674
Engine Idle Higher than Expected
Idle control system RPM higher than
expected
View and note 'freeze-frame' data if
available.
Check for associated DTCs and
perform tests as required.
Reset DTCs, if fault still present check
the following:
• Air vacuum leak (MAP sensor
hoses)
• Leaking air intake after the throttle
bodies
• Evaporative system
• Secondary air injection system
System voltage - battery circuit
malfunction
View and note diagnostic software
'sensor' data.
Make sure voltage across battery is
acceptable, note voltage.
Disconnect engine ECM and proceed
to pinpoint test 1:
Check cable and terminal
integrity:
- Engine ECM pin A08
- Engine ECM pin A21
- Engine EMS relay pin 5
Rectify fault, proceed to
test 3
With Ignition on check voltage at:
- Engine ECM pin A08
- Engine ECM pin A21
Same as across
battery voltage
Less than
across battery
voltage
Locate and rectify wiring
fault, proceed to test 3