Improvements for SCR Inlet Temperature Sensor Wiring Routing on Certain C9.3 Engines {1906, 1921, 1922, 1928, 1929, 3290, 7344}
- Industrial Engine
- C9.3 (S/N: CS91-UP)
Description Of Change: The improved CEM wiring routing addresses the erratic SCR inlet temperature sensor signals to resolve the 3105-3 and 3105-4 faults intermittently tripping due to electromagnetic field interference from spark plug wire.
Adaptable To: The 373-5283 Temperature Sensor Gp is intermittently tripping a 3105-3 or 3105-4 fault code error due to current wiring routing. Electromagnetic field interference from spark plug wire in proximity with SCR temperature sensor box is causing erratic temperature reading and high-voltage codes to trip. Table 1 contains the part numbers needed to move the harness.
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| Qty | Part Number | Part Description |
|---|---|---|
| 1 | Cable Strap | |
| 4 | Cable Straps |
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| Effective Serial Number |
|---|
| S/N:CS901233-UP |
Rework Instructions
- Remove zip ties from current wiring shown above to reroute wiring harness correctly.
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Illustration 2 g06103768 - Place 3S-2093 Small Cable Strap to main harness and spark plug wire after the wire is moved to top of main harness. Use 7K-1181 Cable Strap to mount temperature sensor connector to ladder clip as shown in Illustration 2.
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Illustration 3 g06103774 - Install 7K-1181 Cable Strap to spark plug wire, main harness, coil pig tail wire, temp sensor wire, and ground wire to outer rings of ladder clip as shown in Illustration 3.
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Illustration 4 g06103778 - Route spark plug wire on outside of main harness as shown in Illustration 4.
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Illustration 5 g06103782 - Reroute coil wire (black) without looping around the clip as done previously and use 7K-1181 Cable Strap to mount with main harness to ladder clip as shown in Illustration 5.
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| |
| Illustration 1 | g06103738 |
|
Zip ties | |
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