The Compressor By-Pass Valve Actuator Might Fail On Certain G3500B Engines {1803, 5510, 7602, 7610, 7620} Caterpillar

Gas Engine

G3508B (S/N: N8C1-UP; RBK1400-UP)

G3512B (S/N: JHH1028-UP; N2S1-UP)

G3516B (S/N: N6E1-UP; JEF2661-UP)

Industrial Engine

G3520B (S/N: GLF108-UP)

Petroleum Engine

G3520B PETROLEUM (S/N: TPC1140-UP)

Problem

The EEPROM chip within the compressor by-pass valve actuator fails resulting in the valve not functioning and a 1720-12 Turbocharger Compressor Bypass Valve Actuator : Failure code.

Note: Product Link can get information from the CDL or CAN, unplugging the two CAN wires will not effect or change the Product Link functionality.

Solution

Perform this procedure before failure to eliminate failure mode of the actuator valve.

Note: Only replace the actuator valve if failed and the 1720-12 Turbocharger Compressor Bypass Valve Actuator : Failure is present.

Parts Required

Procedure

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Illustration 1	g06058679
(1) 417-4722 Communication Electronics Gp or 459-0786 Communication Electronics Gp

1. Locate either of the Communication Electronics Groups (1).
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   Illustration 2	g06058696
   (2) 7K-1181 Cable Straps

2. Cut cable straps (2) from the connector for the wiring harness.
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   Illustration 3	g06058757
   (3) 126-1774 Connector Cover

3. Remove connector cover (3) with a flat blade screw driver.
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   Illustration 4	g06058762
   (4) 151-6320 Wire Removal Tool

4. Use wire removal tool (4) to remove pins (34) and (50) from the 70-pin connector.
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   Illustration 5	g06058771
   (5) 8T-8737 Seal Plugs

5. Install seal plugs (5) in the 70-pin connector where the wires were removed from.
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   Illustration 6	g06058792
   (6) Pin 34 (7) Pin 50 (8) 155-2270 Connecting Plug Kit

6. Install pin 34 (6) and pin 50 (7) into connecting plug kit (8).
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   Illustration 7	g06058797
   (9) 374-7463 Seal Cap (10) 3S-2093 Cable Strap

7. Install seal cap (9) onto the previously installed connecting plug kit. Secure the wires back to the main wiring harness using cable strap (10).
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   Illustration 8	g06058807
   (2) 7K-1181 Cable Straps (3) 126-1774 Connector Cover

8. Reinstall connector cover (3). Secure the wiring harness back to the connecting cover using cable straps (3).