Mazda MX-6 1998, Руководство по ремонту

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TROUBLESHOOTING [ENGINE CONTROL KL]
STEP INSPECTION
ACTION
2
PERFORM KEY ON ENGINE RUNNING
(KOER) SELF-TEST
• Key off.
• NGS tester connected.
• Disconnect fuel vapor hose from intake
manifold and plug fitting at intake manifold.
• Start engine and run at 2000 rpm for 5
minutes and return to idle.
• Perform KOER Self-Test.
• Are any heated oxygen sensor DTCs
P1127, P1131, P1132, P1151
or
P1152
present?
Yes If DTC P1127 is present:
Go to DTC(s) charts PROCEED as required.
DTCs P1131, P1130 or P1151, P1150:
Go to next step.
DTCs P1132, P1130 or P1152, P1150:
Go to step 9.
No For Continuous DTCs Only P1130, P1150, P0171,
P0174, P0172 and P0175:
Go to step 12.
If DTC(s) P1132 and/or P1152 are no longer present:
RECONNECT fuel vapor line.
Go to address evaporative emission purge solenoid valve
DTC (P0443).
All others:
Fault that produced DTC is an intermittent.
Check for poor connection or component malfunction
(SERVICE or REPLACE as necessary).
Go to ENGINE SYMPTOM TROUBLESHOOTING No. 27.
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
• 02S21
Note
• If spark occurs, remove jumper and go to
step 7 (check fuse in 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 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.
01-01B-37