Toyota Celica Supra 1986 Service And Repair Manual page 133

EFI SYSTEM - Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter Fl-31
n
Terminals
IOL -
e,
VTA -
e,
Vc - E:r
Vs -
E:r
THA-
e,
G-G9
No -
G6
ISC•. ISC2
+8
ISC:J, ISCc
-
ECU ConneetOt
INSPECTION OF WIRING CONNECTOR LINE
MEASURE RESISTANCE OF ECU
CAUTION:
1- Do not touch tne ECU terminals.
2. The tester probe should be Inserted Into the wiring
connect01 from the wiring side.
Using an ohmmeter. check the resistance between each
terminal of the wiring connector.
• Remove the glove box.
• Disconnect t he wiring connectors from the ECU.
• Measure the resistance between each terminal of the wir-
ing connectors.
Resistances at ECU Wiring Connectors
Condition
Reaistanc-e (0)
Throttle valve open
. .
Throttle valve fully clos.ed
0 - 100 0
Throttle valve fully opened
3.300 - 10.000
Throttle va.lve fvlly closed
200 - 800
Disconnect air flow meter connector
3.000 - 7.000
Discon nect throttle position sensor connector
200 - 400
Measuring plat e fully c:losed 20 - 400
Measuring p late fully opened 20 - 1.000
Intake air temperature 20°C (68°FJ
2.000 - 3,000
-
140 - 180
-
140 - 180
-
10 - 30