HARNESS AS-CHASSIS 4306458 - Caterpillar

System Communication Status
Connect to the electronic service tool.Select the engine ECM.Select the "Diagnostics" tab.This feature provides a means of troubleshooting J1939 data link issues. The feature shows which modules are not responding and which data link parameters are missing. Refer to Troubleshooting, "CAN Data Link - Test" for further information.Throttle Mode Configuration
The throttle configuration screen allows the ECM to be configured with up to two channel inputs. The inputs can be a combination of three types of speed control input. The three types of speed control input are:
PWM throttle input providing a variable duty cycle input to control engine speed
Analogue throttle input providing a variable voltage signal to control engine speed
Multi Position Throttle Switch (MPTS) which uses up to four switch inputs giving a total of 16 combinations. Each switch combination can then be programmed with a desired engine speed, which can be selected by the operator.The permitted throttle combinations are shown in the following table:
Table 1
Channel 1 Channel 2
None None
PWM None
None PWM
PWM PWM
Analog None
None Analog
Analog Analog
PWM Analog
Analog PWM
MPTS None
MPTS PWM
MPTS Analog
None MPTS
PWM MPTS
Analog MPTS Note: The MPTS input can only be used on one channel.There is also the option of using an Idle Validation Switch (IVS) on the analogue throttle. This switch is used to confirm that the throttle pedal has been physically moved, before reacting to the analogue speed demand signal. The IVS and software logic is designed to protect against signal faults which could cause unintended engine speed increases.Programming each throttle input requires some technical knowledge of the throttle specification that is being used. Knowledge is required to program the specifications into the correct ECM parameter values.
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Screen 1
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Screen 2
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Screen 3
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Screen 4
Engine Operating Mode Configuration
The engine operating mode configuration feature allows the configuration of up to four separate modes that can be selected via two switch inputs.If only one mode is required, no switch inputs are required and Mode 1 will always be used.If two modes are required, one switch input can be selected to toggle between Mode 1 and Mode 2. If three or four modes are required, two switch inputs will be required. The numbers of switches are selected in the drop-down box at the top of the screen.
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Screen 1
Once the number of required modes and switches has been selected, each mode must be configured. Each mode is defined by the following selection:
Mode Number - (1-4)
Switch input 1 and 2 combinations to enable the mode
Enabled - For example, if only three modes are required then mode 4 would be set to "NO". If the switch combination was active for Mode 4, the ECM would display a fault code.
Rating number – This parameter allows any available ratings in the flash file to be selected. The specific rating information can be found in the main configuration screen under "Ratings".
Rated Speed – This parameter is configurable between defined limits in the ECM (for example – 1800 rpm to 2200 rpm).
High Idle – This parameter is configurable between 1800 rpm and 2800 rpm