33 FLASH CODE 33 - TBS HIGH

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1 33 FLASH CODE 33 - TBS HIGH Section Page 33.1 DESCRIPTION OF FLASH CODE SAE J1587 EQUIVALENT CODE FOR FLASH CODE TROUBLESHOOTING FLASH CODE

2 Figure 33-1 Turbo Boost Sensor Figure 33-2 Turbo Boost Sensor 2003 Engines (Rev. 2/03) All information subject to change without notice From Bulletin 1-SECM-03 6SE Copyright 2003 DETROIT DIESEL CORPORATION

3 DDEC III/IV SINGLE ECM TROUBLESHOOTING GUIDE 33.1 DESCRIPTION OF FLASH CODE 33 Flash Code 33 indicates that the engine Turbo Boost Sensor (TBS), see Figure 33-1 and see Figure 33-2, input to the ECM has exceeded 95% (normally > 4.75 volts) of the sensor supply voltage. This diagnostic condition is typically: Open sensor return circuit Sensor signal circuit is shorted to the sensor +5 volt supply 33.2 SAE J1587 EQUIVALENT CODE FOR FLASH CODE 33 The SAE J1587 equivalent code for Flash Code 33 is p 102/S3. All information subject to change without notice. (Rev. 2/03) 6SE Copyright 2003 DETROIT DIESEL CORPORATION From Bulletin 1-SECM

4 33.3 TROUBLESHOOTING FLASH CODE TROUBLESHOOTING FLASH CODE 33 The following procedure will troubleshoot Flash Code Multiple Code Check Perform the following steps to check for multiple codes. 1. Plug the diagnostic data reader (DDR) into the diagnostic data link (DDL). 2. Turn vehicle ignition switch ON. 3. Read active codes. [a] If code 102/3 and no other codes were logged, refer to section [b] If any of the following codes are also present: 72/3 or 4, 73/3 or 4, 94/3 or 4, 100/3 or 4, 101/3 or 4, 110/3 or 4, 174/3 or 4, 175/3 or 4, refer to section (Rev. 2/03) All information subject to change without notice From Bulletin 1-SECM-03 6SE Copyright 2003 DETROIT DIESEL CORPORATION

5 DDEC III/IV SINGLE ECM TROUBLESHOOTING GUIDE Sensor Check Perform the following steps to check the sensor. 1. Turn vehicle ignition OFF. 2. Disconnect the TBS connector. See Figure Start and run the engine at idle. 4. Read active codes logged. [a] If active code 102/3 and any other codes are logged, refer to section [b] If active code 102/4 and any other codes except 102/3 are logged, refer to section Figure 33-3 Turbo Boost Sensor Return Circuit Check Perform the following steps to check the return circuit. 1. Turn ignition switch OFF. 2. Install a jumper wire between pin A and pin B of the TBS harness connector. See Figure Disconnect the engine harness connector at the ECM. See Figure Measure resistance between sockets P1 and Y2 on the engine harness connector. [a] If resistance measurement is less than or equal to 5, refer to section All information subject to change without notice. (Rev. 2/03) 6SE Copyright 2003 DETROIT DIESEL CORPORATION From Bulletin 1-SECM

6 33.3 TROUBLESHOOTING FLASH CODE 33 [b] If resistance measurement is greater than 5, the return line #452 is open. Repair the open. Refer to section Figure 33-4 Turbo Boost Sensor Figure 33-5 ECM Engine Harness Connector (Rev. 2/03) All information subject to change without notice From Bulletin 1-SECM-03 6SE Copyright 2003 DETROIT DIESEL CORPORATION

7 DDEC III/IV SINGLE ECM TROUBLESHOOTING GUIDE Check Turbo Boost Sensor Connectors Perform the following steps to check the TBS connectors. 1. Check terminals at the TBS connector (both sensor and harness side) for damage: bent, corroded, and unseated pins or sockets. See Figure [a] If the terminals and connectors are damaged, repair them. Refer to section [b] If the terminals and connectors are not damaged, replace the TBS. Refer to section Figure 33-6 Turbo Boost Sensor All information subject to change without notice. (Rev. 2/03) 6SE Copyright 2003 DETROIT DIESEL CORPORATION From Bulletin 1-SECM

8 33.3 TROUBLESHOOTING FLASH CODE Check for Short to +5 Volt Line Perform the following steps to check for a short to the +5 volt line: 1. Turn vehicle ignition OFF. 2. Disconnect engine harness connector from the ECM. 3. Measure resistance between sockets P1 and W1 on the engine harness connector. SeeFigure33-7. [a] If measured resistance is less than or equal to 10,000, the signal line #432 is shorted to the engine +5 volt line #416. Repair short. Refer to section [b] If measured resistance is greater than 10,000, or open, refer to section Figure 33-7 ECM Engine Harness Connector (Rev. 2/03) All information subject to change without notice From Bulletin 1-SECM-03 6SE Copyright 2003 DETROIT DIESEL CORPORATION

9 DDEC III/IV SINGLE ECM TROUBLESHOOTING GUIDE Check for Short to Battery Perform the following steps to check for a short to the battery (+): 1. Remove both fuses to the ECM. 2. Disconnect the vehicle harness and 5-way power connector harness at the ECM. See Figure Measure resistance between sockets P1 of the engine harness connector and B3 on the vehicle harness connector. 4. Measure resistance between socket P1 on the engine harness connector and the 5-way power harness connector sockets A and C. [a] If the resistance measurement is less than or equal to 100, a short exists between sockets where the measurement was taken. Repair short and reinsert fuses, or reset breakers. Refer to section [b] If the resistance measurement is greater than 100, or open, refer to section Figure Way ECM Power Connector All information subject to change without notice. (Rev. 2/03) 6SE Copyright 2003 DETROIT DIESEL CORPORATION From Bulletin 1-SECM

10 33.3 TROUBLESHOOTING FLASH CODE Check ECM Connectors Perform the following steps to check the ECM connectors. 1. Check terminals at the ECM engine harness connector (both the ECM and harness side) for damage: bent, corroded, and unseated pins or sockets. [a] If terminals and connectors are damaged, repair both. Refer to section [b] If terminals and connectors are not damaged, reprogram the ECM. Refer to section Verify Repairs Perform the following steps to verify repairs. 1. Turn ignition switch OFF. 2. Reconnect all connectors. 3. Turn ignition ON. 4. Clear codes. 5. Start and run the engine for one minute. 6. Stop engine. 7. Check DDR for codes. [a] If no codes are logged, troubleshooting is complete. [b] If code 102/3 is not logged, and other codes are logged, refer to section 9.1. [c] If code 102/3 is logged, and other codes are logged, refer to section (Rev. 2/03) All information subject to change without notice From Bulletin 1-SECM-03 6SE Copyright 2003 DETROIT DIESEL CORPORATION

34 FLASH CODE 34 - TBS LOW

34 FLASH CODE 34 - TBS LOW Section Page 34.1 DESCRIPTION OF FLASH CODE 34... 34-3 34.2 SAE J1587 EQUIVALENT CODE FOR FLASH CODE 34... 34-3 34.3 TROUBLESHOOTING FLASH CODE 34... 34-4 Figure 34-1 Turbo Boost