P1240
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE.
Engine runs unevenly
Cruise control not working.
Starting problems, especially when engine is cold
Throttle Motor Circuit. Shorted.
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.
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Fault criteria:
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Motor current exceeding 8A during the positive or negative section of the PWM period. Criteria fulfilled for 3 min.
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Dependents:
System reaction to a fault:
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Cruise control blocked.
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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 section
Fault handling III, other emission-related components and functions
for more information.)
Diagnostic help
The trouble code is generated when the lead from control module pin 48 is short circuited to B+.
Functions in the diagnostic tool related to the fault:
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Activate output for throttle motor.
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See also description on activating under
"Activate" 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.
