| Engine and Hydraulic Pump Control (Connector 1) | |||
|---|---|---|---|
| Pin No. | Function | Normal Voltage | Measure Point |
| 1 | +Battery | 18 DCV – 32 DCV | Ground |
| 2 | Ground | 0 DCV | Ground |
| 4 | Air Heater Controller | Within several seconds after the key start switch is turned to the ON position: approx. 0 DCV. Other than the temperatures below: 14 DCV to 17 DCV. The time will change according to the temperature of the coolant. 1. 10 °C (50 °F) or higher for 1 second. ( 312C, 315C) 2. 0 °C (32 °F) for 2.5 seconds. ( 319C, 320C, 322C) 3. -15 °C (5 °F) for approx. 19 seconds. ( 312C, 315C) 4. -30 °C (-22 °F) or lower for 25 seconds. ( 319C, 320C, 322C) |
Ground |
| 7 | Attachment pump pressure switch ( 319C, 320C, 320C LRR ONLY) |
When equipped and when the attachment pedal is being operated: approx. 0 DCV. When equipped and when the attachment pedal is NOT being operated: 14 DCV to 17 DCV. |
Ground |
| 8 | Hammer pressure switch ( 319C, 320C, 320C LRR ONLY) |
Hammer pressure switch is ON: approx. 0 DCV. Hammer pressure switch is OFF: 14 DCV to 17 DCV. |
Ground |
| 9 | Engine speed dial (position 1) | Engine speed dial positions 1, 2, 5, 6, 9, 10: approx. 0 DCV. Engine speed dial position 3, 4, 7, 8: 14 DCV to 17 DCV. |
Ground |
| 10 | Engine speed dial (position 2) | Engine speed dial positions 2, 3, 4, 5, 10: approx. 0 DCV. Engine speed dial position 1, 6, 7, 8, 9: 14 DCV to 17 DCV. |
Ground |
| 11 | One Touch Low Idle Switch | One touch low idle switch – During operation; approx. 0 DCV. When NOT being operated: 14 DCV to 17 DCV. |
Ground |
| 12 | AEC mode switch | AEC mode switch- During operation; approx. 0 DCV. When NOT being operated: 14 DCV to 17 DCV. |
Ground |
| 13 | +Battery | 18 DCV to 32 DCV | Ground |
| 14 | Ground | 0 DCV | Ground |
| 16 | Overload alarm release switch | Overload alarm release switch- When operated: approx. 0 DCV When NOT operated: 14 to 17 DCV |
Ground |
| 17 | Implement pressure switch ( 312C, 315C ONLY) |
Front line when swing control lever is operated: approx. 0 DCV Front line when swing control lever is NOT operated: 14 to 17 DCV |
Ground |
| 18 | ATT stem 2 swing cancel | When the attachment controller is installed. Approx. 0 DCV when ATT stem 2 is being operated. Approx. 14 DCV to 17 DCV when ATT stem 2 is NOT being operated. |
Ground |
| 19 | Engine speed dial (position 3) | Engine speed dial positions 4, 5, 6, 7, 8, 9, 10: approx. 0 DCV. Engine speed dial position 1, 2, 3: 14 DCV to 17 DCV. |
Ground |
| 20 | Engine speed dial (position 4) | Engine speed dial positions 8, 9, 10: approx. 0 DCV. Engine speed dial position 1, 2, 3, 4, 5, 6, 7: 14 DCV to 17 DCV. |
Ground |
| 21 | Travel mode switch | Travel mode switch- During operation: approx. 0 DCV When NOT being operated: 14 DCV to 17 DCV. |
Ground |
| 22 | Travel alarm cancel switch | Travel alarm cancel switch- During operation: approx. 0 DCV. When NOT being operated: approx. 14 DCV to 17 DCV. |
Ground |
| 23 | Key switch | 18 DCV to 32 DCV | Ground |
| 28 | ATT stem 1 swing cancel | When the attachment controller is installed. During ATT stem 1 operation: approx. 0 DCV. When ATT stem 1 is NOT operated: 14 DCV to 17 DCV. |
Ground |
| 29 | Implement/Swing- Joystick pressure switch ( 319C, 320C, 321C, 322C ONLY) |
Joystick pressure switch- During operation: approx. 0 DCV. When NOT being operated: 14 DCV to 17 DCV. |
Ground |
| 30 | Left travel pressure switch Travel pressure switch-( 312C, 315C, 321C) |
Left travel pressure switch- During operation: 0 DCV. When Not being operated: 14 DCV to 17 DCV. |
Ground |
