DTC 2-3-4

FG. Diagnostic trouble code (DTC) 2-3-4 DI EZ 116 K

2-3-4 Throttle position (TP) switch signal in idling position faulty



DTC conditions:
There is no signal from the TP switch in the idling position, or the control module does not receive a signal from the TP sensor when the fuel has been shut off and the engine is braking.

Causes of fault:
Break in the wiring to the control module.
Break in the idle switch.
Incorrectly adjusted idle switch.

Fault symptoms:
- Difficulty starting engine when fully warmed up.
- Poor idling

FG1




Checking the the idle switch
Turn the throttle pulley a little and listen to hear if the idle switch clicks.

If the switch clicks
^ DTM 2 FG2.

If the switch does not click
^ WC. Adjust the TP switch. WC. Adjusting the TP Switch

FG2




Diagnostic test mode (DTM) 2
^ Go into DTM 2 and check the TP switch in accordance with CB4 and CB5.

If response code 3-3-4 is obtained
Intermittent fault.
^ Check the wiring between terminal 2 in the TP switch connector and DI#7 for loose contacts in accordance with NA5 and clean the TP switch connector in accordance with NA7. NA. Checking the Wiring

If response code 3-3-4 is not obtained
^ check the TP switch FG3.

FG3




Checking the throttle position (TP) switch
- Ignition off.
- Disconnect the TP switch.
Connect an ohmmeter between terminals 18 and 2 on the TP switch.
The ohmmeter should read approx. 0 ohms.
- Open the throttle a little.
The ohmmeter should read infinite resistance.

If both readings are OK
^ check the wiring between terminal 2 on the TP switch connector and DI#7 for breaks in accordance with NA2 and clean the TP switch connector in accordance with NA7. NA. Checking the Wiring

If both readings deviate
^ try using a new TP switch.