ECM Voltage Charts

Voltage At ECU Wiring Connectors

Terminals
Condition(s) STD Voltage

+B - E1
Igntion Switch ON 10 - 14

BATT - E1
N/A 10 - 14

IDL - E2
Ignition Switch ON
Throttle Valve Open 4 - 10

VTA - E2
Ignition Switch ON
Throttle Valve Fully Closed 0.1 - 1.0
Throttle Valve Fully Open 4 - 5

Vcc - E2
Ignition Switch ON
N/A 4 - 6

IGt - E1
Idling 0.7 - 1.0

STA - E1
Ignition Switch ST Position 6 - 12

No. 10 - E01
No. 20 - E02
Ignition Switch ON 9 - 14

W - E1
No Trouble (CHECK ENGINE light OFF)
Engine Running 8 - 14

Vc - E2
Ignition Switch ON 4 - 9

Vs - E2
Ignition Switch ON
Measuring Plate Fully Closed 0.5 - 2.5
Measuring Plate Fully Open 5 - 10
Idling 2 - 8

THA - E2
Ignition Switch ON
Intake Air Temperature 20°C (68°F) 2 - 6

THW - E2
Ignition Switch ON
Coolant Temperature 80°C (176°F) 0.25 - 2.5

B/K - E1 [1]
Stop Light Switch ON 8 - 14

[1] 22R-E only