511-528
NOTEKOEO refers to Key On Engine Off (KOEO)
KOER refers to Key On Engine Running (KOER)
DTC refers to Diagnostic Trouble Code (DTC)
DTCs should be diagnosed in the order they are received.
DTC 511
Powertrain control module Read Only Memory test failure, KOEO self-test.
KOEO Hard Code - Replace Powertrain Control Module.
KOER Hard Code - Replace Powertrain Control Module.
KOEO Memory Code - Replace Powertrain Control Module.
DTC 512
Powertrain control module Keep Alive Memory test failure.
KOEO Memory Code Go to QB1
QB1 - Check KAPWR to PCM
DTC 513
Powertrain control module internal voltage failure, KOEO self-test.
KOEO Hard Code - Replace Powertrain Control Module.
KOER Hard Code - Replace Powertrain Control Module.
KOEO Memory Code - Replace Powertrain Control Module.
DTC 519
Power Steering Pressure switch circuit open during KOEO self-test.
KOEO Hard Code Go to FF1
FF - Power Steering Pressure (PSP) Switch
DTC 521
Power Steering Pressure switch circuit did not change states during KOER self-test.
KOER Hard Code Go to FF5
FF5 - Verify Operator Interaction DTC 521
DTC 522
Vehicle not in "PARK" or "NEUTRAL" during KOEO or Park/Neutral switch circuit open.
KOEO Hard Code Go to TD1
TD - Manual Lever Position (MLP) Sensor
DTC 525
Indicates vehicle in gear or A/C "ON" during self-test.
KOEO Hard Code Go to TA1
TA1 - System Identification
KOEO Memory Code Go to TA1
TA1 - System Identification
DTC 527
Park/Neutral Position switch circuit open or A/C on KOEO self-test.
KOEO Hard Code Go to TA1
TA1 - System Identification
DTC 528
Clutch Pedal Position switch circuit failure.
KOEO Memory Code Go to TA1
TA1 - System Identification