Starion L4-2555cc 2.6L SOHC Turbo VIN N FI (1985)
Throttle Position Sensor: Technical Service Bulletins
ECI - ECI W/Intercooler Test Procedures
SUBJECT:
1985.5 STARION ECI TEST PROCEDURES
NO.
STB-85-14-003
DATE May, 1985
MODEL 1985.5 Starion w/Intercooler
PURPOSE ECI test values for the 1985.5 Starion with intercooler are different from those published in the 1985 Starion Service Manual. The tables on
pages 14-30 and 14-31 do not apply to models with intercooler, and the terminal connectors on the ECU are also different. Therefore, when performing
an ECI voltage check on a 1985.5 Starion with intercooler, use the information in this bulletin instead of the information in the Service Manual.
TWO TEST PROCEDURES This bulletin contains two test procedures. The first allows you to check the ECI system voltages at the ECU with your
digital voltmeter. The second tells how to perform the tests with the ECI Checker.
FIGURE 1
1.
VOLTMETER TEST PROCEDURE The voltmeter test procedure is particularly useful when you want to check the ECI system without
unplugging the computer (and consequently erasing the ECI memory).
Voltages are measured right at the computer on the right cowl kick panel. Attach thin wire probes to your digital voltmeter. Insert the probes into the tops
of the connectors on the computer as shown in Fig. 1.
You don't have to unplug the connectors, but you may find it convenient to remove the computer from the kick panel to make it easier to reach the
connector terminals.
CAUTION: Short-circuiting the positive (+) probe between a connector terminal and ground could damage the vehicle wiring, the sensor, the ECU, or
all three. Use care to prevent this! Insulate the exposed part of the probe with insulating material as a precaution.
VOLTMETER TEST PROCEDURE
1.
Remove the trim panel below the glovebox and the right side kick panel to reach the computer terminal connectors.
2.
Attach the black lead of your voltmeter to a good groundone of the computer mounting screw holes would be satisfactory. (Use a jumper to ground
the computer box if you have removed it from the kick panel for this test.)
3.
Refer to "1985.5 Starion Intercooler ECI System Check Procedure Chart I" on page 3. Note the connector terminal callouts in the second column.
Insert the positive probe into each connector terminal in turn. Switch the ignition from "LOCK" to "ON," and compare the voltage with that shown
in the chart. For example, when the probe is on terminal B1 the voltmeter should read system voltage.
4.
Proceed until you have checked all the terminals in Chart I, or until a voltage is found that is out of specification. If you obtain a voltage reading
out of specification, go to Step 5. If all voltages are within specification, go to Step 6.
5.
When you find a voltage that is out of specification (except TPS), measure sensor voltage output at the sensor terminal of the same color wire as in
the computer terminal for that sensor. This tells you whether the voltage variation is in the sensor or in connectors and wiring.