Cummins QSB6.7 Engine Wiring Diagram Manual

Sheet 1

Cummins QSB6.7 Wiring Diagram Details BATTERY (+) BATTERY (+) BATTERY (+) BATTERY (+) BATTERY (+) 30 AMP ATO 1 2 BATTERY (-) BATTERY (-) BATTERY (-) BATTERY (-) BAT1 1 AMP ATO 1 J5 B A H J E F G C D 2 BATTERY (+) BATTERY (-) J7CAP A B C C B A J6CAP A B C C B A J7 J6 BATTERY (+) CAN_A (+) CAN_A (-) J1939 (+) J1939 (-) 1 2 KEYSWITCH 5 AMP ATO IGN 1 SPARE_LAMP START BATT ACC 2 1 STOP_LAMP 2 1 2 WARNING_LAMP 1 WAIT_TO_START_LAMP KYSW 2 2 1 TACHOMETER J15_C0 2 1 ISC_2_SWITCH CRUISE_CONTROL_SET/DECREMENT_SW 3 1 2 1 2 CRUISE_CONTROL_RESUME/INCREMENT_SW OEM_SW/MUS_SW_3 ALTERNATE_LOW_IDLE 2 1 2 1 2 1 CRUISE_ON_OFF/MUS_COMP_SW IDLE_VALIDATION_2_OFF_IDLE_SW DIAGNOSTIC/SPARE_SW 2 1 E_BRK_SW_1/MUS_SW_2 2 1 2 1 2 1 E_BRK_SW_2 2 1 ISC_3_W_VALIDATION_SW 2 1 IDLE_VALIDATION_1_ON_IDLE_SW 2 1 CLUTCH_SW/SERVICE_BRAKE_SW/MUS_SW_1 SWITCH_AND_TEMP_SENSOR_RETURN MANUAL_FAN/AC_PRESSURE_SW 2 1 2 1 CONSTRAINED_POWER_SW/OEM_TEMP_2 B A C E F D SENSOR_SUPPLY_5 PEDAL_POSITION_2 PEDAL_POSITION_2_RETURN PEDAL_POSITION_1_SUPPLY PEDAL_POSITION_1 PEDAL_POSITION_1_RETURN J10 2 1 2 1 ISC_1_SW REMOTE_THROTTLE_SW C B A REMOTE_THROTTLE/VARIABLE_ISC OEM_SENSOR_RTN C B A FAN_SPEED C B A FAN_SPEED_2 C B A COOLANT_LEVEL J11 A 1 VEHICLE_SPEED (-) VEHICHLE_SPEED (+) J19 B A DUAL_OUTPUT_A OUTPUT_RETURN_1 J20 B A DUAL_OUTPUT_B J21 B A INTAKE_AIR_HEATER_RELAY_CONTROL J22 B A STARTER_LOCKOUT J22_C0 J16 J24 RETURN_1 B A FAN_CLUTCH J23 SWITCH_RETURN_3 FC_RETURN_2 2 1 AXG_SW/MUS_ENABLE_SW 2 1 AIR_INTAKE_SHUTOFF_SW SPARE_SW EPD_SHUTDOWN_OVRD_SW MANUAL_BOOST_POWER_SW HSG_DROOP_SEL_SW 2 1 2 1 2 1 2 1 2 1 PARKING_BRAKE_SW SPARE_RTN 3 2 1 SPARE_AD_B_01 J31_C3 3 2 1 1 A OEM_PRESSURE SENSOR_RTN 3 2 1 SPARE J31_C0 1 2 J35 DEDICATED_PWM B A INTAKE_AIR_SHUTOFF_PWM RETURN_5 2 1 J32 FREQ_THROTTLE 1 2 J37 J16_C1 OEM_TEMP RETURN_6 Revision 0.0 MAR 2012 Diagram Page 1 of 5 J3 ) ) ) ) ) ) ) ) CM2250 1 2 11 12 J3 21 22 31 32 J3-OEM 17 18 3 J1-ENGINE J2-ENGINE 20 9 8 16 6 7 10 33 38 29 28 26 24 59 37 50 36 30 60 49 27 L A 19 I T 25 N 57 E D 52 I F 53 N 23 O 42 C 51 S 41 N I M M 39 U 40 C 43 56 46 47 44 55 58 48 45 54 34 35 14 13 5 4 15 A B 1 AUX GOV/T _ 2 24 23 22 21 20 19 18 17 W 16 W 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 J4

