This is a test to determine why the starter motor will not engage. This type of condition is called a no crank condition. It is different from a no start condition in that the starter motor does not engage the flywheel/torque convertor/flexplate at all. A no start condition means the starter engages and the crankshaft spins but the engine will not fire up and run.
Does the starter make any noise when you attempt to start the vehicle? Also try and have someone else start the car and you hold/touch the starter to see if it is engaging. If you don't feel anything you may have either a bad ground or incomplete circuit from the battery to the starter. If the starter clicks then you may have a bad starter, starter solenoid or siezed engine.
Is the car a manual or automatic?
If the car is automatic, try moving the shifter mechanism back and forth from park to any other gear. If the vehicle then cranks, the shifter linkage may need adjusting or the PRNDL switch may need replacing. This is inside the transmission on the 41TE (2gnt a/t) and requires removal of the valve body.
There should be a ground wire at the bottom bolt of the starter. Make sure that's attatched properly.
The ASD Relay is responsible for allowing the starter motor to engage when commanded. If the car is auto, it's the middle relay on the firewall next to the battery. If it's a manual, it's the one closest to the driver's side of the car.
There's four wires in it. There's three in a row on what will be known as the left side and two on the right with a larger gap in the middle. The locking tab will be on the left. Pin A is black with a red tracer, is the top left one, and is the ignition switch output circuit. Pin B is the top right one, is black with a yellow tracer, and is the starter relay output circuit. Pin C is Black with a red tracer, is bottom right, and is Fused B(+). Pin D is Black with a yellow tracer, is bottom right, and is pnp switch sense.
The single wire that plugs in to the bottom side of the starter is the starter relay output circuit. You should have continuity from the single wire connector on the starter to Pin B at the relay. If you don't, there's an open circuit between the starter and the starter relay.
Disconnect the ASD relay. With a multimeter in Voltmeter mode check the Fused B(+) pin. There should be battery voltage( 11.6v or more) present. If there is not, the circuit is incomplete from the battery to this pin in the relay connector. Check your fuses in the PDC (Power distribution center next to the battery) as well as the ones in the Junction Block (next to your left foot as you drive). If voltage is present continue.
This next step may require a helper. With the relay still disconnected, measure the voltage at the ignition switch output circuit while turning the key in to the crank position. The circuit should have battery voltage present (10.0 volts or more). If there is not, then there is a circuit open from the ignition switch to the ASD relay. If voltage is present, continue.
Make sure the transmission is in park or neutral for this next step. Breifly jump a wire from the starter relay output circuit (Pin b) and fused B(+) circuit (Pin C). If the starter motor engaged replace the starter motor relay. If the starter motor did not engage, did it click when the wire was jumped?
Yes: reinstall starter relay, check battery cables for high resistance. Also attempt to turn the engine over 360 degrees manually. If the engine spins freely, replace the starter motor. If it does not: the engine may be locked up or something is binding the flywheel/torque converter/flexplate.
No: disconnect the starter realy output wire from the starter solenoid. Measure the resistance from the starter relay output wire at the starter to the ASD relay. Is the resistance below 5 ohms?
Yes: reinstall starter relay, check battery cables for high resistance. Also attempt to turn the engine over 360 degrees manually. If the engine spins freely, replace the starter motor. If it does not: the engine may be locked up or something is binding the flywheel/torque converter/flexplate.
No: repair the circuit from the starter to the ASD relay for an open or high resistance condition.
Let me know what you find.
Doug
Does the starter make any noise when you attempt to start the vehicle? Also try and have someone else start the car and you hold/touch the starter to see if it is engaging. If you don't feel anything you may have either a bad ground or incomplete circuit from the battery to the starter. If the starter clicks then you may have a bad starter, starter solenoid or siezed engine.
Is the car a manual or automatic?
If the car is automatic, try moving the shifter mechanism back and forth from park to any other gear. If the vehicle then cranks, the shifter linkage may need adjusting or the PRNDL switch may need replacing. This is inside the transmission on the 41TE (2gnt a/t) and requires removal of the valve body.
There should be a ground wire at the bottom bolt of the starter. Make sure that's attatched properly.
The ASD Relay is responsible for allowing the starter motor to engage when commanded. If the car is auto, it's the middle relay on the firewall next to the battery. If it's a manual, it's the one closest to the driver's side of the car.
There's four wires in it. There's three in a row on what will be known as the left side and two on the right with a larger gap in the middle. The locking tab will be on the left. Pin A is black with a red tracer, is the top left one, and is the ignition switch output circuit. Pin B is the top right one, is black with a yellow tracer, and is the starter relay output circuit. Pin C is Black with a red tracer, is bottom right, and is Fused B(+). Pin D is Black with a yellow tracer, is bottom right, and is pnp switch sense.
The single wire that plugs in to the bottom side of the starter is the starter relay output circuit. You should have continuity from the single wire connector on the starter to Pin B at the relay. If you don't, there's an open circuit between the starter and the starter relay.
Disconnect the ASD relay. With a multimeter in Voltmeter mode check the Fused B(+) pin. There should be battery voltage( 11.6v or more) present. If there is not, the circuit is incomplete from the battery to this pin in the relay connector. Check your fuses in the PDC (Power distribution center next to the battery) as well as the ones in the Junction Block (next to your left foot as you drive). If voltage is present continue.
This next step may require a helper. With the relay still disconnected, measure the voltage at the ignition switch output circuit while turning the key in to the crank position. The circuit should have battery voltage present (10.0 volts or more). If there is not, then there is a circuit open from the ignition switch to the ASD relay. If voltage is present, continue.
Make sure the transmission is in park or neutral for this next step. Breifly jump a wire from the starter relay output circuit (Pin b) and fused B(+) circuit (Pin C). If the starter motor engaged replace the starter motor relay. If the starter motor did not engage, did it click when the wire was jumped?
Yes: reinstall starter relay, check battery cables for high resistance. Also attempt to turn the engine over 360 degrees manually. If the engine spins freely, replace the starter motor. If it does not: the engine may be locked up or something is binding the flywheel/torque converter/flexplate.
No: disconnect the starter realy output wire from the starter solenoid. Measure the resistance from the starter relay output wire at the starter to the ASD relay. Is the resistance below 5 ohms?
Yes: reinstall starter relay, check battery cables for high resistance. Also attempt to turn the engine over 360 degrees manually. If the engine spins freely, replace the starter motor. If it does not: the engine may be locked up or something is binding the flywheel/torque converter/flexplate.
No: repair the circuit from the starter to the ASD relay for an open or high resistance condition.
Let me know what you find.
Doug
