
TROUBLESHOOTING [ENGINE CONTROL FS]
STEP
INSPECTION
ACTION
4
CHECK FOR OPEN HEATED OXYGEN
SENSOR POWER CIRCUIT
• Key off.
• Disconnect PCM. Inspect both ends of
connector for bent or pushed out pins,
corrosion or other damage. Repair as
necessary.
• Install breakout box. Leave PCM
disconnected.
• Disconnect suspected sensor.
• Measure the resistance between Test Pin
71 or 97 at breakout box and power circuit
at heated oxygen sensor vehicle harness
connector.
•
Is resistance less than 4.0 ohms?
Yes
Go to next step.
No
CHECK fuse. SERVICE open circuit if necessary.
REMOVE breakout box.
RECONNECT all components.
RESET PCM to completely clear DTCs.
p - After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
5
CHECK HEATED OXYGEN SENSOR
HEATER RESISTANCE
• Key off.
• Heated oxygen sensor disconnected.
• Connect circuit tester to heated oxygen
sensor heater ground and power terminals
at heated oxygen sensor connector, and
measure resistance of heated oxygen
sensor heater.
•
Is resistance between 3 and 30 ohms?
Yes
Go to next step.
No
REPLACE heated oxygen sensor.
REMOVE breakout box.
RECONNECT all components.
RESET PCM to completely clear DTCs.
c r After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
6
CHECK FOR HEATER GND AND POWER
CIRCUIT SHORTED TO HEATED OXYGEN
SENSOR CASE
• Disconnect suspected sensor.
• Measure the resistance between heated
oxygen sensor heater ground at heated
oxygen sensor connector and heated
oxygen sensor case.
• Measure resistance between heated
oxygen sensor heater ground or ground
terminal at heated oxygen sensor.
• Measure resistance between heated
oxygen sensor power circuit at heated
oxygen sensor connector and heated
oxygen sensor case.
•
Is resistance greater than 10,000 ohms?
Yes
Go to next step.
No
REPLACE heated oxygen sensor.
REMOVE breakout box.
RECONNECT all components.
RESET PCM to completely clear DTCs.
tr
After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
7
CHECK FOR SHORTS TO OTHER
GROUNDS AND POWER IN HEATED
OXYGEN SENOSR HEATER GROUND
HARNESS CIRCUITS
• Key off.
• Disconnect NGS tester from DLC.
• Disconnect suspected sensor.
• Disconnect PCM.
• Install breakout box. Leave PCM
disconnected.
• Use following list to measure resistance
between appropriate test pins at breakout
box.
• DTC P0135=H02S heater (Front)
(Heater ground) Test Pin 93 and Test
Pins 24, 103,91 and 97.
• DTC P0141=H02S heater (Rear)
(Heater ground) Test Pin 95 and Test
Pins 24, 103,91 and 97.
•
Is resistance greater than 10,000 ohms?
Yes
Go to next step.
No
SERVICE shorted circuit.
REMOVE breakout box.
RECONNECT all components.
RESET PCM to completely clear DTCs.
o ’ After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
0 1 -0 1 A -2 9
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...