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Home >> Toyota >> 1993 >> Pickup Base, R150 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 4-CYL >> Diagnostic Code Charts >> Diagnostic Circuit Check
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Diagnostic Circuit Check

CAUTION: Perform all voltage measurements with ECU harness connector installed. Use a high-impedance DVOM (10,000-ohm minimum). Verify battery voltage is greater than 11 volts.
Fig 1: Diagnostic Circuit Check Schematic
G91E18048Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Diagnostic Circuit Check Flow Chart
G91G18081Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002