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Home >> Isuzu >> 2007 >> Ascender RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 156 (Engine Control System & Fuel System - 5.3L - Introduction (2 Of 2)) >> Component Locator >> Engine Control Module Connectors >> Engine Control Module (ECM) C1

Engine Control Module (ECM) C1

WARNING: This page is about a different car, the 2007 GMC Envoy, 2007 Chevrolet TrailBlazer, and 2007 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Control Module (ECM) C1 Connector End View
GM1673474Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) C1 Connector Parts Information

Connector Part Information 
  • OEM: 13510837 (Early Production)/13574282 (Late Production)
  • Service: 88988373
  • Description: 56-Way F Receptacle 0.64 Series Sealed (BU)/33-Way F Sealed (BU)
Terminal Part Information 
  • Pins: 1-2, 4, 9, 12-13, 16, 18, 20-22, 24-25, 30-37, 39-40, 44, 46-49, 53, 55-56
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 7, 19
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Engine Control Module (ECM) C1 Connector Terminal Identification

Pin Wire Color Circuit No. Function
1 PU 806 Crank Voltage
2 PU 420 TCC Brake Switch/Cruise Control Release Signal
3 - - Not Used (Early Production)
- - Not Available (Late Production)
4 GY/BK 1694 4WD Low Signal (NP8)
5-6 - - Not Used (Early Production)
- - Not Available (Late Production)
7 L-BU 1320 CHMSL Supply Voltage (K34)
8 - - Not Used (Early Production)
- - Not Available (Late Production)
9 BK 2759 Low Reference
10-11 - - Not Used (Early Production)
- - Not Available (Late Production)
12 BN/WH 419 MIL Control
13 D-GN/WH 465 Fuel Pump Relay Control
14-15 - - Not Used (Early Production)
- - Not Available (Late Production)
16 D-GN 1049 Class 2 Serial Data
17 - - Not Used (Early Production)
- - Not Available (Late Production)
18 PK 1020 Ignition 0 Voltage
19 PK 439 Ignition 1 Voltage
20 OG 240 Battery Positive Voltage
21 GY/BK 87 Cruise Control Resume/Accel Switch Signal (K34)
22 D-BU 84 Cruise Control Set/Coast Switch Signal (K34)
23 - - Not Used (Early Production)
- - Not Available (Late Production)
24 YE/BK 1827 Vehicle Speed Signal
25 WH 121 Engine Speed Signal
26-29 - - Not Used (Early Production)
- - Not Available (Late Production)
30 GY 397 Cruise Control On Switch Signal (K34)
31 BK 452 Low Reference
32 GY 416 5-Volt Reference
33 WH/BK 1164 5-Volt Reference
34 GY 2709 5-Volt Reference
35 TN 1274 5-Volt Reference
36 BN 1271 Low Reference
37 PU 1272 Low Reference
38 - - Not Used (Early Production)
- - Not Available (Late Production)
39 D-GN/WH 817 Vehicle Speed Signal
40 YE 5991 Powertrain Relay Coil Control
41-43 - - Not Used (Early Production)
- - Not Available (Late Production)
44 PU 1589 Fuel Level Sensor Signal
45 - - Not Used (Early Production)
- - Not Available (Late Production)
46 D-BU 1809 Brake Booster Vacuum Sensor
47 D-BU 1161 APP Sensor 1 Signal
48 D-GN 890 Fuel Tank Pressure Sensor
49 L-BU 1162 App Sensor 2 Signal
50-52 - - Not Used (Early Production)
- - Not Available (Late Production)
53 D-GN/WH 459 A/C Compressor Clutch Relay Control
54 - - Not Used (Early Production)
- - Not Available (Late Production)
55 WH 1310 EVAP Canister Vent Solenoid Control
56 YE/BK 625 Starter Enable Relay Control
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