Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSISUZU2006ASCENDER S, 4.2 S, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSWIRING DIAGRAMSOEM CONNECTOR END VIEWS (2 OF 5)ENGINE CONTROL MODULE (ECM) CONNECTOR END VIEWS (5.3L)ENGINE CONTROL MODULE (ECM) CONNECTOR END VIEW
2006 Isuzu Ascender S, 4.2 S, 4WD
Engine Control Module (ECM) Connector End View
2006 Isuzu Ascender S, 4.2 S, 4WDSECTION Engine Control Module (ECM) Connector End View
Engine Control Module (ECM) C1
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | TN/WH | 2500 | High Speed GMLAN Serial Data Bus (+) |
| 2 | TN | 2501 | High Speed GMLAN Serial Data Bus (-) |
| 3-6 | - | - | Not Used |
| 7 | BN | 1271 | Low Reference |
| 8 | PU | 1272 | Low Reference |
| 9 | - | - | Not Used |
| 10 | YE | 5991 | Powertrain Relay Coil Control |
| 11-12 | - | - | Not Used |
| 13 | YE/BK | 625 | Starter Enable Relay Control |
| 14 | PK | 839 | Ignition 1 Voltage |
| 15 | - | - | Not Used |
| 16 | D-GN | 1049 | Class 2 Serial Data |
| 17 | GY | 397 | Cruise Control On Switch Signal (K34) |
| 18 | PK | 1020 | Ignition 0 Voltage |
| 19 | PK | 439 | Ignition 1 Voltage |
| 20 | OG | 240 | Battery Positive Voltage |
| 21 | D-GN/WH | 817 | Vehicle Speed Signal |
| 22 | D-BU | 1161 | APP Sensor 1 Signal |
| 23 | D-BU | 2364 | Cooling Fan Speed Signal |
| 24 | D-GN | 890 | Fuel Tank Pressure Sensor Signal |
| 25 | - | - | Not Used |
| 26 | RD/BK | 380 | A/C Refrigerant Pressure Sensor Signal |
| 27 | D-BU | 84 | Cruise Control Set/Coast Switch Signal (K34) |
| 28 | - | - | Not Used |
| 29 | TN | 1274 | 5-Volt Reference |
| 30 | GY | 2700 | 5-Volt Reference |
| 31 | GY | 2709 | 5-Volt Reference |
| 32 | L-BU | 1320 | CHMSL Supply Voltage (K34) |
| 33 | GY/BK | 87 | Cruise Control Resume/Accel Switch Signal (K34) |
| 34 | - | - | Not Used |
| 35 | WH/BK | 1164 | 5-Volt Reference |
| 36 | WH/BK | 2366 | Cooling Fan Clutch Control |
| 37 | PU | 1589 | Fuel Level Sensor Signal |
| 38-40 | - | - | Not Used |
| 41 | L-BU | 1162 | APP Sensor 2 Signal |
| 42-44 | - | - | Not Used |
| 45 | D-GN/WH | 465 | Fuel Pump Relay Control |
| 46 | PU | 420 | TCC Brake Switch/Cruise Control Release Signal |
| 47 | - | - | Not Used |
| 48 | WH | 121 | Engine Speed Signal |
| 49-50 | - | - | Not Used |
| 51 | OG/BK | 1786 | Ignition Lock Cylinder Control Actuator Signal |
| 52 | PU | 806 | Crank Voltage |
| 53 | - | - | Not Used |
| 54 | WH | 1310 | EVAP Canister Vent Solenoid Control |
| 55 | BK | 2751 | Low Reference |
| 56 | - | - | Not Used |
Engine Control Module (ECM) C2
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | L-GN | 3212 | HO2S Heater Low Control - Bank 2 Sensor 1 |
| 2 | BK/WH | 3113 | HO2S Heater Low Control - Bank 1 Sensor 1 |
| 3 | - | - | Not Used |
| 4 | D-BU/WH | 878 | Fuel Injector 8 Control |
| 5 | BK | 1744 | Fuel Injector 1 Control |
| 6 | L-GN/BK | 1745 | Fuel Injector 2 Control |
| 7 | RD/BK | 877 | Fuel Injector 7 Control |
| 8 | L-BU/BK | 844 | Fuel Injector 4 Control |
| 9 | PK/BK | 1746 | Fuel Injector 3 Control |
| 10 | BK/WH | 845 | Fuel Injector 5 Control |
| 11-12 | - | - | Not Used |
| 13 | YE/BK | 846 | Fuel Injector 6 Control |
| 14 | YE/BK | 1868 | Low Reference |
| 15 | PK/BK | 632 | Low Reference |
| 16 | BN | 2129 | Low Reference |
| 17 | OG | 5494 | Cylinder Shutoff Solenoid Control 4 (DOD) |
| 18 | GY | 5493 | Cylinder Shutoff Solenoid Control 3 (DOD) |
| 19 | - | - | Not Used |
| 20 | OG/BK | 469 | Low Reference |
