P1531
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Limited engine speed.
CHECK ENGINE.
Idling speed incorrect
Cruise control not working.
Starting problems, especially when engine is cold
Pedal Position Sensor 1 and 2 Circuit. Adapted Sum Out of Range.
Fault symptoms
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Cruise control not working.
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Starting problems, especially when engine is cold
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On-Board Diagnostics
Type of diagnosis:
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Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.
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Enable criteria:
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Ignition in ON position. Pedal fully released.
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Fault criteria:
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Sum of voltages from pedal position sensors 1 and 2 exceeding adapted sum by more than 6%.
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Dependents:
System reaction to a fault:
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Fuel shut-off at engine speeds above 2200 rpm. Throttle control in limp-home. Limp-home solenoid will be activated 5 times in succession each time the ignition is switched on until the fault has been repaired and the diagnostic trouble codes cleared.
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OK report:
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Accelerator pedal has been depressed at some time and then fully released. 120 s has expired since then without fault criteria being fulfilled.
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Fault handling:
(See “Fault diagnosis, general” for more information.)
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CHECK ENGINE goes on immediately and can be turned off only by clearing the trouble codes.
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Diagnostic help
Fault diagnosis concerns electrical fault in connecting leads or in one of the sensors.
Functions in the diagnostic tool related to the fault:
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Pedal Position Sensor 1, unit V.
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Pedal Position Sensor 2, unit V.
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See also description of readings under
"Read Values" menu
for more information.
Checking the wiring
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.
See
P1530
.
