Series 60 DDEC V Troubleshooting – Section 37.2 Troubleshooting Flash Code 33, PID 102/FMI 3

Section 37.2
Troubleshooting Flash Code 33, PID 102/FMI 3

This diagnostic condition is typically:‪

• Open sensor return circuit
• Sensor signal circuit is shorted to the sensor +5 volt supply

Section 37.2.1
Multiple Code Check

Perform the following steps to check for multiple codes.‪

1. Plug the diagnostic tool.
2. Turn vehicle ignition switch ON and read the active codes.
   1. If code p 102/3 and no other codes were logged, refer to "37.2.2 Sensor Check" .
   2. If any of the following codes are also present: p 73/3 or 4, p 94/3 or 4, p 100/3 or 4, p 101/3 or 4, p 110/3 or 4, p 174/3 or 4, p 175/3 or 4, refer to "79 Engine Harness" .

Section 37.2.2
Sensor Check

Perform the following steps to check the sensor.‪

1. Turn vehicle ignition OFF and disconnect the TBS/IMP Sensor connector. See Figure "Turbo Boost/Intake Manifold Pressure Sensor" .
   

   Figure 1. Turbo Boost/Intake Manifold Pressure Sensor

2. Start and run the engine at idle. Read active codes logged.
   1. If active code 102/3 and any other codes are logged, refer to "37.2.4 Check for Short to +5 Volt Line" .
   2. If active code 102/4 and any other codes except 102/3 are logged, refer to "37.2.3 Return Circuit Check" .

Section 37.2.3
Return Circuit Check

Perform the following steps to check the return circuit.‪

1. Turn ignition switch OFF.
2. Install a jumper wire between pin 1 and pin 2 of the TBS/IMP Sensor harness connector. See Figure "Turbo Boost/Intake Manifold Pressure Sensor" .
3. Disconnect the Engine Harness connector at the ECM/ECU. See Figure "ECM/ECU Engine Harness and Vehicle Interface Harness Connector" .
4. Measure resistance between sockets E-15 and E-39 on the Engine Harness connector.
   1. If resistance measurement is less than or equal to 5 Ω, .
   2. If resistance measurement is greater than 5 Ω, the return line E-15 is open. Repair the open. Refer to "37.2.5.1 Verify Repairs" .
   

   Figure 2. ECM/ECU Engine Harness and Vehicle Interface Harness Connector

5. Check terminals at the TBS/IMP Sensor connector (both sensor and harness side) for damage: bent, corroded, and unseated pins or sockets. See Figure "Turbo Boost/ Intake Manifold Pressure Sensor" .
   1. If the terminals and connectors are damaged, repair them. Refer to "37.2.5.1 Verify Repairs" .
   2. If the terminals and connectors are not damaged, replace the TBS/IMP Sensor. Refer to "37.2.5.1 Verify Repairs" .
   

   Figure 3. Turbo Boost/ Intake Manifold Pressure Sensor

Section 37.2.4
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/ECU.
3. Measure resistance between sockets E-39 and E-12 on the Engine Harness connector. See Figure "ECM/ECU Engine Harness and Vehicle Interface Harness Connector" .
   1. If measured resistance is less than or equal to 10,000 Ω, the signal line E-39 is shorted to the engine +5 volt line E-12. Repair short. Refer to "37.2.5.1 Verify Repairs" .
   2. If measured resistance is greater than 10,000 Ω, or open, refer to "37.2.5 Check for Short to Battery" .

Section 37.2.5
Check for Short to Battery

Perform the following steps to check for a short to the battery (+):‪

1. Remove both fuses to the ECM/ECU.
2. Disconnect the Vehicle Interface Harness and the Engine Harness at the ECM/ECU.
3. Measure resistance between sockets E-39 of the Engine Harness connector and V-15 on the Vehicle Interface Harness connector. See Figure "ECM/ECU Engine Harness and Vehicle Interface Harness Connector"
4. Measure resistance between socket E-39 on the Engine Harness connector Vehicle Interface Harness connector sockets V-61 and V-65.
   1. If the resistance measurement is less than or equal to 100 Ω, a short exists between sockets where the measurement was taken. Repair short and reinsert fuses, or reset breakers. Refer to "37.2.5.1 Verify Repairs" .
   2. If the resistance measurement is greater than 100 Ω, or open, go to step 5 .
5. Check terminals at the ECM/ECU Engine Harness connector (both the ECM/ECU and harness side) for damage: bent, corroded, and unseated pins or sockets.
   1. If terminals and connectors are damaged, repair both. Refer to "37.2.5.1 Verify Repairs" .
   2. If terminals and connectors are not damaged, reprogram the ECM/ECU. Refer to "37.2.5.1 Verify Repairs" .

Section 37.2.5.1
Verify Repairs

Perform the following steps to verify repairs.‪

1. Turn ignition switch OFF. Reconnect all connectors.
2. Turn ignition ON. Clear codes.
3. Start and run the engine for one minute. Stop the engine.
4. Check diagnostic tool for codes.
   1. If no codes are logged, troubleshooting is complete.
   2. If code 102/3 is not logged, and other codes are logged, refer to "18.3 First Step for Diagnosing a Fault Within the DDEC System" .
   3. If code 102/3 is logged, and other codes are logged, refer to "37.2.1 Multiple Code Check" .