2003 problems
Issue does not appear to be due to the brake switch side of the interlock circuit.
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Issue may be due to the PCM not sending the ground signal to the shift lock solenoid.
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Here is a test to see if the ground signal from the transmission range switch (when in Park) is going through the PCM.
1. Unplug Connector C at the PCM, test for voltage at terminal no. 17 (Blu/Blk wire). This wire is for the PCM to detect the transmission range
switch Park signal. Is there 0 volts in Park? There should be no voltage in Park. In any other position, there should be voltage.
2. Set the multimeter to test for continuity. Touch one of the meter's lead to terminal no. 17 and other meter's lead to body ground.
Is there continuity to ground with the shifter in Park?
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Issue may be due to the PCM not sending the ground signal to the shift lock solenoid.
************************************************** ***********
Here is a test to see if the ground signal from the transmission range switch (when in Park) is going through the PCM.
1. Unplug Connector C at the PCM, test for voltage at terminal no. 17 (Blu/Blk wire). This wire is for the PCM to detect the transmission range
switch Park signal. Is there 0 volts in Park? There should be no voltage in Park. In any other position, there should be voltage.
2. Set the multimeter to test for continuity. Touch one of the meter's lead to terminal no. 17 and other meter's lead to body ground.
Is there continuity to ground with the shifter in Park?
We may have found the cause of your issues.
The transmission range switch may be faulty. There should be no voltage in Park at that wire. It suppose to send ground to the PCM in Park. Take a look at the wiring and connector terminal there too; but, it may be due to a faulty range switch.
You can test the transmission range switch for continuity (see attached imaged).
The transmission range switch may be faulty. There should be no voltage in Park at that wire. It suppose to send ground to the PCM in Park. Take a look at the wiring and connector terminal there too; but, it may be due to a faulty range switch.
You can test the transmission range switch for continuity (see attached imaged).
We may have found the cause of your issues.
The transmission range switch may be faulty. There should be no voltage in Park at that wire. It suppose to send ground to the PCM in Park. Take a look at the wiring and connector terminal there too; but, it may be due to a faulty range switch.
You can test the transmission range switch for continuity (see attached imaged).
The transmission range switch may be faulty. There should be no voltage in Park at that wire. It suppose to send ground to the PCM in Park. Take a look at the wiring and connector terminal there too; but, it may be due to a faulty range switch.
You can test the transmission range switch for continuity (see attached imaged).
This next test is related to the Shift Lock Solenoid (SLS) will require that you back-probe the PCM connector terminal.
At Connector A, terminal no. 22 (Yel/Blk wire), backprobe and measure for voltage at this terminal. (Refer to one of my earlier post regarding backprobing.)
With ignition switch ON (II), in Park, brake pedal pressed, and accelerator released. There should be battery voltage. (Standard battery voltage is 12 volts.)
At Connector A, terminal no. 22 (Yel/Blk wire), backprobe and measure for voltage at this terminal. (Refer to one of my earlier post regarding backprobing.)
With ignition switch ON (II), in Park, brake pedal pressed, and accelerator released. There should be battery voltage. (Standard battery voltage is 12 volts.)
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milescwright
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May 23, 2010 09:46 AM



