Engine Control Module (ECM) Connector End Views



Engine Control Module (ECM) Connector End Views

|Table 1: |Engine Control Module (ECM) C1 |

|Table 2: |Engine Control Module (ECM) C2 |

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|Engine Control Module (ECM) C1 |

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|[pic] |

|[pic] |

|Connector Part Information |15336786 |

| |28 Way F Bosch (BK) |

|Pin |Wire Color |Circuit No. |Function |

|1 |-- |-- |Not Used |

|2 |GY |705 |5 Volt Reference |

|3 |D-GN |890 |Fuel Tank Pressure Sensor Signal |

|4 |PU |420 |Stop Lamp Switch Signal |

|5 |GY |1884 |Cruise Control Set/Coast and Resume/Accelerate Switch Signal (K34) |

|6 |-- |-- |Not Used |

|7 |PU |1589 |Fuel Level Sensor Signal |

|8 |BN |4 |Accessory Voltage |

|9 |-- |-- |Not Used |

|10 |BK |2759 |Low Reference |

|11 |L-BU |20 |Stop Lamp Switch Signal |

|12 |PU |1807 |ECM Class 2 Serial Data |

|13 |TN/WH |2500 |High Speed GM LAN Serial Data Bus+ |

|14-15 |-- |-- |Not Used |

|16 |BN/WH |419 |MIL Control |

|17 |WH |1310 |EVAP Canister Vent Solenoid Control |

|18 |PU |1807 |ECM Class 2 Serial Data (JM4) |

|19 |TN |2501 |High Speed GM LAN Serial Data Bus- |

|20 |-- |-- |Not Used |

|21 |D-GN/WH |459 |A/C Compressor Clutch Relay Control (C60) |

|22 |OR |480 |Battery Positive Voltage |

|23 |PK |639 |Ignition 1 Voltage |

|24 |-- |-- |Not Used |

|25 |D-GN/WH |465 |Fuel Pump Relay Control |

|26 |L-GN |1887 |Cruise Control Servo Move Direction Signal (K34) |

|27 |L-BU |1888 |Cruise Control Servo Clutch Control (K34) |

|28 |PK |1886 |Cruise Control Servo Move Signal (K34) |

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|Engine Control Module (ECM) C2 |

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|[pic] |

|[pic] |

|Connector Part Information |15336796 |

| |80 Way F 101/ Bosch (BK) |

|Pin |Wire Color |Circuit No. |Function |

|1 |TN |2501 |High Speed GM LAN Serial Data Bus- |

|2 |-- |-- |Not Used |

|3 |L-GN |432 |MAP Sensor Signal |

|4 |D-BU |417 |TP Sensor Signal |

|5 |-- |-- |Not Used |

|6 |RD/BK |380 |A/C Refrigerant Pressure Sensor Signal (C60) |

|7 |YE |410 |ECT Sensor Signal |

|8 |-- |-- |Not Used |

|9 |PU |574 |Low Reference |

|10 |YE |573 |CKP Sensor Signal |

|11 |D-BU |496 |Knock Sensor Signal |

|12 |PU |1666 |HO2S High Signal Sensor 1 |

|13 |PU/WH |1668 |HO2S High Signal Sensor 2 |

|14-16 |-- |-- |Not Used |

|17 |BN/WH |633 |CMP Sensor Signal |

|18-21 |-- |-- |Not Used |

|22 |TN/WH |2500 |High Speed GM LAN Serial Data Bus+ |

|23 |-- |-- |Not Used |

|24 |OR/BK |469 |Low Reference |

|25 |BK |2752 |Low Reference |

|26 |-- |-- |Not Used |

|27 |BK |2751 |Low Reference (C60) |

|28 |BK |2761 |Low Reference |

|29-30 |-- |-- |Not Used |

|31 |GY |1716 |Low Reference |

|32 |-- |-- |Not Used |

|33 |TN |1667 |HO2S Low Signal Sensor 1 |

|34 |TN/WH |1669 |HO2S Low Signal Sensor 2 |

|35-36 |-- |-- |Not Used |

|37 |TN/BK |231 |Oil Pressure Switch Signal |

|38 |GY |23 |Generator Field Duty Cycle Signal |

|39-42 |-- |-- |Not Used |

|43 |GY |2704 |5 Volt Reference |

|44 |GY |2701 |5 Volt Reference |

|45 |-- |-- |Not Used |

|46 |GY |2700 |5 Volt Reference (C60) |

|47 |TN |472 |IAT Sensor Signal |

|48 |D-GN |1433 |PNP/Clutch Start Switch Signal |

|49 |-- |-- |Not Used |

|50 |PU |401 |VSS Signal Low (M86) |

|51 |-- |-- |Not Used |

|52 |L-BU/BK |1748 |IAC Coil A Low Control |

|53-54 |-- |-- |Not Used |

|55 |BK/WH |1423 |HO2S Heater Low Control Sensor 2 |

|56 |BK |1744 |Fuel Injector 1 Control |

|57 |L-GN/BK |1745 |Fuel Injector 2 Control |

|58-60 |-- |-- |Not Used |

|61 |WH |423 |IC Timing Control |

|62 |RD |225 |Generator Turn On Signal |

|63 |OR |406 |IC Timing Control |

|64-65 |-- |-- |Not Used |

|66 |YE |447 |Starter Relay Coil Control |

|67 |D-GN |335 |Cooling Fan Relay Control |

|68 |-- |-- |Not Used |

|69 |BK |2760 |Low Reference |

|70 |YE |400 |VSS Signal High (M86) |

|71 |L-GN/WH |1749 |IAC Coil B High Control |

|72 |L-GN/BK |444 |IAC Coil B Low Control |

|73 |L-BU/WH |1747 |IAC Coil A High Control |

|74 |-- |-- |Not Used |

|75 |D-GN |676 |HO2S Heater High Control Sensor 1 |

|76 |D-GN/WH |428 |EVAP Canister Purge Solenoid Control |

|77 |PK/BK |1746 |Fuel Injector 3 Control |

|78 |L-BU/BK |844 |Fuel Injector 4 Control |

|79 |BK/WH |451 |Ground |

|80 |BK/WH |451 |Ground |

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Engine Control Module (ECM) Replacement

Removal Procedure

Notice: In order to prevent any possible electrostatic discharge damage to the ECM, do not touch the connector pins or the soldered components on the circuit board.

Notice: Always turn the ignition off when installing or removing the ECM connectors in order to prevent damage to the components.

Important: It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil life will default to 100%. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5000 km (3,000 mi) from the last engine oil change.

1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.

2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.

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3. Disconnect the small ECM harness connector (3) from the ECM.

4. Remove the bolt retaining the large ECM connector to the ECM.

5. Disconnect the large ECM harness connector (4) from the ECM.

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Notice: Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables or when charging the vehicles battery.

6. Use the retaining tab to release the ECM from the underhood junction block bracket.

Installation Procedure

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Notice: Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables or when charging the vehicles battery.

1. Use the retaining tab to secure the ECM, when installing the ECM to the underhood junction block bracket.

Notice: Refer to Fastener Notice in Cautions and Notices.

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2. Connect the large ECM harness connector (4) to the ECM.

Tighten

Tighten the bolt to 4 N·m (35 lb in).

3. Connect the small ECM harness connector (3) to the ECM.

4. Connect the negative Battery Cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.

5. Program the ECM. Refer to Service Programming System (SPS) in Programming.

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