B2434

Fault Symptom
TCS OFF lamp on, TCS system inoperative

Condition
- Control module output pin 18, no continuity.
- Control module output pin 35, no continuity.
- Control module input pin 27, no continuity.
- Throttle butterfly mechanism or motor binding.

NOTE:
B2434 is generated when the butterfly's "ACTUAL" value does not coincide with its "REFERENCE" value. This means that the butterfly cannot assume a position calculated by the control module or that the control module cannot calculate the position of the butterfly. This could be due to any of three reasons:
- A mechanical fault, such as a binding throttle butterfly.
- An electrical fault, such as a break in the wiring, which prevents the throttle motor from working.
- No information received by the control module from the throttle body about the position of the butterfly, such as no continuity on pin 27 of the control module input.
B2434 can be generated in connection with fault diagnosis when the throttle body wiring is disconnected and the ignition switch is turned to the Drive Position.





Diagnostic Procedure
1. With the ignition switched off, check that the throttle butterfly can easily be moved to the closed position by hand and that no binding occurs. The force of the spring should also return it to the open position with ease.
If it is in proper working order, proceed to point 2. if it is not, remedy the fault if possible or install a replacement throttle body.
2. Connect the ISAT (scan tool).
With the ignition in the Drive position, open the TCS throttle butterfly halfway by hand. Then select "BUTTERFLY CLOSING ON" in the "ACTIVATE" menu.

NOTE:
- If the actuator motor rotates the TCS throttle butterfly towards the open position when "BUTTERFLY CLOSING ON" is activated, it is because the control module receives no information about the position of the butterfly on input pin 27.
- If the butterfly either closes or opens, proceed to point 4.
- If it does not, continue with point 3.

3. Carry out the measures described under diagnostic trouble code B2433 B2433
4. Carry out the measures described under diagnostic trouble codes B1302 and B1303 B1302
- If it is then see preliminary diagnostic information.