System Operation
The ECM has four available outputs that indicate engine operating status: RUN, CRANK TERMINATE, ENGINE WARNING, and ENGINE SHUTDOWN.
They can be used to drive indicator lamps or to interface with other controls. Each output provides a 0.3 Amp maximum current connection to -Battery when ON, and an open circuit when OFF.
Note: These outputs do not provide sufficient current to drive standard incandescent indicator lamps.
Replace indicators with those specified in the Electrical System Schematic.
The RUN output signals that the engine is in the RUN state, either running or about to start. A short to +Battery or excessive electrical current on this output will result in a diagnostic code.
The CRANK TERMINATE output indicates the engine is operating above the preset engine speed required to disengage the starter. A short to +Battery or excessive electrical current on this output will result in a diagnostic code.
The ENGINE SHUTDOWN output indicates that a potentially engine damaging condition was detected by the ECM and the engine was shut down. There are no diagnostic codes associated with an electrical problem on this output.
The ENGINE WARNING output indicates the ECM detected an electrical problem in one of it’s inputs or outputs. There are no diagnostic codes associated with an electrical problem on this output.
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Diagnostic codes
CID-FMI Conditions which generate this code: Systems Response: Troubleshooting 443-03 Crank Terminate Relay Shorted High
The ECM detects excessive CRANK TERMINATE output current, indicating a short to +Battery.
Note: This code does not occur when the output is OFF.
The ECM will limit fault current to.3 Amps and the status display will not be correct.
Proceed with P-517: ECM Status Indicator Output Circuit Test
445-03 Engine Run Relay Driver Shorted High The ECM detects excessive RUN output current, indicating a short to +Battery.
Note: This code does not occur when the output is OFF.
The ECM will limit fault current to.3 Amps and the indicator status will not be correct.
Proceed with P-517: ECM Status Indicator Output Circuit Test
323-03 Engine Shutdown Lamp Driver Shorted High
The ECM detects excessive ENGINE SHUTDOWN LAMP output current, indicating a short to +Battery.
Note: This code does not occur when the output is OFF.
The ECM will limit fault current to.3 Amps and the status display will not be correct.
Proceed with P-517: ECM Status Indicator Output Circuit Test
324-03 Engine Warning Lamp Driver Shorted High
The ECM detects excessive ENGINE WARNING LAMP output current, indicating a short to +Battery.
Note: This code does not occur when the output is OFF.
The ECM will limit fault current to.3 Amps and the status display will not be correct.
Proceed with P-517: ECM Status Indicator Output Circuit Test
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Functional test
TEST STEP RESULT DIAGNOSIS/ACTION
Step 1: Inspect Electrical Connectors And Wiring
• Check and replace any burned out engine status indicator lamps (if equipped).
Note: These outputs do not provide sufficient current to drive standard incandescent indicator lamps. Replace indicators with those specified in the Electrical System Schematic.
• Check equipment wiring to determine if engine status indicators (RUN, CRANK TERMINATE, ENGINE SHUTDOWN, ENGINE WARNING) are present and directly controlled by the ECM status indicator circuit (P2 pins 28, 29, 30, and 31). Some indicator panels may obtain engine status over a data link. If status indicators are not directly controlled by the ECM, stop this test.
• Thoroughly inspect ECM Connector J2/P2 and the RUN, CRANK TERMINATE, ENGINE SHUTDOWN, and ENGINE WARNING indicator circuit wiring and connectors. Refer Inspecting Electrical Connectors for details.
• Perform 45 N (10 pound) pull test on each of the wires associated with the status indicator circuit. Refer to the schematic.
• Check ECM Connector (Allen screw) for proper torque - 6.0 N·m (4.4 lb-ft).
• Check the harness and wiring for abrasion and pinch points from the status indicators back to the ECM.
See Figure P-517.1.
See Figure P-517.2.
All connectors/pins/sockets should be completely mated/inserted, and the harness/wiring should be free of corrosion, abrasion or pinch points.
OK ⇒ Proceed to next step.
NOT OK ⇒ Repair or replace the harness as necessary.
STOP.
STOP TEST ⇒ STOP.
