CONTROL FUNCTIONS (CONT’D)

•APP-IP4

The accelerator position sensor input (APS: E35) and the backup analog sensor input (REAN: E37) can be flagged so that the corresponding sensor types are changed (see table below). These inputs have been flagged so that accelerator sensor signals (flag setting: 1) and foot pedal signals per SAE J1843 (flag setting: 2 - 4) can be applied.

When these inputs are open, they must be flagged to 0 to disable sensor failure detection.

ECU terminal setting flag Connection sensor type APS: E35 REAN: E37 0(Generator standard)0(Standard)No connection (failure detection disabled)

1(Standard)1Normal accelerator sensor

22 Foot pedal (SAE J1843 configuration) Analog + APP-IP2: NO & APP-IP7:NC)

33 Foot pedal (SAE J1843 configuration)

+ APP-IP2: NO pedal (SAE J1843 configuration)

44

To connect the accelerator position sensor input (APS: E35) and the backup analog sensor input (REAN: E7) to the foot pedal (flag setting: 2 - 4), APP-IP2: E14 and APP-IP7: E13 must be configured to enable reception of signals from the foot pedal switch. In addition, APP-IP2: E14 and APP-IP7: E13 must be configured to enable connection with an NO switch and NC switch respectively. Åi(Set APP-IP2 to NO and APP-IP7 to NC.

Example:

•When ECU terminal setting flag setting = 2, set APP-IP2 to NO and APP-IP7 to NC.

•When ECU terminal setting flag setting = 3, set APP-IP2 to NO.

•When ECU terminal setting flag setting = 4, set APP-IP7 to NC.

When the foot pedal connection is selected, it’s recommended that you set the low idling voltage and the high idling voltage of ASP terminal and REAN terminal to 1.0 V and 3.5 V.

CONTROL FUNCTIONS (CONT’D)

[Figure 10-40-24] shows the foot pedal operation and engine speed. When the flag is set to 2, the input voltage at APS terminal or REAN terminal is effective only when APP-IP2: NO is low and APP-IP7: NC is high. Otherwise, the engine runs at the voltage input of 0.83 V (when the recommended setting is selected, the engine runs at the low idling speed).

When the flag is set to 3, the input voltage at APS terminal or REAN terminal is effective only when APP-IP2: NO is low. Otherwise, the engine runs at the voltage input of 0.83 V (when the recommended setting is selected, the engine runs at the low idling speed).

When the flag is set to 4, the input voltage at APS terminal or REAN terminal is effective only when APP-IP7: NC is high. Otherwise, the engine runs at the voltage input of 0.83 V (when the recommended setting is selected, the engine runs at the low idling speed).

When 2 foot pedals are connected, it’s necessary to set that APS and REAN donít require the same foot pedal switch.

Example:

•APS: E35 for 3 (APP-IP2 pedal switch), REAN: E37 for 4 (APP-IP7 pedal switch).

•APS: E35 for 4 (APP-IP7 pedal switch), REAN: E37 for 3 (APP-IP2 pedal switch).

Note: Logic fixation in APP-IP2=NO, APP-IP7=NC

CONTROL FUNCTIONS (CONT’D)

Application Interface Outline (Cont’d)

[Figure 10-40-25] shows the foot pedal failure detection scheme. When either of the following is approved, the sensor fails.

The E-ECU has an error of ±0.125 V for the following detection voltage.Therefore, be noted that the pedal switch must switch in between 0.775 V and 0.975 V.

The operation while the sensor failure is in detection is same as the normal accelerator sensor.

When the foot pedal is selected, interrupting the E-ECU power supply by turning off the key switch is required to meet the cancellation condition of sensor failure.In case of the normal acceleration sensor, the sensor failure is automatically cancelled when the sensor signal is returned to normal.

•As in the case of the acceleration sensor, when the input voltage reaches below 0.2V or above 4.6 V, the sensor failure is detected

•When APP-IP2: NO becomes high or APP-IP7: NC becomes low and the input voltage is above 1.1 V, the sensor failure is detected.(depending on the status of the active switch when the flag is set to 3 or 4).

•When APP-IP2: NO becomes low or APP-IP7: NC becomes high and the input voltage is above 0.65 V, the sensor failure is detected.(depending on the status of the active switch when the flag is set to 3 or 4).

CONTROL FUNCTIONS (CONT’D)

Application Interface Outline (Cont’d)

Starting aid

Using a standard starting aid relay allows the starting aid (air heater or glow plug) to be controlled as follows. The starting aid relay permits the E-ECU to check for disconnection or short-circuit. (Standard)

•ON-glow control (standard feature)

When the key switch is moved to the "ON" position, the starting aid relay is automatically energized for a duration that depends on the coolant temperature. The preheat lamp can be on during energization. (The same feature as QHS controller 129457-77900. QGS controller 119650-77900 has a two-stage temperature control feature). The preheat time for ON-glow control differs for an air heater and a glow plug used as the starting aid [Figure 1040-26]

•Simultaneous energization (standard feature)

This feature allows energizing the starting aid relay while energizing the starter when the key switch is in the START position, facilitating cold start. (This feature is the same as provided by QHS controller 129457-77900 and QGS controller 119650-77900).

When the voltage at the power supply terminal of the E-ECU decreases to 6.5 V, the starting aid relay is deenergized to prevent the E-ECU from being reset due to "supply voltage low" (the E-ECU is reset when the supply voltage lowers to 6.0 V).

For reduction of the battery power consumption and voltage drop control of the starter in use, it’s possible to make the starting aid relay de-energized, but in this case the cold start check with installation of the engine on a machine is requested.

•After heating (optional feature)

This feature allows the starting aid relay to be energized for 80 seconds after engine start or as long as the coolant temperature is lower than 10½C, thereby reducing the time required for self-extinguishing of blue and white smoke. (This feature is the same as provided by QHS controller 129457-77900 except for temperature and time settings. QGS controller 119650-77900 has no after glow feature).

The after heating feature is disabled by default to avoid a heavy burden on the battery. Use this feature in due consideration to the battery charging/discharging cycle.

NOTE:When the key switch with a ìglowî position is used in the standard connection diagram, preheat lamp is illuminated for a duration that depends on the coolant temperature, and the starting aid is automatically energized at the same time. However, when the key switch is moved from the OFF position to the ON position to start the engine after the completion of preheat, preheat lamp is illuminated again. Be noted that it’s not necessary to preheat again at this time.