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BOSCH
F 019 Z2E 750
f019z2e750
ZEXEL
105447-0921
1054470921
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106671-4794
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Problem 4
The starting motor remains engaged or the starting motor continues to run after the engine is running.
Check the components of the starting circuit.
Measure the voltages at terminal (TS-26) of the junction box and at terminal (ESS-12) of the electronic speed switch while the engine is running. Result
The voltage at both terminals is zero volts.The problem is in the starting motor (SM), the pinion solenoid (PS), or the magnetic switch (MS). Repair the faulty component. STOP.
The voltage at terminal (ESS-12) is between 15 volts and 32 volts. The voltage at terminal (TS-26) is above 15 volts or below 15 volts but not zero volts.The contacts for the crank terminate (CT) switch of the electronic speed switch (ESS) do not open. Refer to Testing and Adjusting, "Crank Terminate Speed Calibration". If the ESS is not faulty, check diode (D3). Refer to Testing and Adjusting, "Diode Test".
The voltage at both terminals is between 15 volts and 32 volts.The voltage at the terminals is greater than zero volts. During the normal operation of the start/stop switch, the start/stop switch opens across the contacts of the START position. Also, the start/stop switch closes across the contacts of the RUN position. The switch closes when the toggle or the lever of the switch moves from the START position to the RUN position. Repair the switch if the voltage is zero.
The voltage at terminal (ESS-12) is not zero.The CT contacts of the ESS are not opening. Refer to Testing and Adjusting, "Crank Terminate Speed Calibration".Problem 5
The engine shutdown occurs after the engine runs for more than 3 minutes.
Check the overspeed setting on the electronic speed switch (ESS).
Observe the indicator lamp on the ESS.
Reset the air shutoff lever, if equipped. Result
The indicator lamp on the ESS is turned on.Overspeed is indicated as the cause of the engine shutdown. Press the "RESET" button of the ESS. Find the cause of the overspeed. Refer to Testing and Adjusting, "Overspeed Verification Test" and Testing and Adjusting, "Overspeed Calibration". If the overspeed is adjusted properly and the problem persists, check the shielded cable. Only the shield should be connected to terminal 2 on the ESS. STOP.
The indicator lamp is turned off.Go to Step 2.
Check the oil pressure switches.
Connect a jumper between terminals (TS-9) and (TS-14) of the junction box.
Start the engine. Result
The engine starts and the engine runs.The problem is in the oil pressure switches. Go to Step 7 of "Problem 3".
The engine starts but engine shutdown occurs immediately.Go to Step 1 of "Problem 3".
The engine starts and the engine runs but engine shutdown occurs after the engine runs for more than 3 minutes.Go to Step 3.
The engine cranks but the engine does not start.Go to Step 1 of "Problem 1".Note: If the water temperature contactor switch causes overheating go to Step 8 of "Problem 1". If the water temperature contactor switch is not the problem, go to Step 1of "Problem 1".
Check the slave relay (SR1).
Disconnect the jumper from terminals (TS-9) and (TD-14).
Connect a jumper between terminals (TS-14) and
The starting motor remains engaged or the starting motor continues to run after the engine is running.
Check the components of the starting circuit.
Measure the voltages at terminal (TS-26) of the junction box and at terminal (ESS-12) of the electronic speed switch while the engine is running. Result
The voltage at both terminals is zero volts.The problem is in the starting motor (SM), the pinion solenoid (PS), or the magnetic switch (MS). Repair the faulty component. STOP.
The voltage at terminal (ESS-12) is between 15 volts and 32 volts. The voltage at terminal (TS-26) is above 15 volts or below 15 volts but not zero volts.The contacts for the crank terminate (CT) switch of the electronic speed switch (ESS) do not open. Refer to Testing and Adjusting, "Crank Terminate Speed Calibration". If the ESS is not faulty, check diode (D3). Refer to Testing and Adjusting, "Diode Test".
The voltage at both terminals is between 15 volts and 32 volts.The voltage at the terminals is greater than zero volts. During the normal operation of the start/stop switch, the start/stop switch opens across the contacts of the START position. Also, the start/stop switch closes across the contacts of the RUN position. The switch closes when the toggle or the lever of the switch moves from the START position to the RUN position. Repair the switch if the voltage is zero.
The voltage at terminal (ESS-12) is not zero.The CT contacts of the ESS are not opening. Refer to Testing and Adjusting, "Crank Terminate Speed Calibration".Problem 5
The engine shutdown occurs after the engine runs for more than 3 minutes.
Check the overspeed setting on the electronic speed switch (ESS).
Observe the indicator lamp on the ESS.
Reset the air shutoff lever, if equipped. Result
The indicator lamp on the ESS is turned on.Overspeed is indicated as the cause of the engine shutdown. Press the "RESET" button of the ESS. Find the cause of the overspeed. Refer to Testing and Adjusting, "Overspeed Verification Test" and Testing and Adjusting, "Overspeed Calibration". If the overspeed is adjusted properly and the problem persists, check the shielded cable. Only the shield should be connected to terminal 2 on the ESS. STOP.
The indicator lamp is turned off.Go to Step 2.
Check the oil pressure switches.
Connect a jumper between terminals (TS-9) and (TS-14) of the junction box.
Start the engine. Result
The engine starts and the engine runs.The problem is in the oil pressure switches. Go to Step 7 of "Problem 3".
The engine starts but engine shutdown occurs immediately.Go to Step 1 of "Problem 3".
The engine starts and the engine runs but engine shutdown occurs after the engine runs for more than 3 minutes.Go to Step 3.
The engine cranks but the engine does not start.Go to Step 1 of "Problem 1".Note: If the water temperature contactor switch causes overheating go to Step 8 of "Problem 1". If the water temperature contactor switch is not the problem, go to Step 1of "Problem 1".
Check the slave relay (SR1).
Disconnect the jumper from terminals (TS-9) and (TD-14).
Connect a jumper between terminals (TS-14) and