0432266 JOHNSON COVER AY,MOTOR-UPR

Table 1
J1939 Code and Description Comments
632-5
Engine Fuel Shutoff Valve #1 : Current Below Normal This code indicates that there is a problem with the engine gas shutoff valve relay and/or electrical circuit.
632-6
Engine Fuel Shutoff Valve #1 : Current Above Normal This code indicates that there is a problem with the engine gas shutoff valve relay and/or electrical circuit.
677–5
Engine Starter Motor Relay : Current Below Normal This code indicates that there is a problem with the starter motor relay and/or electrical circuit .
677–6
Engine Starter Motor Relay : Current Above Normal This code indicates that there is a problem with the starter motor relay and/or electrical circuit .
1387-5
Auxiliary Pressure #1 : Current Below Normal This code indicates there is a problem with the auxiliary pressure sensor and/or sensor wiring circuit
1387-6
Auxiliary Pressure #1 : Current Above Normal This code indicates there is a problem with the auxiliary pressure sensor and/or sensor wiring circuit
2634-5
Power Relay : Current Below Normal This code indicates that there is a problem with the relay and/or electrical circuit from the ECM.
Relay powers the following:
- Fuel actuator
2634-6
Power Relay : Current Above Normal This code indicates that there is a problem with the relay and/or electrical circuit from the ECM.
Relay powers the following:
- Fuel actuator
2807–5
Engine Fuel Shutoff Valve #2 : Current Below Normal This code indicates that there is a problem with the auxiliary gas shutoff valve and/or the electrical circuit on the ECM.
2807–6
Engine Fuel Shutoff Valve #2 : Current Above Normal This code indicates that there is a problem with the auxiliary gas shutoff valve and/or the electrical circuit on the ECM. Electrical Checkouts on the Cat® Electronic Technician (ET)
Table 2
Component Electrical Checkout
Engine Starter Solenoid 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 Solenoid" wiring circuit.
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.
Fuel Actuator Power Supply Relay Turn main disconnect switch to the "ON" position.
Gas Shutoff Valve #1 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 gas shut-off valve or GSOV circuit.
Gas Shutoff Valve #2 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 gas shut-off valve or GSOV circuit.
Auxiliary Pressure Sensor Turn key switch to the "ON" position.
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 or relay 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 or relay.
Verify that the repair eliminated the problem.
3. Check the Wiring for a Short Circuit
A. Disconnect the solenoid or relay from the harness.
Create an Open
Result: A -6 code remained 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 or relay.
Repair: Replace the solenoid or relay.
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).