EEC-IV code 74
#1
EEC-IV code 74
Does any one have information about this code?
I’s the only code I'm getting now in the engine running part of the <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com></O></FONT>
In the KOEO part, I get code 11.
And YES before any one asked if I stepped on the brakes at the right time, (after the engine code is sent) I did in fact step on the brake pedal, I Know it the right one as this is an automatic and the only large pedal.<O></O>
How important it this code and what does it mean when it is a fault
I’s the only code I'm getting now in the engine running part of the <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com></O></FONT>
In the KOEO part, I get code 11.
And YES before any one asked if I stepped on the brakes at the right time, (after the engine code is sent) I did in fact step on the brake pedal, I Know it the right one as this is an automatic and the only large pedal.<O></O>
How important it this code and what does it mean when it is a fault
#2
Pinpoint test FD Brake On/Off (BOO)
FD1 - Code 74
Did you press the brake during the KOER test.
Yes – Go to FD2
No – Rerun KOER test
FD2
Check for damaged or corroded pins at processor
Install breakout box, leave processor disconnected, and measure voltage between pin 2 and 40 while depressing and releasing the brake pedal.
Does the voltage cycle?
Yes – Replace processor
No – Go to FD3
FD3
Install breakout box, leave processor disconnected.
Is the resistance greater than 10,000 ohms
Yes – Go to FD4
No – Repair short in circuit
FD4
Install breakout box, leave processor disconnected.
Disconnect the BOO circuit at the 12 pin connector and measure the resistance between pins 2 and the 12 pin connector.
Is resistance greater then 5 ohms?
Yes – Service open cicuit
No – Go to shop manual group 32.
FD5 - Code 75
Check for damaged or corroded pins at processor
Install breakout box, leave processor disconnected, and measure voltage between pin 2 and 40 while depressing and releasing the brake pedal.
Does the voltage cycle?
Yes – Replace processor
No – Go to FD6
FD6
Install breakout box, leave processor disconnected.
Disconnect the BOO circuit at the 12 pin connector and measure the voltage between pins 2 and the engine block ground
Is voltage greater then 10.5 volts?
Yes – Service short circuit
No – Go to shop manual group 32.
FD1 - Code 74
Did you press the brake during the KOER test.
Yes – Go to FD2
No – Rerun KOER test
FD2
Check for damaged or corroded pins at processor
Install breakout box, leave processor disconnected, and measure voltage between pin 2 and 40 while depressing and releasing the brake pedal.
Does the voltage cycle?
Yes – Replace processor
No – Go to FD3
FD3
Install breakout box, leave processor disconnected.
Is the resistance greater than 10,000 ohms
Yes – Go to FD4
No – Repair short in circuit
FD4
Install breakout box, leave processor disconnected.
Disconnect the BOO circuit at the 12 pin connector and measure the resistance between pins 2 and the 12 pin connector.
Is resistance greater then 5 ohms?
Yes – Service open cicuit
No – Go to shop manual group 32.
FD5 - Code 75
Check for damaged or corroded pins at processor
Install breakout box, leave processor disconnected, and measure voltage between pin 2 and 40 while depressing and releasing the brake pedal.
Does the voltage cycle?
Yes – Replace processor
No – Go to FD6
FD6
Install breakout box, leave processor disconnected.
Disconnect the BOO circuit at the 12 pin connector and measure the voltage between pins 2 and the engine block ground
Is voltage greater then 10.5 volts?
Yes – Service short circuit
No – Go to shop manual group 32.
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