4 – OPERATOR SERVICE
45
Error Message
Displayed
Error Explanation &
Possible Causes
What To Check &
Corrective Action To Clear
Error
079 OPEN CIRCUIT
DRIVE PWM
The Lower Control has detected an open circuit on the
Drive PWM valve solenoid output when it was
energized during startup self diagnostics.
NOTE: A load of less than 70mA will be detected as
an open circuit. The typical load is approximately
800mA at 100%.
Possible causes include:
1. Faulty Drive PWM valve solenoid wiring
2. Faulty Drive PWM valve solenoid
3. Faulty Lower Control
1. Repair or replace Drive PWM valve solenoid
wiring
2. Replace Drive PWM valve
3. Replace Lower Control
080 SHORTED CIRCUIT
DRIVE PWM
The Lower Control has detected excessive current on
the Drive PWM valve solenoid output when it was
energized during startup self diagnostics.
Possible causes include:
1. Faulty Drive PWM valve solenoid wiring
2. Faulty Drive PWM valve solenoid
3. Faulty Lower Control
1. Repair or replace Drive PWM valve solenoid
wiring
2. Replace Drive PWM valve
3. Replace Lower Control
081 OPEN CIRCUIT
DRIVE ENABLE
The Lower Control has detected an open circuit on the
Drive Enable solenoid output when it was energized
during startup self diagnostics.
NOTE: A load of less than 70mA will be detected as
an open circuit. The typical load is approximately
800mA.
Possible causes include:
1. Faulty Drive Enable solenoid wiring
2. Faulty Drive Enable solenoid
3. Faulty Lower Control
1. Repair or replace Drive Enable solenoid wiring
2. Replace Drive Enable solenoid
3. Replace Lower Control
082 SHORTED CIRCUIT
DRIVE ENABLE
The Lower Control has detected excessive current on
the Drive Enable solenoid output when it was
energized during startup self diagnostics.
Possible causes include:
1. Faulty Drive Enable solenoid wiring
2. Faulty Drive Enable solenoid
3. Faulty Lower Control
1. Repair or replace Drive Enable solenoid wiring
2. Replace Drive Enable solenoid
3. Replace Lower Control
