Mazda MX-6 1998, Workshop Manual

Page: 698 / 1282

TROUBLESHOOTING [LA4A-EL]
STEP INSPECTION ACTION
E2 CHECK ELECTRICAL SIGNAL OPERATION
Caution
• Removing the solenoid body connector by
prying with a screwdriver will damage the
connector. Remove the solenoid body
connector by pushing on the wire tab and
pulling on the wiring harness.
• Disconnect solenoid body connector.
• Using a mirror, inspect both ends of the
connector for damaged or pushed out pins,
corrosion, loose wires, and missing or
damaged seals.
• Refer to connector schematic and table of
solenoid body.
a? Solenoid Body Connector Compoent
• Connect volt-ohm meter (VOM)/digital volt-ohm
meter (DVOM) positive test lead to power
circuit and negative test lead to the EPC
solenoid circuit of the transaxle vehicle
harness connector.
• VOM/DVOM ON 20 Volt scale.
• W hile observing DVOM, cycle solenoid output
ON and OFF.
• Does the EPC solenoid output voltage change
at least 0.5 volt?
Yes Go to E5.
No Go to next step.
E3
CHECK CONTINUITY OF SOLENOID SIGNAL
AND POWER CIRCUIT HARNESS CIRCUIT
• Key off.
• Disconnect PCM. Inspect for damaged or
pushed out pins, corrosion, loose wires, etc.
• Install breakout box, leave PCM disconnected.
• Refer to connector schematic and table of the
solenoid body.
ay Solenoid Body Connector Component
• Measure resistance between PCM test pin
(71/97) at breakout box and EPC power circuit
at the solenoid body connector.
• Measure resistance between PCM test pin 81
at the breakout box and EPC solenoid signal
pin at the solenoid body connector.
• Is each resistance less than 5.0 ohms?
Yes Go to next step.
No
Service open circuit.
Remove breakout box.
Reconnect all components.
Erase diagnostic trouble codes (DTCs) and rerun OBD
test.
E4 CHECK HARNESS FOR SHORT TO POWER
OR GROUND
• Key off.
• Breakout box installed, PCM disconnected.
• Solenoid body connector disconnected.
• Refer to connector schematic and table of the
solenoid body.
et
Solenoid Body Connector Component
• Measure resistance between EPC solenoid
circuit test pin 81 and test pin 71/97 at the
breakout box.
• Measure resistance between EPC solenoid
circuit test pin 81 and test pins 77/103, 91 at
the breakout box.
• Is each resistance greater than 10,000 ohms?
Yes Go to next step.
No Service short circuit.
Remove breakout box.
Reconnect all components.
Erase DTCs and rerun OBD test.
0 5 -0 1 A -2 3