A/C Controller - Replacement Procedure & Precaution
85mitsubishi04SUBJECT: STARION A/C CONTROLLER HARNESS
NO. STB-85-24-007
DATE September, 1985
MODEL 1985 Starion
PURPOSE This bulletin explains the procedure to follow where the controller in the 1985 Starion A/C system is damaged by a surge of high voltage. When it is determined that the controller is damaged and must be replaced, a new harness kit containing a Zener diode and resistor must be installed at the same time to protect the system against future damage from the same type of voltage surge. (The harness containing the Zener circuitry has been incorporated into production effective with the introduction of the 1986 models).
FIGURE 1:
The procedure for installing the harness follows.
INSTALLATION PROCEDURE
1. Obtain a new controller MB276497 and a new Power Transistor Harness Kit MB 438925. The latter is shown in Fig. 1.
2. Disconnect the battery negative terminal.
FIGURE 2:
3. Remove the glovebox under cover (Fig. 2) and disconnect the connector for the lower in-car sensor attached to the under cover.
FIGURE 3:
FIGURE 4:
4. Remove the ECI Computer cover and the glove box (Figs. 3 and 4).
5. Remove the Phillips screw on the right side of the ATC control unit.
6. Using a trim tool or slim screwdriver, snap the A/C control panel bezel out of the instrument panel.
7. Remove the screws securing the control panel and controller to the instrument panel. Disconnect the electrical connectors and pull out the control panel and controller.
FIGURE 5:
8. Remove the right side console cover (Fig. 5).
FIGURE 6:
9. Disconnect the glove box switch connector, and remove the glove box lower frame (Fig. 6).
FIGURE 7:
10. Refer to Fig. 7. Disconnect the power transistor harness connectors (1) and (2), vacuum hose (3), and ground wire (4).
FIGURE 2:
11. Remove two evaporator mounting bolts (12 mm hex) inside the passenger compartment (Fig. 2, P.4), and loosen the evaporator mounting nut in the engine compartment. Move the evaporator rearward and slightly to the left to facilitate removal of the blower housing.
FIGURE 9:
12. Remove two blower assembly mounting bolts and one nut (12 mm hex, see Fig. 9, P.4 for location). Remove the duct joint screw, loosen the duct joint, and then remove the blower assembly.
FIGURE 8:
13. Remove the two screws securing the power transistor harness to the blower (Fig. 8) and remove and discard the harness.
FIGURE 9:
14. Install and connect the new harness MB438925. Refer to Figure 9, Page 4 for installation tips.
15. Disassemble the damaged controller from the control panel. Then assemble the new controller MB276497 to the control panel.
16. Reassemble and connect all parts in reverse order of removal and reconnect the battery.
WARRANTY CONSIDERATION
Labor Operation Code: 24 50 10 91 Time Allowance 1.0 hr.