MANIFOLD 1026238 - Caterpillar

Note: Two system resistors is the standard arrangement. A system resistor #4 is used only in the battery cables for the optional cold weather (four batteries) attachment. This resistor cannot be used with the standard battery cables. Therefore, values for system resistance and voltage should be for two resistors (or for three resistors, if secondary steering is available).Note: Poor connections can often be the cause of a problem in an electrical circuit. Prior to beginning this procedure, inspect the harness connectors that are involved in this circuit. Verify that the involved connections in the circuit are clean, secure, and in good condition. Check the wiring for pinch points or abrasions. Look for and repair areas that indicate wires are exposed. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing a troubleshooting procedure. Refer to Testing and Adjusting, "Electrical Connector - Inspect" section of this manual.
Table 3
Troubleshooting Test Steps Values Results
1. Identify The Active Diagnostic Trouble Code (DTC) DTC present 3035-3 DTC, proceed to Test Step 2.
3035-4 DTC, proceed to Test Step 6.
Begin 3035-3 DTC Troubleshooting HERE
2. Check The ECM Voltage Supply
A. Turn the disconnect switch to the OFF position.
B. Find and disconnect the shield resistor legs from the system until no resistors are connected to the ECM supply wire P835-GY(Grey). Turn keyswitch to ON position. Check the voltage between the ECM circuit and frame ground.
The ECM circuit supply voltage is approximately 5.0 VDC OK - Voltage is 5.0 VDC.
Proceed to Test Step 4.
NOT OK - The voltage is not approximately 5.0 VDC.
Proceed to Test Step 3.
3. Check The ECM Voltage Supply At The ECM Pin
Note: The shield resistor legs remain disconnected.
A. Remove the P835-GY from the ECM harness connector with a wire removal tool.
B. Turn Key start Switch to the ON position, insert the "spoon" type multimeter probe through the hole where the P835-GY wire was removed. Contact and measure the voltage at the ECM pin.
The voltage is approximately 5 VDC. OK - Voltage is approximately 5 VDC.
Proceed to Test Step 4.
NOT OK - The voltage is not approximately 5 VDC.
Repair: Ensure that you have the latest version of software for your specific ECM. Refer to Testing and Adjusting, "Electronic Control Module (ECM) - Flash Program" in this manual.
If the voltage at the ECM pin is not approximately 5.0 VDC, the ECM may have failed. Prior to replacing an ECM, contact your dealer Technical Communicator (TC) for possible consultation with Caterpillar. This consultation may greatly reduce repair time and expense.
If the ECM must be replaced, refer to Testing and Adjusting, "Electronic Control Module (ECM) - Replace"
Proceed to Test Step 8.
4. Check For A Short To Battery
A. Turn the disconnect switch and the key start switch to the OFF position.
B. At each resistor leg that is disconnected, measure the resistance between the battery cable and the shield wire.
Each resistance measurement between each leg and the shield wire