Resistance Check
- Remove ECM from its bracket by referring to ENGINE CONTROL MODULE (ECM) REMOVAL AND INSTALLATION
.CAUTION: Never touch terminals of ECM itself or connect voltmeter or ohmmeter (2).
- Connect special tool (A) to ECM connectors (1) securely.NOTE: Do not connect the other connector of special tool to ECM.
- Check resistance between each pair of terminals of special tool connectors as listed in the TERMINALS CIRCUIT TABLE .CAUTION:
- Be sure to connect ohmmeter probe from wire harness side of coupler.
- Be sure to turn OFF ignition switch for this check.
- Resistance in the TERMINALS CIRCUIT TABLE represents that measured when parts temperature is 20°C (68°F).
TERMINALS CIRCUIT TABLE
| Terminals | Circuit | Standard resistance | Condition |
|---|---|---|---|
| E23-16 to E23-8 | Main relay | 160 - 240 Ω | Battery disconnected and ignition switch turned ON |
| E23-24 to E23-8 | Fuel pump relay | 160 - 240 Ω | - |
| E23-6 to E23-8 | Throttle actuator control relay | 160 - 240 Ω | - |
| C37-15 to E23-2/3 | Fuel injector No. 1 | 10 - 14 Ω | - |
| C37-34 to E23-2/3 | Fuel injector No. 2 | 10 - 14 Ω | - |
| C37-14 to E23-2/3 | Fuel injector No. 3 | 10 - 14 Ω | - |
| C37-33 to E23-2/3 | Fuel injector No. 4 | 10 - 14 Ω | - |
| C37-13 to E23-2/3 | Fuel injector No. 5 | 10 - 14 Ω | - |
| C37-32 to E23-2/3 | Fuel injector No. 6 | 10 - 14 Ω | - |
| C37-12 to E23-2/3 | EGR valve (stepping motor No. 1 coil) | 20 - 24 Ω | - |
| C37-31 to E23-2/3 | EGR valve (stepping motor No. 2 coil) | 20 - 24 Ω | - |
| C37-11 to E23-2/3 | EGR valve (stepping motor No. 3 coil) | 20 - 24 Ω | - |
| C37-30 to E23-2/3 | EGR valve (stepping motor No. 4 coil) | 20 - 24 Ω | - |
| C37-10 to E23-2/3 | EVAP canister purge valve | 25 - 30 Ω | - |
| C37-29 to E23-2/3 | IMT vacuum solenoid valve | 33 - 45 Ω | - |