BRACKET AS-SUPPORT 1W4253 - Caterpillar

Illustration 11 g02315535
Typical example of the connector for the combustion air valve
(1) 5 VDC supply
(2) Sensor ground
Illustration 12 g02315536
Typical example of the connector for the inlet temperature sensor for the DPF and the ARD flame detection temperature sensor
(1) 5 VDC supply
(2) Sensor ground
Illustration 13 g02315537
Typical example of the connector for the aftertreatment identification module
(1) 5 VDC supply
(6) 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 (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 (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 (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