Checking Components

Checking Components







Check, using the diagnostic trouble code (DTC) statuses, if the fault is intermittent or permanent.

Signal too high. Permanent fault
Check the cable between engine control module (ECM) terminal #B9 and accelerator pedal position sensor terminal #6 for short circuit to supply voltage.

Signal too low. Permanent fault
Check the cable between engine control module (ECM) terminal #B9 and accelerator pedal position sensor terminal #6 for short circuit to ground.

Intermittent fault
Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is. The operating conditions can be, for example, whether the engine was running, what the speed of the vehicle was and what the battery voltage in the system was. This information can facilitate searching for an intermittent fault. If the fault was stored at a battery voltage lower than 10 V with engine speed at 0 rpm, this indicates that the fault may have occurred when the engine was started. This, in turn, indicates that the battery's charging status is not OK.

- Check the battery status.

HINT: Check, using VIDA vehicle communication, that the parameter "Accelerator pedal, PWM (%)" shows the correct values. To aid fault tracing, use Component specifications when measuring and checking relevant components and use Wiring diagram, Signal description and Breakout box to measure and control signals to and front the control module or its components.

For markets where the upgraded software, released during 2006 or later, is available, the solution may be to load the upgraded software. As the detection time has increased from 0.1 to 0.4 seconds, the upgraded software becomes more tolerant towards short intermittent interference among other things.

Remedy as necessary.

Other information
- To connect the breakout box, see Connecting the breakout box.
- To access/replace the accelerator pedal (AP) position sensor, see Replacing the accelerator pedal module
- For information about signals on 5-cyl, see Signal specification.
- For information about signals on 6-cyl, see Signal specification.
- See Identifying upgraded software ECM/ETM. Identifying Upgraded Software ECM/ETM
- Checking wiring and terminals

CAUTION: In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed:
- Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
- Then turn on the ignition and turn it off again.
- Wait another three minutes. If the electric cooling fan is running, you have to wait another two minutes after the electric cooling fan has stopped, to make sure that Electronic throttle module (ETM) has been shut off correctly.

If this is not done correctly, diagnostic trouble codes may remain even after deleting diagnostic trouble codes and any reconfiguration may remain, despite the problem being fixed.

Continue: Refer to Fault-Tracing Information - Interrupted Fault. Fault-Tracing Information - Interrupted Fault