
TROUBLESHOOTING [ENGINE CONTROL FS]
STEP
INSPECTION
ACTION
3
HEATED OXYGEN SENSOR CIRCUIT TEST
(WITH LEAN DTCS)
• Key off.
• NGS tester connected.
• Disconnect suspected heated oxygen
sensor. Inspect for damaged or pushed out
pins, water, corrosion, loose wires. Service
as necessary.
• Key on, engine off.
• Access correct heated oxygen sensor PID.
• 02S11 PID
Note
• If spark occurs, remove jumper and go to
step 7 (check fuse in the heater circuit)
• Jumper heated oxygen sensor signal circuit
to heated oxygen sensor heater power
circuit at heated oxygen sensor vehicle
harness connector.
•
Is reading 1.30 volts or greater?
Yes
CHECK heated oxygen sensor ground circuit.
Go to next step.
No
An open or short to ground exists in vehicle harness or
PCM.
Go to step 6.
4
CHECK SIGNAL RETURN CIRCUIT FOR
SHORTS AND OPENS
• Key off.
• Install breakout box. PCM connected.
• Measure resistance between heated
oxygen sensor ground terminal at heated
oxygen sensor vehicle harness connector
and ground Test Pin 91 at breakout box.
•
Is resistance reading less than 5.0
ohms?
Yes
REMOVE breakout box.
Go to step 12.
No
Go to next step.
5
CHECK HEATED OXYGEN SENOSR
SIGNAL RETURN CIRCUIT IN VEHICLE
HARNESS
• Breakout box installed. PCM disconnected.
• Measure resistance between heated
oxygen sensor ground terminal at heated
oxygen sensor vehicle harness connector
and ground Test Pin 91 at breakout box.
•
Is resistance reading less than 5.0
ohms?
Yes
REMOVE breakout box.
REPLACE PCM.
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
No
SERVICE open circuit.
REMOVE breakout box.
RESET PCM to completely clear DTCs.
c r After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
6
CHECK RESISTANCE OF HEATED OXYGEN
SENSOR AND HEATED OXYGEN SENSOR
GROUND CIRCUIT
• Key off.
• Disconnect PCM. Inspect both ends of
connector for bent or pushed out pins,
corrosion or other damage. Service as
necessary.
• Install breakout box. Leave PCM
disconnected.
• Disconnected suspected heated oxygen
sensor from harness. Inspect both ends of
connector for damaged or pushed out pins,
moisture, corrosion, loose pins. Service as
required.
• Measure resistance between suspected
heated oxygen sensor signal Test Pin at
breakout box and heated oxygen sensor
vehicle harness connector. Use pin
assignment below and record reading:
• Heated oxygen sensor (Front)=Test Pin
60
• Heated oxygen sensor ground=Test Pin
91
•
Is resistance reading less than 5.0
ohms?
Yes
Go to next step.
No
SERVICE open circuit.
REMOVE breakout box.
RECONNECT PCM and heated oxygen sensor.
RESET PCM to completely clear DTCs.
c r After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
0 1 -0 1 A -3 5
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...