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12. REMOVE A/C CONTROL ASSEMBLY Remove the 2 screws and pull out the A/C control assembly, then disconnect the connector. NOTE: Be careful not to vent the mode control cable, when pull out the A/C control assembly. INSTALLATION 1. INSTALL A/C CONTROL ASSEMBLY a. Connect the connector. b. Pass the heater control cables as shown in the illustration. COMPONENTS REMOVAL 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. REMOVE COWL SIDE TRIMS REMOVE FRONT DOOR SCUFF PLATES REMOVE LOWER FINISH PANEL REMOVE LOWER INSERT PANEL REMOVE CENTER CLUSTER FINISH PANEL REMOVE HEATER TO RESISTOR NO.2 DUCT REMOVE LOWER PANEL REMOVE REAR CONSOLE BOX REMOVE SHIFTING HOLE BEZEL REMOVE FINISH LOWER CENTER PANEL 11. DISCONNECT HEATER CONTROL CABLE c. Install the 2 set screws. 2. CONNECT HEATER CONTROL CABLES a. Set Air inlet control lever at “RECIRC” position b. Set Temperature control dial at “MAX. COOL” position c. Set Mode control dial at “DEF” position Zoom d. Adjust air inlet control cable. Set air inlet damper control lever to “RECIRC” position and connect the inner cable to lever pin and clamp the outer cable. HINT: Lock the clamp while lightly pushing the outer cable to the direction shown by arrow in the illustration. Sized for Print Zoom e. Adjust air mix control cable. Set air mix damper control lever to “MAX. COOL” position and connect the inner cable to lever pin and clamp the outer cable. HINT: Lock the clamp while lightly pulling the outer cable to the direction shown by arrow in the illustration. Sized for Print

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1. Remove the heater air plenum chamber (18471) assembly as outlined. 2. Remove the four retaining screws from the heater core cover (18B300) and remove the heater core cover from the heater air plenum chamber assembly. Heater Core Removal 3. Pull the heater core (18476) assembly from the heater air plenum chamber assembly. Installation 1. Carefully install heater core assembly into the heater air plenum chamber assembly. Visually check to ensure that heater core case seal (18658) is properly positioned. 2. Position the heater core cover and install the four retaining screws. 3. Install the heater air plenum chamber assembly as outlined. Heater Air Plenum Chamber Removal 1. Disconnect battery ground cable (14301). Refer to Section 14-01. 2. Disconnect the heater water hoses (18472) from the heater core tubes. Plug the ends of the heater water hoses to prevent coolant loss. 3. Plug heater core tubes securely to prevent coolant leakage from heater core (18476) during heater air plenum chamber removal. 4. Remove three nuts located below the windshield wiper motor (17508) retaining the LH end of the heater air plenum chamber (18471) to the dash panel (01610). 5. Remove one nut retaining the upper LH corner of the A/C evaporator core housing (19A559) to the dash panel. 6. Remove LH and RH lower instrument panel insulators. 7. Disconnect two vacuum supply hoses from vacuum source. Push grommet and vacuum supply hose into passenger compartment. 8. Remove all instrument panel retaining screws and pull the instrument panel (04320) back as far as possible without disconnecting any wire harnesses. 9. Loosen the RH door sill plate and remove the RH side cowl trim panel. 10. Remove cross body brace and disconnect wiring harness from A/C electronic door actuator motor (19E616) and disconnect the sensor tube from the evaporator case connector. 11. Disconnect the vacuum jumper harness at the multiple vacuum connector near the heater outlet floor duct (18C433). 12. Disconnect the white vacuum hose from the heater and A/C air inlet duct door vacuum

