Volkswagen Workshop Manuals
Jetta L4-1781cc 1.8L SOHC (ACC) Can (1995)
Powertrain Management > Tune-up and Engine Performance Checks > Idle Speed > System Information > Technical Service Bulletins > Page 2131
Idle Speed: Testing and Inspection
Idle speed, checking
^ Idle speed is not adjustable.
Mono-Motronic Engine Control Module (ECM) and stored in the Diagnostic Trouble Code (DTC) Memory.
^ No malfunctions stored in Diagnostic Trouble Code (DTC) Memory (Check and erase DTC Memory) See: Computers and Control
Systems/Testing and Inspection
^ Accelerator Pedal cable adjustment OK
Connect VAG 1367 engine tester using VAG 1367/8 inductive pickup.
Start engine and run at idle.
Check idle speed:
If the idle speed is not within the specified range:
Check Throttle Position (TP) Actuator See: Computers and Control Systems/Throttle Position Actuator/Testing and Inspection
Vehicles with CO tap tube
Connect VAG 1363A CO Tester to CO tap tube with VAG 1363/3 adapter.
Check idle speed and exhaust CO content:
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