Mazda MX-6 1998, Руководство по ремонту, Страница: 235 / 1282

TROUBLESHOOTING [ENGINE CONTROL KL]
STEP
INSPECTION ACTION
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 RH)
(heater GND) Test Pin 93 and Test Pins
2 4 ,1 0 3 ,9 1 and 97.
• DTC P0141=H02S heater (Middle)
(heater GND) Test Pin 95 and Test Pins
24, 103,91 and 97.
• DTC P0147=H02S heater (Rear)
(heater GND) Test Pin 96 and Test Pins
24, 103, 91 and 97.
• DTC P0155=H02S heater (Front LH)
(heater GND) Test Pin 94 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.
tr After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
8 CHECK FOR OPEN HEATED OXYGEN
SENSOR HEATER GROUND HARNESS
CIRCUIT
• Key off.
• Disconnect suspected sensor.
• Install breakout box, PCM disconnected.
• Use following list to measure resistance
between appropriate test pins at breakout
box and heated oxygen sensor heater
ground at vehicle harness connector.
• H 02S heater (Front RH)=Test Pin 93
(heater GND)
• H 02S heater (Middle)=Test Pin 95
(heater GND)
• H 02S heater (Front LH)=Test Pin 94
(heater GND)
• H 02S heater (Rear)=Test Pin 96 (heater
GND)
• Is resistance less than 4.0 ohms?
Yes Open or shorted or excessive resistance in heater circuit
in PCM.
REPLACE PCM.
REMOVE breakout box.
RECONNECT all components.
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
No SERVICE open or excessive resistance in heater circuit in
harness.
REMOVE breakout box.
RECONNECT all components.
RESET PCM to completely clear DTCs.
&• After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
01-01B-29