Details of economy mode indication system
General description
1. Some manual transmission models are equipped with economy mode indicator. Two lights on the dashboard notify the driver to change the intensity of the accelerator pedal or shift into a higher gear.
2. Bulbs do not light up on the 5th (higher) transmission and braking. (In models from 1984 and later, the throttle indicator works in all mechanisms.)
3. Besides the lights themselves, the main parts of the system are the control unit located under the dashboard or behind the instrument cluster; a vacuum switch connected to the intake manifold through a delay valve; 5th gear engagement mechanism and idle switch on the carburetor.
4. Control unit and cold switch. travel is separated by a coasting economy system (Chapter 4).
5. The control unit receives signals from the already mentioned switches, plus an input signal from the ignition coil. The signal from the ignition coil allows the unit to control the engine speed.
Switch Connector (arrowed) economy drive 5th gear
Examination
Offset indicator
6. Start the engine and let it idle.
7. Gradually increase the engine speed and check the indicator lights at approximately 2800 rpm.
8. Disconnect the 5th gear switch (closer to the battery) and recheck. The indicator should not light up accidentally. Reconnect the 5th gear switch connector.
Over Throttle Indicator
9. For this test, you will need a vacuum pump and gauge.
10. Disconnect the vacuum hose from the switch and connect the vacuum pump and gauge instead. Turn on the ignition. Have an assistant watch the indicator until vacuum is applied to the switch. The indicator should light up when the vacuum is between 0-120mmHg. and higher at higher values.
Agile Vacuum Circuit Breaker Saving Drive
11. On pre-1984 models, disconnect the 5th gear shifter and recheck. The indicator should not glow randomly. Reconnect the 5th gear switch connector and vacuum hose with switch.
5th gear switch (marked with arrows) and wiring
Replacement Parts
Control lights
12. Do as described in Section 12, Chapter 10.
Vacuum circuit breaker
13. Disconnect a vacuum hose and an electroconducting socket from the switch. Disconnect the switch from the bulkhead.
14. Install a new switch and attach the hose and wiring.
Cold switch move
15. Replacing the cold switch. the course is described in Chapter 4.
5th gear switch
16. Disconnect the 5th gear switch connector and follow the wiring back to the transmission.
17. Unscrew the switch from the transmission.
18. Install and connect a new switch, then check the transmission oil level (Section 1, Chapter 4).
Control block
19. No specific information about the location of the control unit was available at the time of writing this manual. It can be accessed by removing the lower trim of the dashboard, dashboard or instrument cluster.