| 21 | BK | 2755 | Low Reference |
| 22-23 | - | - | Not Used |
| 24 | TN WH |
332 | Oil Pressure Sensor Signal |
| 25 | - | - | Not Used |
| 26 | BN/WH | 633 | CMP Sensor Signal |
| 27-28 | - | - | Not Used |
| 29 | PU | 486 | TP Sensor 2 Signal |
| 30 | - | - | Not Used |
| 31 | D-GN | 485 | TP Sensor 1 Signal |
| 32 | - | - | Not Used |
| 33 | D-BU | 5491 | Cylinder Shutoff Solenoid Control 1 (DOD) |
| 34 | L-GN | 5492 | Cylinder Shutoff Solenoid Control 2 (DOD) |
| 35 | GY | 2704 | 5-Volt Reference |
| 36 | BK/WH | 1704 | Low Reference |
| 37 | GY | 2705 | 5-Volt Reference |
| 38-40 | - | - | Not Used |
| 41 | L-BU/BK | 1688 | 5-Volt Reference |
| 42 | - | - | Not Used |
| 43 | L-GN | 1867 | 12-Volt Reference |
| 44 | RD | 631 | 12-Volt Reference |
| 45 | GY | 23 | Generator Field Duty Cycle Signal |
| 46 | L-GN | 432 | MAP Sensor Signal |
| 47 | - | - | Not Used |
| 48 | PU/WH | 1665 | HO2S High Signal - Bank 1 Sensor 1 |
| 49 | TN | 1664 | HO2S Low Signal - Bank 1 Sensor 1 |
| 50 | D-GN/WH | 428 | EVAP Canister Purge Solenoid Control |
| 51 | PU | 1666 | HO2S High Signal - Bank 2 Sensor 1 |
| 52 | BK | 2761 | Low Reference |
| 53 | RD | 2127 | IC 7 Control |
| 54 | PU | 2121 | IC 1 Control |
| 55 | YE | 410 | ECT Sensor Signal |
| 56 | RD | 225 | Generator Turn On Signal |
| 57 | L-BU/WH | 2126 | IC 6 Control |
| 58 | D-GN/WH | 2124 | IC 4 Control |
| 59 | D-GN | 2125 | IC 5 Control |
| 60 | BN | 582 | TAC Motor Control - 2 |
| 61 | L-BU | 2123 | IC 3 Control |
| 62 | D-BU/WH | 1869 | CKP Sensor Signal |
| 63 | YE | 581 | TAC Motor Control - 1 |
| 64 | BN/WH | 2130 | Low Reference |
| 65 | PU/WH | 2128 | IC 8 Control |
| 66 | RD/WH | 2122 | IC 2 Control |
| 67 | - | - | Not Used |
| 68 | D-BU | 496 | Knock Sensor 1 Signal |
| 69 | GY | 1716 | Low Reference |
| 70 | TN | 1667 | HO2S Low Signal - Bank 2 Sensor 1 |
| 71 | GY | 2303 | Low Reference |
| 72 | L-BU | 1876 | Knock Sensor 2 Signal |
| 73 | BK | 450 | Ground |
Engine Control Module (ECM) C3
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | - | - | Not Used |
| 2 | BN | 2391 | HO2S Heater Low Control - Bank 1 Sensor 2 |
| 3 | RD/WH | 3223 | HO2S Heater Low Control - Bank 2 Sensor 2 |
| 4-5 | - | - | Not Used |
| 6 | D-BU | 1809 | Brake Booster Vacuum Sensor Signal (DOD) |
| 7-10 | - | - | Not Used |
| 11 | YE | 492 | MAF Sensor Signal |
| 12-14 | - | - | Not Used |
| 15 | GY | 416 | 5-Volt Reference (DOD) |
| 16-17 | - | - | Not Used |
| 18 | TN/WH | 1669 | HO2S Low Signal - Bank 1 Sensor 2 |
| 19 | PU/WH | 1668 | HO2S High Signal - Bank 1 Sensor 2 |
| 20 | PU | 1670 | HO2S High Signal - Bank 2 Sensor 2 |
| 21 | TN | 1671 | HO2S Low Signal - Bank 2 Sensor 2 |
| 22-23 | - | - | Not Used |
| 24 | BK | 2760 | Low Reference |
| 25-28 | - | - | Not Used |
| 29 | GY/BK | 1694 | 4WD Low Signal (NP8) |
| 30-32 | - | - | Not Used |
| 33 | GY | 2365 | Low Reference |
| 34 | TN | 472 | IAT Sensor Signal |
| 35 | GY | 597 | 5-Volt Reference |
| 36 | BK | 452 | Low Reference (DOD) |
| 37 | - | - | Not Used |
| 38 | TN/BK | 464 | Delivered Torque Signal |
| 39-44 | - | - | Not Used |
| 45 | YE | 400 | Signal High - Front |
| 46 | - | - | Not Used |
| 47 | OG/BK | 463 | Requested Torque Signal |
| 48 | - | - | Not Used |
| 49 | BK | 2759 | Low Reference |
| 50 | - | - | Not Used |
| 51 | D-GN/WH | 459 | A/C Compressor Clutch Relay Control |
| 52-56 | - | - | Not Used |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.