THE ECO-GOVERNOR CHECKLIST (CONT’D) No.
I/O
Design
Electrical component design and check 15 Is the E-ECU’s lamp load such as the trouble monitor lamp lower than 12 V/3.4 W? 16 Is the minimum working current of switches directly connecting to the E-ECU not exceeding 10 mA? The contact input current of the E-ECU is 10mA at the rated voltage of 12 V. Do not use the switches that require more contact current. 17 Is the Bobcat genuine coolant temperature sensor used for the E-ECU? Also, is the load besides the E-ECU connected to the E-ECU’s TW terminal (E25)? 18 When the oil pressure switch (such as 119761-39450) is connected to the EECU’s APP-IP2 terminal (E14), is resistance or lamp connected to enable the contact circuit of the oil pressure switch to become more than 100mA? An instantaneous power interruption of 1 ms or longer of the E-ECU power supply may cause trouble including changing the engine speed and hindering the engine from starting. 19 Is the alternator’sIG terminal independent from the circuit of the E-ECU’s IGNSW terminal (E7) and the E-ECU’s RACK-RLY terminal (E33) from the rack actuator relay? In some alternators, the generated current flows in reverse from the IG terminal.In this case, the engine may not stop even the key switch is turned off.When the circuit cannot be made independent, install diode in the IG terminal to avoid the current to flow in reverse from the IG terminal. When the Bobcat genuine alternator is used, this check isn’t required. 20 The key switch: the E-ECU power supply current not open between the ON and Start positions ñ is this kind of key switch used? Having more than 10ms momentary power failure at the time of returning the key switch from the Start to ON positions may cause trouble including changing the engine speed and hindering the engine from starting.Be noted that the above-mentioned trouble tends to occur easily to the key switch at cold temperature. 21 When using the CAN terminal resistor inside the ECU, are E30 and E39 connected with a jumper as short as possible? When using the CAN terminal resistor inside the ECU, are E30 and E39 connected with a jumper as short as possible? 22 Are the E-ECU terminals loads other than intended or specified connected? Wiring harness design 23 Is the E-ECU’s GND terminal (E45, E47) earthed one point as closely as possible to the battery minus terminal? 24 Is the main relay fuse’s power supply side circuit directly branched from the battery plus terminal? If the main relay’s power supply circuit is branched from the starter B terminal and other large current device, it will be difficult to maintain the E-ECU power supply voltage of more than 6.0 V due to the voltage drop. 25 Is the capacity of main relay fuse 10A and connected besides the E-ECU, rack actuator relay, and EGR valve? The main relay circuit (E-ECU, rack actuator relay, EGR valve) is an important function.Have an independent fuse circuit from the other electrical devices. 26 Is the main relay power supply circuit connected with the E-ECU’s power supply self-holding feature? Is the main relay’s connection in accordance with the referential electrical connection diagram? 27 Is branching of the E-ECU, rack actuator relay, and EGR valve made as closely as possible to the E-ECU’s VB terminal (E48)? (within 220mm from the VB terminal is recommended).
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Result Installation
OK/NG ( W)
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OK/NG ( mA)
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OK/NG
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OK/NG ( mA)
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OK/NG
-
OK/NG
OK/NG ( ms)
Short/ Open
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OK/NG
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OK/NG
OK/NG
OK/NG
-
OK/NG ( A)
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OK/NG
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OK/NG ( mm)
-
Remarks
E55W, E60, E80 Electronic Control System Manual
