Mazda MX-6 1998, Workshop Manual

Page: 317 / 1282

TROUBLESHOOTING [ENGINE CONTROL KL]
CONTINUOUS P1460
DTC
Wide open throttle air conditioning cutoff circuit malfunction
DESCRIPTION
• Continuous Memory DTC P1460 indicates A/C relay primary circuit fault has ocuured
during vehicle operation
[Possible Cause]
• Open in ignition switch to A/C relay coil circuit
STEP INSPECTION
ACTION
1
CHECK A/C RELAY COIL CIRCUIT FOR
SHORT TO GROUND
• Key off.
• NGS tester connected.
• Disconnect A/C low pressure switch.
• Install jum per wire in A/C low pressure
switch vehicle harness connector, (to
complete circuit)
• Key on, engine off.
• A/C switch ON.
• Check A/C relay coil circuit short to ground
while performing following:
• Shake, wiggle, bend A/C coil circuit
between PCM terminal 69 and A/C relay.
• Lightly tap on A/C relay (to simulate road
shock).
• Is fault indicated?
Yes ISOLATE fault and SERVICE as necessary.
REMOVE jum per wire.
RECONNECT all components.
RESET PCM completely clear DTCs.
w After Repair Procedure
START engine.
TURN A/C to ON.
WAIT 15 seconds.
A/C off.
Key off.
RERUN OBD Test.
No Go to next step.
2 CHECK A/C RELAY COIL CIRCUIT FOR
OPEN TO POWER
• Key on, engine off.
• Jumper wire installed in A/C low pressure
switch.
• A /C O N .
• NGS tester connected.
• Access Output Test Mode on NGS tester.
• Turn output ON.
• Check A/C relay coil circuit for open in
power circuit or ignition switch circuit
performing following:
• Shake, wiggle, bend A/C coil circuit
between PCM terminal 69 and A/C relay.
• Shake, wiggle, bend power circuit or
ignition switch circuit to A/C relay.
• Lightly tap on A/C relay (to simulate road
shock).
• Key off, A/C off.
•
Is fault indicated?
Yes
ISOLATE fault and SERVICE as necessary.
REMOVE jum per wire.
RECONNECT all components.
RESET PCM completely clear DTCs.
c r After Repair Procedure
START engine.
TURN A/C to ON.
WAIT 15 seconds.
A/C off.
Key off.
RERUN OBD Test.
No Go to ENGINE SYMPTOM TROUBLESHOOTING No. 27.
0 1-01B -111