ECM
Start Return
Starting Motor Relay Supply+
Supply-10
20
1 2 J2 P2
Supply+
Supply-1
2 Prelubrication
Return 12 22
Prelubrication Relay
Fuel Shutoff Return
Fuel Shutoff Valve Supply+
Supply-11
21
1 2
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Diagnostic codes
CID-FMI Conditions which generate this code: Systems Response: Troubleshooting 17-05 Fuel Shutoff Valve Open Circuit
An open circuit or short to +Battery is detected while the ECM Gas Shutoff Solenoid output is OFF. An internal voltage pull-up resistor floats to +Battery when no electrical load is present, indicating an open circuit in the harness or solenoid.
Note: This code does NOT occur when the output is ON.
The engine will likely be unable to start due to the lack of fuel.
Proceed with P-513: ECM Start/Stop Output Circuit Test
17-06 Fuel Shutoff Valve Short To Ground The ECM detects excessive output current on the Gas Shutoff output. This is likely caused by a short in the harness or an internally shorted Gas Shutoff Solenoid.
Note: This code does not occur when the output is OFF.
The ECM continue to retry to energize the solenoid.
The engine will likely be unable to start due to the lack of fuel.
Proceed with P-513: ECM Start/Stop Output Circuit Test
17-12 Fuel Shutoff Valve Faulty
The Gas Shutoff Valve driver in the ECM is OFF but the engine is still running, indicating a faulty Gas Shutoff Valve or a short to +Battery.
The ECM will disable the ignition system to shut down the engine.
This diagnostic code remains Active until the Engine Control Switch is turned to the OFF position.
Proceed with P-513: ECM Start/Stop Output Circuit Test
338-05 Prelubrication Output Open
An open circuit or short to +Battery is detected while the ECM Prelubrication output is OFF. An internal voltage pull-up resistor floats to +Battery when no electrical load is present, indicating an open circuit in the harness or solenoid.
Note: This code does NOT occur when the output is ON.
The engine will likely be without prelubrication.
Proceed with P-513: ECM Start/Stop Output Circuit Test
338-06 Prelubrication Output Short To Ground The ECM detects excessive output current on the Prelubrication output, indicating a possible short to -Battery.
Note: This code does NOT occur when the output is OFF.
The engine will likely be without prelubrication.
Proceed with P-513: ECM Start/Stop Output Circuit Test
444-05 Starter Motor Relay Open Circuit An open circuit or short to +Battery is detected while the ECM Start output is OFF.
An internal voltage pull-up resistor floats to +Battery when no electrical load is present, indicating an open circuit in the harness or solenoid.
Note: This code does NOT occur when the output is ON.
The engine will likely be unable to crank.
Proceed with P-513: ECM Start/Stop Output Circuit Test
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Functional test
444-06 Starter Motor Relay Shorted Low
The ECM detects excessive output current on the Start output, indicating a possible short to -Battery.
Note: This code does NOT occur when the output is OFF.
The engine will likely be unable to crank.
Proceed with P-513: ECM Start/Stop Output Circuit Test
CID-FMI Conditions which generate this code: Systems Response: Troubleshooting
TEST STEP RESULT DIAGNOSIS/ACTION
Step 1: Inspect Electrical Connectors And Wiring
• Thoroughly inspect ECM Connector J2/P2, the Starting Motor Relay, Prelubrication Relay, and Fuel Shutoff Valve harness connections. Refer Inspecting Electrical
Connectors for details.
• Perform 45 N (10 pound) pull test on each of the wires associated with the Start/Stop 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 Starting Motor Relay, Prelubrication Relay, and Fuel Shutoff Valve to the ECM.
See Figure P-513.1.
See Figure P-513.2.
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.
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A
P513.2ECM Connector terminal locations
Wire Side Terminal Side
ECM Connector P2
58
Function Pin Location
TEST STEP RESULT DIAGNOSIS/ACTION
Step 2: Check For An Open Circuit Diagnostic Code
• Connect TIPPS at the Service Tool Connector.
• Turn the Engine Control Switch to the STOP position.
Wait at least 10 seconds for codes to become Active.
• Check for an Active 17-05, 338-05, or 444-05 diagnostic code on the TIPPS Active Diagnostic Code screen.
Start/Stop Open Circuit Diagnostic codes should NOT be active.
OK ⇒ Proceed to next step.
NOT OK ⇒ Proceed to Step 4.
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Step 3: Check For A Short To Ground Diagnostic Code
• Attempt to start the engine. Allow the engine to complete a complete cranking cycle.
• Check for an Active 17-06, 338-06, or 444-06 diagnostic code.
• If the engine starts, turn the Engine Control Switch to the STOP position.
• Check for an Active 17-12 diagnostic code.
Diagnostic codes 17-06, 338-06, or 444-06 and 17-12 should NOT be Active.
OK ⇒ The Start/Stop output circuits are functioning properly. Refer to Inspecting Electrical Connectors if troubleshooting an intermittent problem.