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Refer to Engine Controls Schematics MAF, Secondary Air Injection Pump Bypass Solenoid, IAC and Secondary AIR Pump . Circuit Description The AIR pump is used on this vehicle to lower tail pipe emissions on start-up. The powertrain control module (PCM) grounds the AIR pump relay control circuit, which energizes the AIR pump. The PCM also grounds the AIR solenoid valve control circuit, which energizes the AIR solenoid valve. The AIR solenoid valve opens allowing manifold vacuum to open the AIR control valves. The PCM enables both control circuits when AIR system operation is desired. When the AIR system is active, the AIR pump forces fresh air into the exhaust stream in order to accelerate catalyst operation. The AIR control valves replace the conventional check valves. When the AIR system is inactive, the AIR control valves prevent air flow in either direction. DTC P0412 applies to the AIR solenoid control circuit. DTC P0418 applies to the AIR pump relay control circuit. DTC P0410 sets if an air flow problem is detected. The PCM will run two tests using the heated oxygen sensor (HO2S) voltage to diagnose the AIR system. Both tests have two parts. The passive test is performed during regular AIR pump operation. The passive test consists of the following: Passive Test Part 1 When the AIR system is enabled, the PCM monitors the HO2S voltage. If the HO2S voltage goes below a threshold, the PCM interprets this as an indication that the AIR system is operational. Passive Test Part 2 When the AIR system is disabled, the PCM monitors the HO2S voltage. The HO2S voltage should increase above a threshold and switch normally. If both of these tests indicate a pass, no further action is taken. If one of the above tests failed or is inconclusive, the diagnostic will proceed to test two. The active test is performed specifically for diagnostic purposes. Test two consists of the following: Active Test Part 1 During this test the PCM turns the AIR system on during closed loop operation. When the AIR system is activated, the PCM monitors the HO2S voltage. If the AIR system is operating properly, the HO2S voltage should go below a predetermined threshold. Active Test Part 2 The PCM turns the AIR system off. The HO2S voltage should return to above a rich threshold.

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An optional auxiliary air conditioning and heating system is available. The system is a one-piece unit that is located on the LH side of the vehicle between the side windows and the floorpan, behind the rear wheel well. The driver has primary control of the auxiliary air conditioning and heating system or can transfer control to a rear passenger control panel. All of the auxiliary A/C-heater system components are serviceable from the inside of the vehicle except the lines. Component Locations The auxiliary A/C and heating system has the following features: The auxiliary A/C and heating system is functioning whenever the instrument panel mounted A/C control is in any position except OFF. The auxiliary blower motor recirculates the air inside the vehicle. Outside air is not available to the auxiliary system. Air is cooled and dehumidified by the auxiliary A/C evaporator core only if the instrument panel mounted A/C control is adjusted to a position that requires A/C compressor operation. The temperature blend door and the A/C damper door are controlled by electric actuator motors. Movement of the auxiliary temperature control between COOL and WARM causes a corresponding movement of the temperature blend door to mix air flowing through and around the auxiliary heater core. Movement of the auxiliary mode control between PANEL and FLOOR causes a corresponding movement of the A/C damper door to direct air flow between the panel (headliner) registers and the floor duct. Blower Motor The auxiliary air conditioning system contains a blower motor which is controlled by the heater blower motor switch on the front or rear auxiliary A/C control. Control Assembly The auxiliary A/C system has dual controls for the driver and rear passengers consisting of temperature, blower speed, and mode. The front auxiliary A/C control is mounted in the overhead console or the front floor console. The rear auxiliary A/C control is mounted in a separate overhead console positioned on the roof trim panel or the rear of the front floor console. Front Auxiliary A/C Control

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Heater blower speed resistor Inertia fuel shut off switch Inertia fuel shut off switch – Diesel Interior lamp delay relay Outside air temperature sensor Seat adjustment relay, driver’s side Seat adjustment relay, passenger’s side Steering position sensor Sunroof motor Suspension adjustment valve block, rear Suspension control module Suspension G-force sensor Suspension ride height sensor, front Suspension ride height sensor, rear Vehicle speed sensor Air conditioning air temperature control module (-1994MY) Air conditioning condenser blower motor control module Air conditioning control module Air conditioning control module (1995MY-) Air conditioning refrigerant pressure switch Airbag control module (in steering wheel) Alarm system control module Central locking control module Central locking signal control module Coded keypad Compact disc interface Cruise control actuator valve Cruise control module Cruise control vacuum pump Diagnostic link Door mirror adjustment control module Electric windows control module, right front Engine control module relay 1 Engine control module relay 2 Engine coolant blower motor relay 1