SPN 103 - FMI 8 (Fault Codes: Turbo Speed Sensor - Input Failure/ Code 64)

Engine Check - Code 64 (12V2000 Detroit Engine)

Figure 1.1 - Code 64 (Turbo Speed Sensor Input Failure)

#Description of Flash Code 64

Flash Code 64 is used to identify a Turbo Speed fault.

→The SAE J1587 equivalent code for Flash Code 64 is P 103/0 (Turbo Overspeed), and P 103/8 (Turbo Speed Sensor Input Failure).

→Could be a faulty Turbo Speed Sensor (if installed), or due to a wastegate line off/bypassed (if equipped), or there is a boost leak somewhere.

1). Starts the Engine, and check DDDL for codes. Read More: How to Connecting the Detroit Engines using Detroit Diesel Diagnostic Link (DDDL).

→Diagnostics - Fault Codes.

Figure 1.2 - Flash 64 (P 103/8)

2). Check Boost Pressure.

→Diagnostics - Normal/Diagnostic Instrumentation.

→Abnormal reading on Boost Pressure (31.9 Psi). Check if there is a boost leaking, or a faulty sensor.

→Turbo RPM (0 krpm), not installed.

Figure 1.3 - Boost Pressure (31.9 Psi)

#Turbo Boost Sensor

→This device is a pressure sensor that sends an electrical signal to the ECM. The ECM uses this information to compute the amount of air entering the Engine. Fuel supply is regulated by the Turbo Boost Sensor (TBS) information to control Engine smoke.

3). Replace the Sensor.

→Turbo Boost Sensor used in the Series 2000 (as Figure 1.4 below), with P/N 23524605.

Figure 1.4 - Turbo Boost Sensor

4). Monitoring on EDM display.

→Boost Pressure should be 0 Psi.

Figure 1.5 - EDM Display (Boost: 0 Psi)

→The Turbo Boost Sensor (TBS) provides data to the ECM for use in Engine fueling (smoke control).

→If no codes are logged, no further troubleshooting is required.

Figure 1.6 - Fault Codes (No Codes)

Replace the Electronic Display Module (EDM) for Detroit Engines

Fault Codes: Injector 1 Response Time Long (Code 61/ Detroit Engine)

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