1. First EACEFE meeting-2017
Ran Chen
2017/4/21

2. Agenda Work performance at 2016 Key work at 2017
Need support from other entities
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3. Work performance at 2016 CE responsibility Performance
Solution of CAN IC brunt issue
FC1117 troubleshooting
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4. Work performance at 2016 1. CE responsibility TOOLS TEAM SUPPORT
Category
responsibility
Tools
Calterm/CUTY/ETD/CTAS/LCT/C2ST
CSH/ICD/TABs
MFG
CM1880
CM1881
NS6
Harness
Testing
CM1881/Ampere Parametric/Loopback tester
ECM TEAM SUPPORT
Category
responsibility
CM2880
Warranty return analysis
On-site troubleshooting
CM2220 /CM2350
troubleshooting
Engineering support to JV
CM1880
SENSOR TEAM SUPPORT
Category
responsibility
Product
Sensor technology support to JV
Domestic sensor production
CPES
Troubleshooting
DMM TEST
Provide the ESW standard
Warranty returns analysis
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5. Solution of CAN IC burnt issue
Work performance at 2016
Solution of CAN IC burnt issue
Background
Item
Date
Location
S/N
ESN
VIN
ECM Failure Mode
Resistance of ECM CAN to GND 1
2015/10/29
BFDA-2
FT014565
Engine CANH Failure
Resistance of CANH to GND is 2.5Ω 2
2015/11/17 FT
OEM CANH Failure
Resistance of CANH to GND is 400Ω 3
2015/11/24
FR016092 4
2015/12/26
FH602044
Resistance of CANH to GND is 13.5KΩ 5
2015/12/28
FT017883
Instable CAN connection by CALTERM tool
Resistance of CANH/L to GND is Normal 6
2016/1/16
GL600055
OEM CANL Failure
Resistance of CANL to GND is 8.2KΩ 7
2016/1/20
GR001130
Resistance of CANH to GND is 1.3Ω
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6. Solution of CAN IC burnt issue
Work performance at 2016
Solution of CAN IC burnt issue
Investigation
The conclusion from IC supplier:
On-site troubleshooting and ESD test in plant:
In-conductive paint coating。
Walking body voltage at paint coating area： ~1200V V (Spec: <1000V)
Electrical field strength of working clothes in used states are the max 15KV observed (Spec: E < 10K V/m).
Capture the waveform voltage from the failure truck.
The peak voltage
Conclusion: replaced IC TLE6250 to TJA Improved IC robustness. When finished the model roll, No customer complaint from BFDA plant.

7. Work performance at 2016 FC1117 troubleshooting Background
Checked 168 GTL trucks vehicle speed& engine speed with FC1117.
When FC1117 came out, 4/5 trucks’ engine speed is 0 rpm, other 1/5 trucks’ engine speed is below 800rpm
Investigation result
The driver said most of GTL truck has added this main gate by themselves.
We checked the another GTL truck that day in service station, they also added this main gate.
Some driver added some other electronic equipment from battery for different use, this may add FC1117 recurrence risk.
The right battery corroded.
The wires installed at Battery + and – without authorization.
Conclusion： Driver bad behavior(esp shut off without key off or doesn’t wait 100s before disconnect the battery)

8. Work important point at 2017
ECM service troubleshooting training.
NOx sensor service troubleshooting training.
NOx sensor design improvement.
Lead free work
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9. ECM service troubleshooting training
Key work at 2017
ECM service troubleshooting training
Background:
Between Jan 2016 to Dec 2016, CE received 383 modules from BFCEC;
80% of returns analysis results are NTF;

10. ECM service troubleshooting training
Key work at 2017
ECM service troubleshooting training
Training plan:
CE ECM CPES team wrote a service troubleshooting guideline, push service stations to do the service work follow up the guideline to reduce the NTF rate.

11. NOx sensor service troubleshooting training
Key work at 2017
NOx sensor service troubleshooting training
Background:
Problem Identification: about 50% NOx sensor return from DFCV and DCEC service station after analysis was TNF ,the resource fault code distribution show as below:
Analysis:
Spec not match between Conti and Cummins 大陆电子产品和康明斯的技术要求不匹配
Technical 技术问题
TNF
Not fully correct 指导书不正确
System 系统问题
Service guide line 服务指导书问题
Can not cover all sides
指导书不完善
Service station do not follow the guide line 服务站未按照服务指导书操作

12. NOx sensor service troubleshooting training
Key work at 2017
NOx sensor service troubleshooting training
Training plan :

13. NOx sensor design improvement
Key work at 2017
NOx sensor design improvement
Background:
For BFDA, there are 1769 pcs water ingress failure form 01/2015 to 05/2016.
Failure rate on Round EGP is about 68.4%, while Square EGP is about 11.1%.
About 35% vehicle, failure occurrence is twice or more.
Air tight test on the harness branch point.

14. NOx sensor design improvement
Key work at 2017
NOx sensor design improvement
CAN network layout diagram
Vehicle wiring harness have branch point and exposed to outdoor：
Design improve methods:
Push customer’s wire harness supplier to improve the sealing performance.
Used bilateral heat shrinkable tube replace Unilateral heat shrinkable tube.
2. Cancel the branch point on the wire harness. Put 120ohm resistor in NOx sensor’s PCB. Reduce the water ingress risk.
Together with Conti engineering team to evaluate the feasibility of this NOx sensor engineering change plan.

15. Components lead free work
Key work at 2017
Components lead free work
ECM

16. Components lead free work
Key work at 2017
Components lead free work
SENSOR

17. Need support from other entities
Warranty returns/In-plant/BIS database collection（ECM/sensor）, it is help to production quality improvement.
The warranty returns of NTF to do the verification test.
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18. Thank you！
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