EC-at Switch & Indicator

Checking operation

1. Turn ignition switch to On position.
2. Check that mode indicator illuminates at each position.
3. Check that O/D OFF indicator illuminates while button is out.
4. If switch is not operating correctly, check EC-AT switch or indicator.

Fig. 12 EC-AT switch connector terminal identification. 1987 626:

Checking Continuity

1. Disconnect battery ground cable.
2. Remove center console.
3. Disconnect EC-At switch connector.
4. Check continuity of terminals, Fig. 12. In economy mode, there should be continuity between terminals b and d. In power mode, there should be continuity between terminals c and d. With O/D button out, there should be continuity between terminals e and f.
5. If continuity is not as described, replace switch.

Fig. 13 Mode indicator connector terminal identification. 1987 626:

Checking Mode Indicator

1. Disconnect battery ground cable.
2. Remove mode indicator.
3. Disconnect mode indicator connector.
4. There should be continuity between terminals a and b and between terminals a and c, Fig. 13.
5. If continuity is not as described, replace switch.

Fig. 14 Combination meter a(5) & c(9) terminals location. 1987 626:

Checking O/D OFF Indicator

1. Remove combination meter.
2. Connect 12 volts to a 5 terminal and ground to c 9 terminal, Fig. 14.
3. Check that O/D OFF indicator illuminates. If not, replace bulb.