STOP.
NOT OK ⇒ Diagnostic code 17-06, 338-06, or 444-06 is Active indicating a short circuit. Proceed to Step 5.
17-12 ACTIVE ⇒ The ECM has turned the Fuel Valve OFF but the engine continued to run (ignition is then disabled to shut down the engine).
Replace the Fuel Shutoff Solenoid. STOP.
Step 4: Check Harness For A Short To +Battery
• Turn the Engine Control Switch to the STOP position, if not already done.
• Determine if the suspect relay or solenoid is energized.
The ECM Start/Stop Outputs should be OFF when the Engine Control Switch is in the STOP position.
OK ⇒ There are no shorts to +Battery. Proceed to Step 6.
NOT OK ⇒ Disconnecting the suspect relay or solenoid creates an audible click, there is a short to +Battery or the ECM has a faulty driver. Use a wire removal tool to remove the suspect output wire from ECM connector P2.
If the solenoid or relay is still energized, there is a short to +Battery in the harness. Repair as necessary. Otherwise, disconnect J2/P2 and check for damage or corrosion. If the problem is not resolved, replace the ECM. STOP.
TEST STEP RESULT DIAGNOSIS/ACTION
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96 4016-E61TRS Diagnostic Manual, May 2000
Step 5: Check Solenoid For Shorts
• Turn the Engine Control Switch to the OFF position.
• Disconnect the suspect relay or solenoid.
• Attempt to start the engine with the suspect relay or solenoid disconnected.
• Check for an Active 17-06, 338-06, or 444-06 diagnostic code.
Diagnostic code 17-06, 338-06, or 444-06 should NOT be Active when the suspect solenoid or relay is disconnected.
OK ⇒ The short is present when the solenoid or relay is connected, and disappears when
disconnected. Check the solenoid or relay
connections for damage or corrosion. Repair as necessary. If the problem is not resolved, replace the suspect relay or solenoid. STOP.
NOT OK ⇒ Diagnostic code 17-06, 338-06, or 444-06 is still Active when the suspect relay or solenoid
disconnected. Proceed to Step 7.
Step 6: Check Harness For An Open Circuit Or Short To +Battery
• Disconnect the suspect relay or solenoid.
• Turn the Engine Control Switch to the STOP position, if not already done.
• Short (connect) the harness wires of the suspect relay or solenoid.
• Check for an Active 17-05, 338-05, or 444-05 diagnostic code.
Open Circuit diagnostic code 17-06, 338-06, or 444-06 should NOT be Active when the suspect solenoid circuit is shorted.
OK ⇒ The harness and ECM check OK. Check the solenoid connections for damage or corrosion.
Repair as necessary. If the problem is not resolved, replace the suspect relay or solenoid.
STOP.
NOT OK ⇒ Proceed to Step 8.
Step 7: Isolate Harness To Check ECM Operation
• Turn the Engine Control Switch to the OFF position.
• Use a wire removal tool to remove the +Battery supply wire for the shorted circuit (P2 terminal 10, 11, or 12).
• Attempt to start the engine with the suspect relay or solenoid disconnected.
• Check for an Active 17-06, 338-06, or 444-06 diagnostic code.
See Figure P-513.2.
Diagnostic code 17-06, 338-06, or 444-06 should NOT be Active when the suspect solenoid circuit is isolated (disconnected) from the ECM.
OK ⇒ The short circuit is in the harness. Repair or replace the harness as necessary. STOP.
NOT OK ⇒ Diagnostic code 17-06, 338-06, or 444-06 is still Active when the harness is isolated from the ECM.
Replace the ECM. STOP.
TEST STEP RESULT DIAGNOSIS/ACTION
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Step 8: Check ECM Output At J2
• Remove power from the engine control system. Turn the Engine Control Switch to the OFF position.
• Disconnect J2/P2 and check for damaged or corroded terminals. Repair as necessary.
• Reconnect J2/P2. Use a wire removal tool to remove the suspect solenoid driver and return wires at J2.
• Install a jumper wire with Deutsch socket terminals at each end between the +Battery Supply (Start,
Prelubrication, or Fuel Shutoff) and Return terminal of the suspect circuit at the Breakout-T.
• Restore power to the engine control system and turn the Engine Control Switch to the STOP position.
• Check for an Active 17-05, 338-05, or 444-05 diagnostic code.
See Figure P-513.2.
Open Circuit diagnostic code 17-06, 338-06, or 444-06 should NOT be Active when the suspect solenoid circuit is shorted.
OK ⇒ The ECM detects the jumper at P2 but not at the solenoid connector.
Repair or replace the harness as necessary.
STOP.
NOT OK ⇒ The ECM does not detect the jumper at P2. Replace the ECM. STOP.
TEST STEP RESULT DIAGNOSIS/ACTION
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98 4016-E61TRS Diagnostic Manual, May 2000