FAILURE CODE [DR81KR]

Detail of failure The translator controller cannot obtain the information from driver status monitor in CAN communication circuit.

Action of controller Keeps the information when the failure occurred.

Phenomenon on machine System does not operate normally in some cases.

• Method of reproducing failure code: Turn the starting switch to the ON position.

• Start of CAN communication is recognized by each controller when ACC signal of starting switch is received.

Related information

• Because each controller and machine monitor is directly connected to the battery, power is continuously provided even when the starting switch is in the OFF position.

• Since signal of active line is pulse voltage, it cannot be measured by using multimeter

• The translator controller detects it and the retarder controller provides the failure information to the machine monitor

• Do the troubleshooting for the driver status monitor power supply system (Refer to the Causes 1 to 6). Then, do the troubleshooting for CAN wiring harness.

2

3 Defective No.25 of fuse BT2

1. Starting switch: OFF

2. Remove No.25 of fuse BT2 (the fuse at the bottom) If fuse is burnt out, circuit may have ground fault. (See cause 6.)

4 Open circuit in wiring harness (wire breakage or defective contact)

1. Starting switch: OFF

2. Disconnect the connector DDS1. Connect a T-adapter to the female side of DDS1.

Between DDS1 (female) (1) and ground

Resistance

5 Ground fault in wiring harness (contact with GND circuit)

6 Defective driver status monitor (power supply circuit)

7

Defective CAN terminating resistor (internal open or short circuit)

8 Open or short circuit in wiring harness

REMARK

Check ER terminal for looseness and rust Max. 1Ω

1. Starting switch: OFF

2. Disconnect the connector DDS1 from negative (-) terminal of battery. Connect a T-adapter to the female side of DDS1.

3. Connect the negative (-) terminal of the battery.

Voltage

Between battery relay terminal B and ground 20 to 30V

Between DDS1 (7) and ground 20 to 30V

If voltage appears between battery relay terminal B and ground but not between DDS1 (7) and ground, an open circuit exists in wiring harness or fuse.

1. Turn off the starting switch. Disconnect the ground cable of the battery

2. If the No.25 of fuse BT2 is blown out, replace it.

3. Disconnect the connector DDS1. Connect a T-adapter to the female side.

ResistanceBetween DDS1 (female) (7) and ground Min. 1MΩ

1. Starting switch: OFF

2. Disconnect the negative (-) terminal of the battery and insert the T-adapter to DDS1.

3. Connect the negative (-) terminal of the battery.

VoltageBetween DDS1 (7) and DDS1 (1) 20 to 30V

1. Starting switch: OFF

2. Disconnect the connectors CAN13 and CAN14. Connect the T-adapter to the male side.

Resistance

Between CAN13 (male) (A) and (B) (on the translator controller side) 120±12Ω

Between CAN14 (male) (A) and (B) (on the driver status monitor side) 120±12Ω

CAN communication line

REMARK

CAN terminating resistors of 120Ω are connected in parallel. When the circuit resistance is measured from any connector, if the combined resistance is 60Ω, the wiring harness has no open circuit.

1. Turn off the starting switch. Disconnect the ground cable of the battery.

2. Disconnect the connector TLC2 or DDS1. Connect a T-adapter to its female side.

REMARK

If short circuit is found (the resistance between terminals is 1Ω and below), disconnect all CAN communication connectors of every controller, and check whether short circuit occurs between wiring harnesses or in the controller.

Resistance Between TLC2 (female) (33) and (23) Approx. 60Ω

Between DDS1 (female) (4) and (5) Approx. 60Ω

Procedure, measurement location, criteria and remarks

1. Turn off the starting switch. Disconnect the ground cable of the battery

2. Insert a T-adapter to connectors TLC3, DDS1 and DPC1/DPC1_F.

3. Connect the ground cable of the battery, and turn the starting switch to the ON position.

Between TLC3 (14) and (21) 20 to 30V

9

Voltage

Between TLC3 (24) and (31) 20 to 30V

Between DDS1 (13) and (1) 20 to 30V

Between DPC1/DPC1_F (6) and (9) 20 to 30V

Between DPC1/DPC1_F (7) and (10) 20 to 30V

REMARK

If no failure is found by check on cause 9, this check is not required.

1. Turn off the starting switch. Disconnect the ground cable of the battery.

2. Disconnect the connectors TLC2, CAN13, CAN14, and DDS1, and connect T-adapter to female side.

10

Resistance

Between TLC2 (female) (33) and CAN13 (female) (A) Max. 1Ω

Between TLC2 (female) (23) and CAN13 (female) (B)Max. 1Ω

Between TLC2 (female) (33) and CAN14 (female) (A)Max. 1Ω

Between TLC2 (female) (23) and CAN14 (female) (B)Max. 1Ω

Between TLC2 (female) (33) and DDS1 (female) (4)Max. 1Ω

Between TLC2 (female) (23) and DDS1 (female) (5)Max. 1Ω

REMARK

If no failure is found by check on cause 10, this check is not required.

1. Turn off the starting switch. Disconnect the ground cable of the battery.

2. Disconnect the connectors TLC3, DDS1, DPC1/DPC1_F, and connect Tadapter to each female side.

Between the starting switch (ACC) and TLC3 (female) (14) and (24) Max. 1Ω

Resistance

Between the starting switch (ACC) and DDS1 (female) (13) Max. 1Ω

Between the starting switch (ACC) and DPC1/DPC1_F (female) (6) and (7) Max. 1Ω 12

Defective driver status monitor If no failure is found by the above checks, the driver status monitor is defective. (Because this is an internal defect, troubleshooting cannot be done.) 13

14

Defective translator controller If no failure is found by the checks above, the translator controller is defective. (Because this is an internal defect, troubleshooting cannot be done.)

Defective retarder controller If no failure is found by the above checks, the retarder controller is defective. (Since this is an internal defect, troubleshooting cannot be performed.)