TROUBLESHOOTING [ENGINE CONTROL FS]
STEP
INSPECTION
ACTION
40
CHECK HEATED OXYGEN SENSOR
ABILITY TO GENERATE A VOLTAGE
GREATER THAN 0.5 VOLT
Note
• Any vacuum or air leaks can cause DTCs
P1131, and P1130.
Possible cause:
• Leaking vacuum actuators.
• Engine sealing (Intake and
IAC).
• EGR system (valve).
• PCV system (hose and valve).
• Unmetered air leaks between throttle
body and MAF sensor assembly.
• Silicone contaminated heated oxygen
sensor.
• Key off.
• Inspect heated oxygen sensor harness for
chafing, burned out wires or other damage
and service as necessary.
• Disconnect suspected heated oxygen
sensor from vehicle harness.
• Connect digital multimeter to heated
oxygen sensor signal and heated oxygen
sensor ground or heated oxygen sensor
ground at sensor connector.
• Run engine at 2,000 rpm for three minutes.
• Rerun KOER Self-Test and monitor heated
oxygen sensor voltage.
•
Is voltage greater than
0.5
volt during or
at the end of self-test?
Yes
Go to step 43.
No
REPLACE heated oxygen sensor.
RESET PCM to completely clear DTCs.
o - After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
41
ATTEMPT TO GENERATE DTC P1131
• Key off.
• Disconnect heated oxygen sensor.
• Jumper heated oxygen sensor signal at
heated oxygen sensor harness vehicle
connector to battery negative post.
• Activate Key On Engine Running (KOER)
self-test.
•
Are DTCs P1131 present?
Yes
REMOVE jumper.
Go to next step.
No
REMOVE jumper.
RECONNECT heated oxygen sensor.
DISCONNECT PCM.
INSPECT both ends of connector for damaged or pushed
out pins, moisture, corrosion, loose pins and SERVICE as
necessary.
If okay, REPLACE PCM.
RERUN KOER Self-test.
42
HEATED OXYGEN SENSOR CHECK
• Key off.
• Disconnect suspected heated oxygen
sensor.
• Connect digital multimeter to heated
oxygen sensor signal circuit and heated
oxygen sensor ground at sensor connector.
• Disconnect vacuum hose from vacuum
tree.
• Start engine and run at 2,000 rpm.
• Does voltage reading indicate less than
0.4
volt within
30
seconds?
Yes
RECONNECT vacuum hose and heated oxygen sensor.
Go to next step.
No
REPLACE heated oxygen sensor.
RECONNECT vacuum hose.
RESET PCM to completely clear DTCs.
¡nr After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
0 1 -0 1 A -4 4
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...