FRAME AS 3843568 - Caterpillar

Illustration 8 g02315534
Typical example of the connector for the NRS valve
(1) 5 VDC supply
(2) Sensor ground
Illustration 9 g02315537
Typical example of the connector for the aftertreatment identification module
(1) 5 VDC supply
(6) Ground
Illustration 10 g03130436
Typical example of the connector for the Exhaust Back Pressure Regulator (EBPR)
(1) 5 VDC supply
(2) GroundComplete the procedure in the order in which the steps are listed.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Connector Damage
A. Turn the keyswitch to the OFF position.
B. Check the connectors and the harness for the following faults:
Damage
Abrasion
Corrosion
Incorrect attachment
C. Refer to Troubleshooting, "Electrical Connectors - Inspect".
D. Perform a 45 N (10 lb) pull test on each of the wires in the harness that are associated with the throttle position sensors. Check the wire connectors for all the sensors on the sensor supply circuits.
E. Check the screws for the ECM connectors for the correct torque of 6 N m (53 lb in).
Connector fault
Result: Found damage, abrasion, corrosion, or incorrect attachment.
Repair: Repair the connectors or the harness and/or replace the connectors or the harness.
Use the electronic service tool to clear all logged diagnostic codes and then verify that the repair eliminates the fault.
Result: No faults found.
Proceed to Test Step 2.
2. Check for Active Diagnostic Codes
A. Connect the electronic service tool to the diagnostic connector.
B. Turn the keyswitch to the ON position.
C. Use the electronic service tool to monitor the diagnostic codes. Wait at least 15 seconds in order for the diagnostic codes to become active. Check and record any active diagnostic codes.
Diagnostic codes
Result: One or more of the diagnostic codes listed in Table 1 is active or recently logged.
Proceed to Test Step 3.
Result: None of the previous diagnostic codes are active.
The fault may be intermittent. Proceed to Test Step 7.
3. Disconnect the Sensors One at a Time
A. Turn the keyswitch to the OFF position.
B. For a 3509-X or 262-X diagnostic code, disconnect the sensors on the 5 VDC supply circuit on the J2/P2 connector one at a time. Refer to Illustration 2. Wait for 30 seconds after each sensor is disconnected. Use the electronic service tool to monitor the diagnostic codes.
For a 3510-X or 2131-X diagnostic code, disconnect the analog throttle position sensors (if equipped) one at a time. Also, disconnect the aftertreatment ID module and any other sensors that are connected to the 5 VDC supply on the P1 connector. Refer to Illustration 1. Wait for 30 seconds after each sensor is disconnected. Use the electronic service tool to monitor the diagnostic codes.
For a 678-X or 41-X diagnostic code, disconnect the digital throttle position sensors (if equipped) one at a time. Also, disconnect any other sensors that are connected to the 8 VDC supply on the P1 connector. Refer to Illustration 3. Wait for 30 seconds after each sensor is disconnected. Use the electronic service tool to monitor the diagnostic codes.
Note: The sensor supply diagnostic will become inactive when the sensor that caused the diagnostic code is disconnected.
C. Ensure that all the sensors on the suspect sensor supply circuit are disconnected.
Diagnostic code inactive
Result: The 3509,