DTC: 0087 Abnormally Low Common Rail Pressure (supply pump not sending pressure

Trouble Recovery

Trouble recovery can be roughly divided into 2 types. Depending on the actual machine, an additional 1 cycle is sometimes necessary after the cycle below to delete the DTC displayed on the monitor screen. *1 In the cycle in which the DTC was detected, even if the machine recovers to normal (including intermittent problems), the DTC does not disappear from the monitor screen and backup mode does not recover to normal mode. After the key is switched OFF, when the engine is restarted, the trouble judgment is made and if it is judged that the status is normal, • Generally, the trouble judgment ends immediately and the DTC disappears and operation recovers to normal if it is judged that the status is normal. • Trouble judgment takes 3 - 10 min. for a temperature sensor, and the DTC disappears and operation recovers to normal if it is judged that the status is normal.

Name

1. DTC detection 2. Repair and inspection 3. Recovery to normal *2 If the machine recovers to normal (including intermittent problems) in the cycle in which the DTC was detected, the DTC disappears from the monitor screen and backup mode recovers to normal mode.

Name

1. DTC detection 2. Recovery to normal

Screen Display Details Message display list

Display Message type Display ON timing Display OFF timing

LOW OIL PRESS. Warning When "Engine oil pressure abnormally low" trouble occurs None Does not go off during the key ON cycle CHECK ENGINE Warning When "ECM mismatch" trouble occurs Also, when a DTC is sent from the ECM None Does not go off during the key ON cycle

ELEC. PROBLEM (*1) Warning When any of the trouble below occurs "Sensor; Pressure (P1)", "Sensor; Pressure (P2)", "Sensor; Pressure (N1)","Sensor; Pressure (N2)", "Sensor; Pressure (Overload)", "Sensor; Pressure (Bottom)", "Sensor; Pressure (Rod)", "Sensor; Pressure (Upper)", "Sensor; Pressure (Swing), "Sensor; Pressure (Travel)" "Sensor; Fuel level", "Sensor; Oil temperature", "Sensor; Angle (Boom)", "Sensor; Angle (Arm)", "Sensor; Angle (Offset)", "Pressure switch; Return filter clog" "Solenoid; Swing brake", "Solenoid; Travel high-speed", "Solenoid; Power save" "Relay; Feed pump automatic stop", "Solenoid; Option return circuit", "Solenoid; Free swing" "Solenoid; Fan reverse", "Air conditioner signal output", "Buzzer; Liftcrane" "Beacon and solenoid; Bucket lock", "Solenoid; Lever lock" "Proportional valve; Pump horsepower", "Proportional valve; Pump flow" "Proportional valve; Fan", "Proportional valve; Boom", "Proportional valve; Offset", "Proportional valve; Arm", "Communication monitor", "Communication ECM", "Communication computer B", "Communication computer S", "CAN bus" None Does not go off during the key ON cycle

OVER HEAT Warning When any of the trouble below occurs "Abnormally high coolant temperature 1", "Abnormally high oil temperature" When all the troubles below are recovered from "Abnormally high coolant temperature 1" "Abnormally high oil temperature"

LOW COOLANT Warning When "Coolant level low" trouble occurs ALTERNATOR Warning When "Abnormally low alternator voltage" trouble occurs CHECK HYD. OIL FILTER Warning When "Return filter clogged" trouble occurs

AIR FILTER Warning When "Air cleaner clogged" trouble occurs

None Does not go off during the key ON cycle None Does not go off during the key ON cycle None Does not go off during the key ON cycle None Does not go off during the key ON cycle BOOST TEMP. HIGH Warning When the "Abnormally high boost temperature 1" trouble occurs When the "Abnormally high boost temperature 1" trouble is recovered from

LOW FUEL Warning When "Fuel level low" trouble occurs When "Fuel level low" trouble is recovered from

SWITCH TO 1-PUMP Alert When the breaker mode is ON and 2 pumps flow is ON ENGINE STOP Alert When the engine emergency stop switch is ON When the conditions on the left are no longer met When the conditions on the left are no longer met

WATCH OUT FOR THE LOAD! Alert When a hanging load 90 % or more of the rated load is hung (liftcrane) When the conditions on the left are no longer met

OVERLOAD! Alert When a hanging load 100 % or more of the rated load is hung (liftcrane) When the conditions on the left are no longer met HANGING GEAR INTERFERENCE! Alert When the hanging height exceeds the liftcrane's rated height (liftcrane) When the conditions on the left are no longer met

WATCH OUT FOR CAB INTERFERENCE! Alert When the interference prevention f comes close to the cab unction is ON and the attachment When the conditions on the left are no longer met

INTERFERENCE PREVENTION DEVICE OFF! Alert When the interference prevention function is switched OFF When the conditions on the left are no longer met

Display Message type Display ON timing Display OFF timing

OVER LOAD Alert When the boom cylinder bottom pressure exceeds the set pressure When the conditions on the left are no longer met FAN REVERSING Alert When the reverse fan switch is ON. When the conditions on the left are no longer met

ENG. IDLING Icon During one-touch idling or auto idling When the conditions on the left are no longer met

POWER UP Icon During auto pressure boost

ENG. PRE HEAT Icon When power ON to glow plug AUTO WARM UP Icon During auto warm-up INITIAL SETTINGS INCOMPLETE Status When the liftcrane interference prevention initial adjustment has not been completed When the conditions on the left are no longer met When the conditions on the left are no longer met When the conditions on the left are no longer met

When the conditions on the left are no longer met

SERVICE DUE Status When the key is ON and the hour meter has reached the regulation time (*1) Even if one of the following troubles occurs, "ELEC. PROBLEM" is not issued. "BZ travel alarm", "Monitor; Thermistor", "Air conditioner coolant temperature signal output" After 1 min. has passed after the key is switched ON.

Message type 1. Status..........................Message only 2. Alert.............................Intermittent warning continues to sound at 1-second intervals. 3. Warning.......................Continuous warning sounds for just 5 sec. 4. Icon..............................Icon only displayed

Abnormality Display Diagnostic trouble code display

1. Purpose and summary

When trouble occurs, a diagnostic trouble code (DTC) is displayed on the user screen.

This enables the operator to verbally communicate the trouble to the service engineer. 2. Screen

Just after the work mode with a ! mark next to it, the diagnostic trouble code is displayed as a 4-digit number.

If there is no trouble, nothing at all is displayed.

3. Trouble display

The "ELEC. PROBLEM" or "CHECK ENGINE" message is displayed.

When trouble occurs, the corresponding diagnostic trouble code is displayed. For trouble in which the location is understood from the message, a code is not displayed.

For details, see the "Main unit Diagnostic Trouble Code List". All the diagnostic trouble codes sent from the ECM are subject to display. 4. Displayed trouble status

Only current and ongoing troubles are displayed. Troubles that have been recovered from are not displayed. 5. Multiple trouble display

When multiple troubles occur, they are displayed in turn at 5-second intervals.

ELEC. PROBLEM

DTC: 0087 Abnormally Low Common Rail Pressure (supply pump not sending pressure)

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