Checking Components And Wiring
- Ignition off.
Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation.
Check the resistance values of the potentiometers in the throttle unit and damper motor winding.
NOTE:The resistance of the motor winding in the damper motor is very low.
Replace the throttle unit if necessary.
Check the cable (+) for the damper motor between engine control module (ECM) terminal #A35 (#A35) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Check the cable (-) for the damper motor between engine control module (ECM) terminal #A36 (#A36) and throttle unit terminal #1 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Also check the damper motor cables (+) and (-). Check for a short-circuit to each other.
Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary.
The throttle unit is damaged if the diagnostic trouble code (DTC) recurs.
NOTE:If the throttle unit is replaced it must be adapted.
Other information:
- see CONNECTING THE BREAKOUT BOX
- For 5 cylinder turbocharged engines -2004, see SIGNAL DESCRIPTION
- For 5 cylinder turbocharged engines 2005-, see SIGNAL SPECIFICATION .
- For 6 cylinder engines -2004, see SIGNAL SPECIFICATION
- For 6 cylinder engines 2005-, see SIGNAL SPECIFICATION .
- For resistance values: COMPONENT SPECIFICATIONS
- For B5xx4T, see THROTTLE BODY (ELECTRONIC THROTTLE MODULE), REPLACING .
- For B6xx4T, see THROTTLE BODY (ELECTRONIC THROTTLE MODULE), REPLACING .
- For B5xx4T, see THROTTLE BODY (TB), CLEANING .
- For B6xx4x, see THROTTLE BODY (TB), CLEANING .
- see CHECKING WIRING AND TERMINALS .
- Continue
Refer to INFORMATION