Thermo Time Switch: Testing and Inspection

1. Unplug connector from Cold Start Injector Time Switch.
2. Connect a voltmeter to terminal STA on the harness and ground, while an assistant turns the ignition switch to the start position (crank mode).
3. Measure the voltage while the starter is operating.

Voltage: 9.5 - 12.5 volts

4. If no voltage is present, check ignition switch and harness wiring for an open circuit.
5. Using an Ohmmeter, measure the resistance of the Cold Start Injector Time Switch.

Checking Cold Start Injector Time Switch Resistance:

TERMINALS: RESISTANCE:

STA - STJ 25 - 45 Ohms below 59°F (15°C)
STA - STJ 65 - 85 Ohms above 86°F (30°C)
STA - GROUND 25 - 85 Ohms

6. If not as specified, replace the Cold Start Injector Time Switch.
7. Remove Ohmmeter and reconnect the Time Switch connector.

***UPDATED BY TSB# ENG010, SEPTEMBER 1, 1989

A new Cold Start Injector Time Switch is now available for improved startability. Refer to ALLDATA TSB for more information and replacement part numbers.