Series 60 DDEC V Troubleshooting

Section 34.3 Troubleshooting Flash Code 29, PID 404/FMI 4

Section 34.3
Troubleshooting Flash Code 29, PID 404/FMI 4

The SAE J1587 equivalent code for Flash Code 29 is p 404/4, turbo compressor outlet (TCO) low voltage. Flash Code 29 p 404/4 indicates the signal voltage for the Turbo Compressor Outlet Temperature Sensor went below calibration limits.‪

See Figure "TCO Connector and Turbo Compressor Temperature Out Sensor" for the TCO Connector and sensor.‪

Click to see this graphic in a separate window

Figure 1. TCO Connector and Turbo Compressor Temperature Out Sensor

Section 34.3.1
Check for Short

Perform the following steps to check the Turbo Compressor Temperature Out Sensor connector. ‪

  1. Unplug Turbo Compressor Temperature Out Sensor connector.
  2. Measure resistance between cavity 1 and cavity 2 of connector.
    1. If measured resistance is greater than 5 Ω, refer to "34.3.2 Check for Failed Resistor" .
    2. If measured resistance is less than 5 Ω, E-22 is shorted to E-14. Repair the short. Refer to "34.3.2.1 Verify Repairs" .

Section 34.3.2
Check for Failed Resistor

Perform the following steps to check for failed resistor:‪

  1. Unplug the Engine Harness. Measure resistance between cavity E-22 and E-14. See Figure "Turbo Compressor Outlet Temperature Sensor Circuit" .
    Click to see this graphic in a separate window

    Figure 2. Turbo Compressor Outlet Temperature Sensor Circuit

    1. If resistance is less than 1.0 K Ω, wire E-14 is shorted to E-22. Repair and refer to "34.3.2.1 Verify Repairs" .
    2. If resistance is greater than 1.1 K Ω, go to step 2 .
  2. Check for corrosion at the 2–pin and 68–pin connector.
    1. If corroded, clean corrosion from the terminals or replace the terminals. Refer to "34.3.2.1 Verify Repairs" .
    2. If terminals are clean, without corrosion, replace the Turbo Compressor Temperature Out Sensor. Refer to "34.3.2.1 Verify Repairs" .
Section 34.3.2.1
Verify Repairs

Perform the following steps to verify repairs.‪

  1. Turn ignition OFF. Reconnect all connectors. Turn ignition ON.
  2. Clear codes, start and run the engine for eight minutes. Stop the engine.
  3. Read the inactive codes.
    1. If no codes are displayed, troubleshooting is complete.
    2. If code p 404/4 is logged with any other codes, review this section from the first step to find the error.
    3. If code p 404/4 is not logged, but other codes are logged, refer to "18.3 First Step for Diagnosing a Fault Within the DDEC System" .


Series 60 DDEC V Troubleshooting Guide - 6SE570
Generated on 10-13-2008

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