Mazda MX-6 1998, Руководство по ремонту

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TROUBLESHOOTING [ENGINE CONTROL FS]
STEP INSPECTION
ACTION
7
CHECK CMP SIGNAL CIRCUIT FOR SHORT
TO GND OR PCM GROUND (BETWEEN
PCM AND CMP SENSOR GROUND
CIRCUIT)
• Key off.
• Breakout box installed.
• CMP sensor disconnected.
• Disconnect NGS tester from DLC.
• Measure resistance between Test Pin 85
and Test Pins 51, 103 and 91.
• Is each resistance greater than 10,000
ohms?
Yes Go to next step.
No SERVICE CMP signal circuit for short to ground or PCM
ground.
REMOVE breakout box.
RECONNECT all components.
RERUN OBD Test.
8 CHECK FOR SHORTS IN PCM
• Key off.
• CMP sensor disconnected.
• Breakout box installed.
• Measure resistance between Test Pin 85
and Test Pins 51, 103, 71, 97, 91 at
breakout box.
• Is each resistance greater than 500
ohms?
Yes
Go to next step.
No REPLACE PCM.
REMOVE breakout box.
RECONNECT all components.
RERUN OBD Test.
9 CHECK CMP SENSOR OUTPUT
• Key off.
• Breakout box installed. PCM connected.
• Reconnect CMP sensor.
• Set voltmeter to AC (to monitor less than
5.0 volts).
• Measure voltage between Test Pin 85 and
Test Pins 51 and 103 at breakout box while
running engine at varying rpm.
• Does AC voltage vary greater than 0.1
volt AC?
Yes REPLACE PCM.
REMOVE breakout box.
RECONNECT all components.
RERUN OBD Test.
No REPLACE CMP sensor.
REMOVE breakout box.
RECONNECT all components.
RERUN OBD Test.
01-01A-53