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Code Charts: Notes

NOTE: To identify ECM connector terminals, see ECM TERMINAL IDENTIFICATION chart. To test ECM power supply, go to TEST NO. 1 chart.
Fig 1: ECM Terminal Identification Courtesy Isuzu Motor Co.
G93B78783
ECM 26-PIN TERMINAL IDENTIFICATION (1)

Pin No. Wire Color Main Connection
1 Light/Green Red Power
2 Black/Green Injector Ground
3 Black/Yellow DLC (ALDL)
4 Blue/Yellow Idle Input (WOT Switch)
5 Green/Black AC Input
6 0 Not Used
7 Green/Blue CKP Sensor Signal
8 Light Green/Yellow Pressure Regulator Control
9 Brown/Yellow Air Management VSV
10 Light Green EGR Duty Solenoid
11 Not Used Not Used
12 White/Black Injector No. 2
13 Violet/White Injector No. 1
14 Light Green/Black Power
15 0 Not Used
16 0 Not Used
17 0 Trans Input
18 0 Not Used
19 0 Not Used
20 White CKP Sensor Reference
21 White/Green EGR VSV
22 Green MIL
23 Green/White EVAP VSV
24 White/Blue Injector No. 4
25 White/Red Injector No. 3
26 Black/Green Injector Ground
(1) Wire colors may vary. Check wiring diagrams for proper application.
ECM 22-PIN TERMINAL IDENTIFICATION (1)

Pin No. Wire Color Main Connection
1 Blue Power Signal
2 Black/Red Ground (Power, Ignition)
3 Green/Orange MAP Sensor Reference
4 Red/White Power (Backup)
5 White/Green Vehicle Speed Sensor
6 Shield Oxygen Sensor
7 Black/White ECT Sensor Ground
8 Brown/White ECT Sensor Input
9 Blue/White MAP Sensor Input
10 0 Not Used
11 Black Ground (Power)
12 0 Not Used
13 Black/Red Ground (Power, Ignition)
14 Red Airflow Sensor (Power)
15 Green/Red WOT Input (WOT Switch)
16 Yellow/Black Starter Switch
17 Shield Airflow Sensor
18 Blue/Red MAP Sensor Ground
19 Violet Airflow Sensor Ground
20 Red Oxygen Sensor Input
21 White Airflow Sensor Input
22 Black Ground (Power)
(1) Wire colors may vary. Check wiring diagrams for proper application.
CAUTION: Perform all voltage measurements with ECM harness connector installed. Use a high-impedance voltmeter (10,000 ohm minimum). Verify battery voltage is greater than 11 volts.