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4016-E61TRS Diagnostic Manual, May 2000 111
A
P517.2ECM Connector terminal locations
Wire Side Terminal Side
ECM Connector P2
58
Function Pin Location
TEST STEP RESULT DIAGNOSIS/ACTION
Step 2: Check For Active Status Indicator Diagnostic codes
• Connect Service Tool TIPPS at the Service Tool Connector.
• Attempt to start the engine while viewing the status indicators.
• Check for Active diagnostic codes.
Diagnostic codes 323-03, 324-03, 443-03, or 445-03 should NOT be active.
OK ⇒ Proceed to next step.
NOT OK ⇒ Proceed to Step 4.
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Step 3: Check For Proper Engine Status Indicators Operation
• Attempt to start the engine and determine if the RUN and CRANK TERMINATE indicators function properly (if not already done). Operate the engine under low load.
• Disconnect the Inlet Manifold Temperature Sensor connector to create an Active Diagnostic Code and observe the engine status indicators.
• Disconnect the Filtered Oil Pressure Sensor to shut down the engine and observe the engine status indicators.
The RUN indicator (if equipped) should activate when the Engine Control Switch is turned to the START or AUTO position.
The CRANK TERMINATE indicator (if equipped) should activate when the engine has started.
The ENGINE WARNING indicator (if equipped) should activate after the Inlet Manifold Temperature Sensor is disconnected.
The ENGINE SHUTDOWN indicator (if equipped) should activate after the Filtered Oil Pressure Sensor is disconnected.
OK ⇒ The status indicators are working correctly. STOP.
NOT OK ⇒ Proceed to Step 5.
Step 4: Check Indicator For Shorts
• Disconnect the suspect CRANK TERMINATE, RUN, ENGINE WARNING, or ENGINE SHUTDOWN indicator control wire at the electrical indicator (i.e., lamp or PLC input).
• Attempt to start the engine while viewing the status indicators.
• Check for Active diagnostic codes.
Diagnostic codes 323-03, 324-03, 443-03, or 445-03 should NOT be active.
OK ⇒ The short to +Battery is no longer present Repair or replace ECM driven indicator as necessary.
STOP.
NOT OK ⇒ Proceed to Step 6.
Step 5: Check Indicator Circuit Using A Jumper Wire
• Turn the Engine Control Switch to the OFF position.
• Disconnect ECM Connector J2/P2.
• Turn the Engine Control Switch to the STOP position.
• Observe the Engine Status Indicators while using a jumper wire with Deutsch Pins crimped on each end to connect between:
• P2 pin-23 and P2 pin-28 (RUN)
• P2 pin-23 and P2 pin-29 (CRANK TERMINATE)
• P2 pin-23 and P2 pin-30 (ENGINE SHUTDOWN)
• P2 pin-23 and P2 pin-31 (ENGINE WARNING)
Each lamp should illuminate only when the appropriate jumper is inserted at the ECM Connector P2.
OK ⇒ The harness and indicators check OK.
Reconnect all connectors and recheck ECM indicator operation. If the problem still exists, replace the ECM. STOP.
NOT OK ⇒ There is a problem in the indicator circuit. Recheck electrical connections, wiring, etc., for damage, corrosion, or abrasion.
Repair as required.
STOP.
TEST STEP RESULT DIAGNOSIS/ACTION
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Step 6: Check For Shorts In The Harness
• Use a wire removal tool to disconnect the suspect CRANK TERMINATE, RUN, ENGINE WARNING, or ENGINE SHUTDOWN indicator control wire from the ECM connector.
• Attempt to start the engine while viewing the status indicators.
• Check for Active diagnostic codes.
See Figure P-517.2.
Diagnostic codes 323-03, 324-03, 443-03, or 445-03 should NOT be active.
OK ⇒ The short to +Battery is in the harness.
NOT OK ⇒ The short circuit diagnostic code is present when the circuit is disconnected from the ECM. Disconnect J2/P2 and check for damage or corrosion. Refer to Inspecting Electrical Connectors. If the problem is not resolved, replace the ECM. STOP.
TEST STEP RESULT DIAGNOSIS/ACTION
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