3512E Petroleum Engine Caterpillar

Solenoid Valve - Test

Usage:

Use this procedure to troubleshoot a problem with a solenoid valve. Also, use this procedure if one of the following diagnostic codes is active or easily repeated.

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Table 1
J1939 Code and Description	CDL Code and Description	Comments
626-5 Ether Injection Control Solenoid : Current Below Normal	2417–5 Ether Injection Control Solenoid : Current Below Normal	The code is latched. The code is logged. Ether injection is disabled.
626-6 Ether Injection Control Solenoid : Current Above Normal	2417–6 Ether Injection Control Solenoid : Current Above Normal	The code is latched. The code is logged. Ether injection is disabled.
677-5 Engine Starter Motor Relay : Current Below Normal	2727-5 Starting System #1 Relay : Current Below Normal	This code indicates that there is an electrical problem with the solenoid valve and/or circuit on the starter motor relay.
677-6 Engine Starter Motor Relay : Current Above Normal	2727-6 Starting System #1 Relay : Current Above Normal	This code indicates that there is an electrical problem with the solenoid valve and/or circuit on the starter motor relay.
2791-5 Engine Exhaust Gas Recirculation (EGR) Valve Control : Current Below Normal	3405-5 EGR Valve Control : Current Below Normal	This code indicates that there is an electrical problem with the solenoid valve and/or circuit on the NRS valve actuator.
2791-6 Engine Exhaust Gas Recirculation (EGR) Valve Control : Current Above Normal	3405-6 EGR Valve Control : Current Above Normal	This code indicates that there is an electrical problem with the solenoid valve and/or circuit on the NRS valve actuator.
2813-5 Engine Air Shutoff Command Status : Current Below Normal	3239-5 Air Shutoff Relay : Current Below Normal	This code indicates that there is an electrical problem with the solenoid valve and/or circuit for the air shutoff valve relay.
2813-6 Engine Air Shutoff Command Status : Current Above Normal	3239-6 Air Shutoff Relay : Current Above Normal	This code indicates that there is an electrical problem with the solenoid valve and/or circuit for the air shutoff valve relay.
3059-5 Engine Positive Crankcase Ventilation System Monitor : Current Below Normal	N/A	This code indicates that there is an electrical problem with the solenoid valve and/or circuit for the crankcase ventilation heater relay.
3059-6 Engine Positive Crankcase Ventilation System Monitor : Current Above Normal	N/A	This code indicates that there is an electrical problem with the solenoid valve and/or circuit for the crankcase ventilation heater relay.
3821-5 Engine Exhaust Gas Recirculation (EGR) Valve 2 Control : Current Below Normal	3406-5 EGR #2 Valve Control : Current Below Normal	This code indicates that there is an electrical problem with the solenoid valve and/or circuit on the ERV valve actuator.
3821-6 Engine Exhaust Gas Recirculation (EGR) Valve 2 Control : Current Above Normal	3406-6 EGR #2 Valve Control : Current Above Normal	This code indicates that there is an electrical problem with the solenoid valve and/or circuit on the ERV valve actuator.
4210-5 Engine Pre-lube Drive : Current Below Normal	338-5 Engine Pre-Lube Pump Relay : Current Below Normal	This code indicates that there is an electrical problem with the solenoid valve and/or circuit on the engine pre-lube pump.
4210-6 Engine Pre-lube Drive : Current Above Normal	338-6 Engine Pre-Lube Pump Relay : Current Above Normal	This code indicates that there is an electrical problem with the solenoid valve and/or circuit on the engine pre-lube pump.

The applicable Electronic Control Module (ECM) monitors the current flow through the coils of the applicable components.

The applicable ECM sets a diagnostic trouble code if the current flow through a coil is incorrect. These codes can be activated only when the applicable ECM is sending a command to the control valves. A -5 code indicates that the current flow through the circuit is low and there is an open in the circuit. A -6 code indicates that the current flow through the circuit is high and there is a short in the circuit.

Engine Exhaust Gas Recirculation (EGR) Valve Control refers to the NOx Reduction System (NRS) Valve.

Engine Exhaust Gas Recirculation (EGR) Valve 2 Control refers to the Exhaust Restriction Valve (ERV).

Electrical Checkouts on the Cat^® Electronic Technician (ET)

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Table 2
Component	Electrical Checkout
Engine Exhaust Gas Recirculation (EGR) Valve	EGR Valve Control Override
Engine Exhaust Gas Recirculation (EGR) Valve 2 Control	EGR Valve 2 Control Override
Engine Starter Motor Relay	Attempt to start the engine. once the ECM attempts to energize the solenoid, the code will become active. Refer to the application-specific schematic for the "Engine Starter Motor Relay wiring circuit."
Engine Positive Crankcase Ventilation System Monitor	Engine Crankcase Ventilation Heater Relay Status Override
Ether Solenoid	Ether Injection Override
Prelubrication System Relay	Prelubrication Relay Override

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Illustration 1	g06200301

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Table 3
Troubleshooting Test Steps	Values	Results
1. Check for Codes A. Connect Cat^® Electronic Technician (ET) to the service tool connector. B. Determine if a code is active or logged.	Codes	Result: A -5 code is active or logged. Proceed to Test Step 2. Result: A -6 code is active or logged. Proceed to Test Step 3.
2. Check the Wiring for an Open Circuit A. Verify that the harness connector is free of debris, free of corrosion and securely connected. B. Disconnect the solenoid from the harness. C. Connect a jumper wire between the terminals of the harness connector for the affected coil. The coil is replaced with a short circuit.	Create a Short	Result: A -5 code became active during the electrical checkout. The ECM did not detect the jumper wire. There is an open circuit in the wiring between the coil and the ECM connector. There may be a problem with a connector. Repair: Repair or replace the connectors or the wiring. Verify that the repair eliminated the problem. Result: A -6 code is activated during the electrical checkout. The ECM detected the jumper wire. There is a problem with the solenoid. Repair: Replace the solenoid. Verify that the repair eliminated the problem.
3. Check the Wiring for a Short Circuit A. Disconnect the solenoid from the harness.	Create an Open	Result: A -6 code became active during the electrical checkout. The ECM did not detect the open circuit. There is a short circuit in the wiring between the coil and the ECM connector. There may be a problem with a connector. Repair: Repair or replace the connectors or the wiring. Verify that the repair eliminated the problem. Result: A -5 code is activated during the electrical checkout. The ECM detected the open circuit. There is a problem with the solenoid. Repair: Replace the solenoid. Verify that the repair eliminated the problem.

If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).