Tag: Bobcat Repair

Here is the solution for how to repair Bobcat heavy duty machine P18A2 suction line heater plausibility error.

 

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Service Analyzer 91.15 for Bobcat Diagnostic Software

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Bobcat Diagnostic Tool

 

1) Overview

CODE U004357-02

 

REASON

1 Electric problem (Battery supply into the main relay, DEF pressure line heater connector)

2 Electric problem (Heater relay, Wiring harness related DEF suction line heater, DEF suction line heater)

3 Electric problem (DCU connector, DCU)

EFFECT Inducement Group2

 

2) Component Location

Urea Tank, Valve and Urea Lines is applied by Machine/Vehicle Maker

 

3) Condition for Running Diagnostic

In 10ms raster if relay load diagnostic is not disabled by calibration parameter

 

4) Condition for Setting the Fault Code

Suction line heater feedback voltage is between Low threshold and High threshold

(1000mV and 2450mV)

 

5) Condition for Clearing the Fault Code

No defect detection

 

6 Check List

1) Overview

U004375-24

1 Electric problem (Supply module connector)
2 Electric problem (Wiring harness DCU to supply module, Supply module)
3 Electric problem (DCU connector, DCU)

 

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Service Analyzer 91.15 for Bobcat Diagnostic Software

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2) Component Location

 

3) Condition for Running Diagnostic
When pump motor is normal
4) Condition for Setting the Fault Code
When the sensor value (raw duty cycle) is less than 4%
5) Condition for Clearing the Fault Code
When the sensor value (raw duty cycle) is greater than 4%
6) Check List

Step	Inspection	Standard Value	YES	NO
1	P2B8C/P2B8D is occurred on diagnostic tool?	Step 2
2	After let the machine be in safety area and turn off the key switch	Step 3
3	Check sensor connection Connection problem?	Do necessary repair	Step 4
4	Check DCU connection Connection problem?	Do necessary repair	Step 5
5	Check the DCU voltage related pin connection and harness. Pin or connection problem?	Do necessary repair	Step 6
6	Check continuity and electrical insulation Electrical problem?	Fix harness	Change SM