
TROUBLESHOOTING [ENGINE CONTROL KL]
STEP
INSPECTION
ACTION
4
CHECK FOR UNMETERED AIR LEAKS
Fuel calculations can be affected by
unmetered air leaks.
• Carefully inspect following areas for
potential air leaks.
• Hoses connecting to MAF sensor
• Hoses connecting to throttle body
• Intake manifold gasket leaks
• Positive crankcase ventilation (PCV)
disconnected
• Vacuum lines disconnected
• Improperly seated engine oil dipstick
and tube
• Exhaust leaks at flanges and gaskets
• Are there any air leaks?
Yes
Air leaks located.
SERVICE source of air leak.
RESET PCM to completely clear DTCs.
c r After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
No
Go to next step.
5
CHECK OF HEATED OXYGEN SENSOR
CIRCUIT WIRING WITH PCM CONNECTED
• Key off.
• PCM connected.
• Disconnect suspected heated oxygen
sensor.
• Jumper heated oxygen sensor signal circuit
to power circuit at heated oxygen sensor
harness connector.
• NGS tester connected.
• Key on, engine off.
• Access correct heated oxygen sensor PID.
• 02S11 (Front RH)
• 02S21 (Front LH)
Note
• Heated oxygen sensor displayed as 02S11
(Front RH), 02S 12 (Middle), 02S21 (Front
LH) or 0 2S 13 (Rear) on NGS tester.
•
Is voltage greater than 1.50 volts?
Yes
Heated oxygen sensor signal circuit is not faulty.
REPLACE heated oxygen sensor.
CHANGE oil/filter.
RESET PCM to completely clear DTCs.
tr
After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
No
Go to next step.
6
CHECK RESISTANCE OF HEATED OXYGEN
SENSOR SIGNAL CIRCUIT
• Key off.
• Disconnect NGS tester.
• Disconnect PCM. Inspect both ends of
connect for bent or pushed out pins,
corrosion or other damage. Service as
necessary.
• Install breakout box. Leave PCM
disconnected.
• Measure resistance between heated
oxygen sensor signal Test Pin at breakout
box and heated oxygen sensor harness
connector.
• H 02S (Front RH)=Test Pin 60
• H 02S (Front LH)=Test Pin 87
• Measure resistance between following test
pin at breakout box and heated oxygen
sensor harness connector.
• Ground=Test Pin 91
• Is resistance less than 5.0 ohms?
Yes
Go to next step.
No
Resistance is high.
SERVICE open circuit.
REMOVE breakout box.
RECONNECT all components.
RESET PCM to completely clear DTCs.
tr
After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
0 1 -0 1 B -2 6
Summary of Contents for MX-6 1998
Page 1: ......
Page 501: ...STARTING SYSTEM 3 If not as specified replace the starter interlock switch 01 19 3...
Page 803: ...MANUAL TRANSAXLE W 6 U 5 1 5 W A C 05 15 7...
Page 934: ...CONTROL SYSTEM CONTROL SYSTEM STRUCTURAL VIEW W6U740WA0 07 40 2...
Page 983: ...SERVICE TOOLS 08 60 SERVICE TOOLS 08 RESTRAINTS S S T 08 60 1 08 RESTRAINTS SST 08 60 1...