Fault Conditions

P124O

Throttle Motor Circuit. Shorted.







Fault symptoms
- CHECK ENGINE.
- Engine runs unevenly.
- Cruise Control not working.

On-Board Diagnostics

Type of diagnosis:
- Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

Enable criteria:
- Ignition in ON position.

Fault criteria:
- Motor current exceeding 8 A during the positive or negative section of the PWM period. Criteria fulfilled for 3 mm.

Dependents:
- None.

System reaction to a fault:
- Cruise Control blocked.

OK report:
- Accelerator pedal has been depressed at some time and then fully released. 120 s has expired since then without fault criteria being fulfilled.

Fault handling: (See Fault handling III, Other emission-related components and Function for more information.) Fault Handling III, Other Emission-Related Component & Function
- Type III.

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:
- Activate output for throttle motor.

See also description on activating under "Activate" menu for more information. Tech 2 Menu Structure, DTC Menu, Read Value, Activate, Sys Info

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 breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.