| 31 | Coolant level switch | When the engine coolant level is at the specified level or higher (ON): approx. 0 DCV. When engine coolant level is below the specified level (OFF): 14 DCV to 17 DCV. |
Ground |
| 32 | Hydraulic oil level switch | Hydraulic oil level is at the specified level or higher (ON): approx. 0 DCV. Hydraulic oil level is below the specified level (OFF): 14 DCV to 17 DCV. |
Ground |
| 33 | Cat Data Link (+) | 3.0 DCV to 4.6 DCV | Ground |
| 39 | Right travel pressure switch ( 319C, 320C, 321C, 322C ONLY) |
When the travel lever is being operated: approx. 0 DCV. When NOT being operated: 14 DCV to 17 DCV. |
Ground |
| 40 | Engine oil level switch | Engine oil level is above the specified level (ON): approx. 0 DCV. Engine oil level is below the specified level (OFF): 14 DCV to 17 DCV. |
Ground |
| 41 | Engine oil pressure switch | When engine is in operation: approx. 0 DCV. When engine is NOT in operation: 14 DCV to 17 DCV. |
Ground |
| 42 | Hydraulic filter switch (clogged) | Hydraulic filter in normal: approx. 0 DCV. Hydraulic filter is clogged: 14 DCV to 17 DCV. |
Ground |
| 43 | Cat Data Link- | 0.1 DCV to 1.2 DCV | Ground |
| 45 | ATT stem 3 swing cancel | With the attachment controller equipped. When ATT stem 3 is being operated: approx. 0 DCV. When ATT stem 3 is NOT being operated: 14 DCV to 17 DCV. |
Ground |
| 46 | ATT stem 4 cancel switch | With the attachment controller equipped. When ATT stem 4 is being operated: approx. 0 DCV. When ATT stem 4 is NOT being operated: 14 DCV to 17 DCV. |
Ground |
| 47 | Water separator level switch | When water separator is NORMAL: 14 DCV to 17 DCV. When water separator need draining: approx. 0 DCV. |
Ground |
| 48 | Air filter switch (clogged) | When air cleaner is NORMAL: 14 DCV to 17 DCV. When air cleaner is clogged: approx. 0 DCV. |
Ground |
| 53 | Straight travel pressure switch ( 319C, 320C ONLY) |
Straight travel pedal- During operation: approx. 0 DCV. When NOT being operated: 14 DCV to 17 DCV. |
Ground |
| Engine and Hydraulic Pump Control (Connector 2) | |||
|---|---|---|---|
| Pin No. | Function | Normal Voltage | Measure Point |
| 1 | Straight travel solenoid ( 319C, 320C, 320C LRR, 321C, 322C ONLY) |
When any of the following components are operated: Right lever Left Lever Joy stick Straight travel pedal The voltage is 18 DCV to 32 DCV. When NOT being operated: approx. 0 DCV. |
Ground |
| 2 | Travel speed solenoid | Travel speed = “Rabbit” and travel lever is being operated and the pump delivery pressure is at the value specified for the travel speed or lower: 18 DCV to 32 DCV. Other than specified above: approx. 0 DCV. |
Ground |
| 4 | Swing parking brake cancel solenoid | (Fine swing NOT equipped) – When the joystick is being operated: 18 DCV to 32 DCV. When joystick is NOT being operated: 0 DCV. (However, immediately after the joystick is returned to the neutral condition, 18 DCV to 32 DCV is held for approximately 6.5 seconds) (Fine swing equipped) Fine swing switch OFF: approx. 0 DCV. Fine swing switch ON: 18 DCV TO 32 DCV. |
Ground |
| 6 | Fine swing switch | (Fine swing non-equipped) Approx. 0 DCV. (Fine swing equipped) Fine swing switch = OFF: approx. 0 DCV. Fine swing switch = ON: 14 DCV to 17 DCV. |
Ground |
| 7 | Power shift pressure proportional reducing valve | When the control lever is n the neutral position: 6 to 9 DCV. When the lever is being operated the voltage will drop. |
Ground |
| 8 | Flow limit pressure proportional reducing valve | When the flow limit function is not used: 0 DCV. When the flow limit function is being used: The voltage varies according to the limit flow. |