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Sheet 2

Cummins QSB6.7 Wiring Diagram Details ECM Power Connections Engine J3_PARTIAL_c4 Grounding Stud 21 J3 OEM 60-PIN CONNECTOR 22 31 32 1 2 11 12 30A As appropriate Ignition (-) (+) Start Battery Accessory Battery Datalink Connectors 9-Pin Diagnostic Connector OEM 60-Pin Connector J1939 (-) Stub J1939 (+) Stub J1939 (+) Backbone J1939 (+) Stub J1939 (-) Backbone J1939 (-) Stub 120 Ohm Term Res. 120 Ohm Term Res. As appropriate (SEE NOTE #1) Battery (+) Battery (-) NOTES: 1. The Cummins Service Tool requires a minimum of 1 Amp. The fuse and wiring should be sized according to all devices that may be connected to the diagnostic connector. 2. The CM2250 ECM does not support J1587. 3.

The CM2250 ECM does not provide a shield connection for the J1939 datalink. The ECM may be connected to a shielded datalink backbone as described in SAE Recommended Practice J1939-15. Diagram Page 2 of 5 Revision 0.0 MAR 2012 CAP C D E H J B A F G

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Sheet 3

Cummins QSB6.7 Wiring Diagram Details Detail 'A' - Intake Air Heaters - 12 Volt OEM Side 2 AWG (-) (+) Intake Air Heater Output OEM 60-Pin Connector ECM Return 2 AWG 250 A 12V System Cummins Supplied Air Heater + 2 AWG + Detail 'B' - Intake Air Heaters - 24 Volt OEM Side 6 AWG (+) (-) Intake Air Heater Output OEM 60-Pin Connector ECM Return 24V System 150 A Cummins Supplied Air Heater 6 AWG 6 AWG + OEM responsibility (assume 12V system is used): 1. Procure and install Heavy solenoid switch ("off engine" mount for environment durability) with following charateristics:

- 12 VDC SPST (Ametek Prestolite switch SBJ-4201 works) - 200 amps steady state coninuous current rating - Break current 200 amps - 600 Amp In rush capability - Water resistant 2. Provide wiring capable of 200 continous amps from battery positive terminal to Heavy Duty solenoid battery (+) terminal and from heavy duty solenoid output to grid heater element input 3. Provide solenoid control wiring from the ECM OEM connector to the "off engine" mounted heavy solenoid switch. 4. Note that grid heater current is returned to Battery negative via engine block ground. OEM is responsible for installation of engine block ground in vehicle installations. Diagram Page 3 of 5 Revision 0.0 MAR 2012

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Sheet 4

Cummins QSB6.7 Wiring Diagram Details Starter Lockout Feature Relay (K2) shown with the normally open contact, requires the SLO output to be "ON" (battery voltage) at "Key-ON" and "OFF" when rpm > 400rpm. Relay K2 (supplied by OEM) used for Starter Lockout feature. ECM CM 2250 KEYSWITCH IGN START BATT ACCY Starter Lockout K2 Return Relay K2 F1- as required per Alternator Size MASTER DISCONNECT SWITCH F1 Alternator G S B+ BATTERY K3 Starter Solenoid K3 Reference AEB 24.53 for Starter & Alternator wiring requirements. Gnd M Motor Starter Common Ground Point Diagram Page 4 of 5 Revision 0.0 MAR 2012 Relay K1 K1

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