Mazda MX-6 1998, Руководство по ремонту

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TROUBLESHOOTING [ENGINE CONTROL KL]
STEP INSPECTION
ACTION
12 CHECK EGR BOOST SOLENOID VALVE
CIRCUIT FOR SHORT TO POWER AND
SHORT TO GROUND
• EGR boost solenoid valve disconnected.
• Breakout box installed.
• Measure resistance between Test Pin 98
and Test Pins 71, 97 and 90 at breakout
box.
• Measure resistance between Test Pin 98
and Test Pins 51, 103 and 91 at breakout
box.
• Is each resistance greater than 10,000
ohms?
Yes REMOVE breakout box.
RECONNECT all components.
Go to next step.
No
SERVICE short in EGR boost solenoid valve harness
circuit.
REMOVE breakout box.
RECONNECT all components.
RESET PCM to completely clear DTCs.
t
t
After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
13
CHECK OPERATION OF EGR BOOST
SOLENOID VALVE
• Key off.
• Breakout box installed. PCM connected.
• Disconnect vacuum line from EGR boost
solenoid valve to intake manifold vacuum
at EGR boost solenoid valve.
• Install vacuum pump at input port of EGR
boost solenoid valve and apply -2 7 ------33
kPa {-2 0 3 ----- 247 mmHg, - 8 ------10 InHg}
of vacuum.
• Disconnect vacuum line from EGR boost
sensor solenoid valve to EGR boost sensor
at EGR boost sensor. Inspect vacuum line
for damage, service as necessary.
• Install vacuum gauge at unattached end of
vacuum line.
• Key on.
• Jumper Test Pin 98 to ground at breakout
box and observe vacuum gauge. Remove
jumper.
• Apply - 2 7 ------33 kPa {-2 0 3 ------247 mmHg,
-8 -— 10 inHg} of vacuum to EGR boost
solenoid valve once again.
• Again jum per Test Pin 98 to ground at
breakout box and observe vacuum gauge.
Remove jumper.
• Key off.
• Was vacuum signal indicated at any
time by vacuum gauge?
Yes Fault that produced DTC P0400 is intermittent, and cannot
be identified at this time.
REMOVE vacuum pump and gauge.
RECONNECT all vacuum lines.
Possible intermittent poor connection or component
malfunction. (SERVICE or REPLACE as necessary).
Go to SYMPTOM TROUBLESHOOTING No. 27.
No
REPLACE damaged EGR boost solenoid valve.
REMOVE breakout box.
REMOVE vacuum gauge and vacuum pump.
RECONNECT all components.
RESET PCM to completely clear DTCs.
cr After Repair Procedure
COMPLETE OBD II Drive Mode.
RERUN OBD Test.
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