (BK/LB), harness side. Are the resistances less than 5 ohms? F10 CHECK THE ACTUATOR CONNECTION Disconnect the actuator connector.
  • Page 26 2006 Town Car Workshop Manual Page 26 of 45 INSTALL a new steering wheel auxiliary control switch. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. Press each steering wheel auxiliary control switch and compare the resistance reading to the chart below.
  • Page 27 2006 Town Car Workshop Manual Page 27 of 45 Pinpoint Test H: No Communication With The Electronic Automatic Temperature Control Module Refer to Wiring Diagrams Cell 55, Automatic Climate Control System for schematic and connector information. Normal Operation Under normal operation, the electronic automatic temperature control (EATC) module is grounded through circuit 57 (BK). The EATC module receives battery voltage through circuit 1566 (RD/YE) and ignition voltage through circuit 1812 (BN/WH).
  • Page 28 2006 Town Car Workshop Manual Page 28 of 45 PINPOINT TEST I: THE EATC SYSTEM IS INOPERATIVE, INTERMITTENT OR INCORRECT OPERATION Test Step Result / Action to Take I1 VERIFY AUTOMATIC OPERATION Ignition ON. With the engine running, press the AUTOMATIC button.
  • Page 29 2006 Town Car Workshop Manual Page 29 of 45 Measure the voltage between ground EATC module C228b-22, circuit 1812 (BN/WH). Are the voltages greater than 10 volts? I13 CHECK THE GROUND CIRCUIT TO THE EATC Ignition OFF. GO to I14.
  • Page 30 2006 Town Car Workshop Manual Page 30 of 45 GO to J4. WARNING: The heater core inlet hose will become too hot to handle and can cause serious burns if the system is working correctly. GO to Section 303-03 to check the cooling system function.
  • Page 31 2006 Town Car Workshop Manual Page 31 of 45 K1 CHECK THE A/C PRESSURE PCM PID Ignition ON. GO to K2. Enter the following diagnostic mode on the scan tool: A/C Pressure PCM PID. With the manifold gauge set connected, compare the pressure readings of the manifold gauge set and the A/C pressure PID.
  • Page 32 2006 Town Car Workshop Manual Page 32 of 45 Is the voltage greater than 10 volts? K9 CHECK THE GROUND AT THE A/C COMPRESSOR CLUTCH FIELD COIL Measure the voltage between A/C compressor clutch field coil C100-2, circuit 57 (BK) and A/C compressor clutch field coil C100-1, circuit 321 (GY/WH).
  • Page 33 2006 Town Car Workshop Manual Page 33 of 45 Does the test lamp illuminate? K13 CHECK CIRCUIT 1810 (LG/OG) FOR AN OPEN Ignition ON. Measure the voltage between A/C clutch relay socket pin 5, circuit 1810 (LG/OG) and ground. GO to K14.
  • Page 34 2006 Town Car Workshop Manual Page 34 of 45 Is the resistance less than 5 ohms? K16 CHECK THE HVAC MODULE CONNECTION Inspect the module connectors for: INSTALL a new HVAC module. REFER to corrosion. Section 412-01. TEST the system for normal pushed-out terminals.
  • Page 35 2006 Town Car Workshop Manual Page 35 of 45 Test Step Result / Action to Take L1 CHECK THE A/C PRESSURE PCM PID Ignition ON. GO to L2. Enter the following diagnostic mode on the scan tool: A/C Pressure PCM PID.
  • Page 36 2006 Town Car Workshop Manual Page 36 of 45 is delivered to the blower motor through circuit 371 (PK/WH). Ground for the motor is provided through circuit 515 (OG/RD) from the blower control module. Ground for the blower control module is provided by circuit 57 (BK).
  • Page 37 2006 Town Car Workshop Manual Page 37 of 45 Disconnect: Blower Motor C1031. INSTALL a new blower motor. TEST the system for normal Measure the resistance between blower motor C1031-2, circuit 515 (OG/RD) and blower motor speed operation. control C1308-4, circuit 515 (OG/RD).
  • Page 38 2006 Town Car Workshop Manual Page 38 of 45 Is the voltage greater than 10 volts? M10 CHECK THE EATC MODULE OUTPUT Ignition ON. Measure the voltage between blower motor relay socket pin 86, circuit 181 (BN/OG) and socket pin 85, INSTALL a new blower motor relay.
  • Page 39 2006 Town Car Workshop Manual Page 39 of 45 module through circuit 364 (BK/LG) if any position but OFF is selected. Voltage is supplied to the relay switch contact through circuit 181 (BN/OG). When the relay coil is energized, voltage is delivered to the blower motor through circuit 371 (PK/WH).
  • Page 40 2006 Town Car Workshop Manual Page 40 of 45 Is voltage present? N5 CHECK THE BLOWER MOTOR SPEED CONTROL CIRCUITS FOR A SHORT TO GROUND Ignition OFF. Measure the resistance between blower motor speed control: GO to N6. C1308-1, circuit 260 (RD/OG) and ground.
  • Page 41 2006 Town Car Workshop Manual Page 41 of 45 Is the voltage greater than 1 volt? N9 CHECK MODULE CONNECTION Carry out the Electronic Automatic Temperature Control (EATC) Module Cold Boot Process. INSTALL a new EATC module. REFER to Section 412-01.
  • Page 42 2006 Town Car Workshop Manual Page 42 of 45 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.
  • Page 43 2006 Town Car Workshop Manual Page 43 of 45 Ambient Temperature Resistance 10-20°C (50-68° F) 37,000-58,000 ohms 20-30°C (68-86° F) 24,000-37,000 ohms 30-40° C (86-104° F) 16,000-24,000 ohms Blend Door Actuator Actuator Pins Approx. Resistance 4 and 5 4,125-6,875 ohms...
  • Page 44 2006 Town Car Workshop Manual Page 44 of 45 Use the Radiator/Heater Core Pressure Tester to carry out the pressure test. 1. NOTE: Due to space limitations, a bench test may be necessary for pressure testing. Drain the coolant from the cooling system.
  • Page 45 2006 Town Car Workshop Manual Page 45 of 45 If a very small leak is suspected, wait 30 minutes and observe the vacuum gauge. If a small amount of vacuum is lost, operate the vacuum pump with gauge valves open for an additional 30 minutes to remove any remaining refrigerant from the oil in the A/C evaporator core or A/C condenser core.

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