Ground |
| 9 | Priority negative control pressure proportional reducing valve | When pressure compensation type flow dividing valve is NOT being operated: approx. 0 DCV. | Ground |
| 13 | Travel alarm | When travel lever is being operated: 18 to 32 DCV. When the travel lever is NOT operated: approx. 0 DCV. |
Ground |
| 14 | AEC mode lamp | AEC = First stage: 18 to 32 DCV. AEC = Second stage: approx. 0 DCV. |
Ground |
| 15 | Travel mode lamp | Travel mode = “Tortoise”: 18 DCV to 32 DCV. Travel mode = “Rabbit” : approx 0 DCV. |
Ground |
| 16 | Speed sensor (-) | Approx. 0 DCV | Ground |
| 17 | Neutral start relay 322C ONLY |
Hydraulic activation control lever: LOCKED Starter switch: engine Start postion : 18 to 32 DCV Other than above: 0 DCV |
Ground |
| 19 | Proportional reducing valve return (1) | Approx. 0 DCV | Ground |
| 20 | Proportional reducing valve return (2) | Approx. 0 DCV | Ground |
| 21 | Proportional reducing valve return (3) | Approx. 0 DCV | Ground |
| 22 | Proportional reducing valve return (4) | Approx. 0 DCV | Ground |
| 23 | Action alarm | When engine oil pressure is NORMAL: approx. 0 DCV. When engine oil pressure is too low: 18 DCV to 32 DCV. |
Ground |
| 24 | Travel alarm cancel lamp | When travel alarm cancel switch is being operated: 0 DCV. When travel alarm cancel switch is NOT operated: 18 DCV to 32 DCV. |
Ground |
| 25 | Speed sensor (+) | When engine is in high idle: approx. 0.7 to 5 ACV. Measured by using ACV range. |
Conn. 2-16 |
| 29 | Coolant temperature sensor | Temperature sensor resistance/voltage
0 °C (32 °F) approx. 23.14k / approx. 9.7 DCV. 25 °C (77 °F) approx. 6.82k / approx. 7.1 DCV. 50 °C (122 °F) approx. 2.47k / approx. 4.2 DCV. 75 °C (167 °F) approx. 1.08k / approx. 2.3 DCV. |
Ground |
| 30 | Fuel level sensor | Fuel remaining / Sensor resistance / Voltage: Full / approx. 8.0k / approx. 0.2 DCV Half / approx. 33.8k / approx. 1.0 DCV Empty / approx. 83.5 / approx. 2.2 DCV |
Ground |
| 35 | Alternator R terminal | When the engine is in high idle: approx. 14 DCV. | Ground |
| 36 | Governor feedback. | 0.7 DCV to 9.0 DCV voltage will vary in proportion to engine speed dial. (Dial 1: low, 10: high) | Ground |
| 37 | Pump delivery pressure sensor | 0.7 DCV to 9.0 DCV – The voltage will vary in proportion to the delivery pressure of the first pump. When NOT operated: 0.7 to 2.5 DCV During relief operation: 7 to 9 DCV |
Ground |
| 39 | Hydraulic oil temperature sensor | Temperature sensor resistance / voltage:
0 °C (32 °F) approx. 23.14k / approx. 9.7 DCV. 25 °C (77 °F) approx. 6.82k / approx. 7.1 DCV. 50 °C (122 °F) approx. 2.47k / approx. 4.2 DCV. 75 °C (167 °F) approx. 1.08k / approx. 2.3 DCV. |
Ground |
| 44 | Governor command signal | 0.5 to 7.0 DCV The voltage will vary in proportion to the engine speed dial. (Dial 1: Low, Dial 10: High) |
Ground |
| 45 | Pump delivery | 0.7 to 9 DCV The voltage will vary in proportion to the second delivery pump pressure. When not in operation: 0.7 DCV to 2.5 DCV. When in relief operation: 7 DCV to 9 DCV. |
Ground |
| 46 | Boom hold pressure sensor | 0.7 to 9 DCV The voltage will vary in proportion to the boom hold pressure. (In low pressure: low voltage, In high pressure: high voltage.) |
Ground |
| 47 | Backup switch | (Backup switch = OFF) 0.7 DCV to 9 DCV The voltage will vary in proportion to the engine speed dial position. (Dial 1: low, Dial 10: high) (Backup switch = ON) |
Ground |
| 52 | 12 DCV power supply ( 319C, 320C, 320C LRR, 321C, 322C ONLY) |
Approx. 12 DCV. | Ground |