4 Runner 4WD V6-180.5 2959cc 3.0L SOHC (3VZ-E) (1989)
Component Test
***UPDATED BY TSB# EN91-007, JUNE 1991
ECU Terminal Pin-Outs
1.
Using a voltmeter, back probe ECU terminals IGT and E1.
NOTE:To prevent flooding during testing, don't crank engine for more than 1 or 2 seconds at a time.
2.
Crank or start engine.
Standard Voltage:
0.7 - 1.0V
3.
If no voltage reading was obtained in step #2, recheck voltage, substituting body ground for terminal E1.
4.
If voltage was present in step #3, inspect wiring and connection between ECU terminal E1 and body ground. If wiring and connection were not at
fault, replace ECU.
5.
If voltage was not present in step #3, inspect fusible link, ignition switch, wiring and connectors between battery, ignition coil (+), and igniter
assembly.
6.
If no faults were found in steps #1 through #5, proceed with this test. If faults were found and corrected, verify problem still exists prior to
proceeding with this test.
Primary Coil Test