TROUBLESHOOTING [ENGINE CONTROL FS]
STEP
INSPECTION
ACTION
6
Start the engine and run it at idle speed.
Turn A/C switch on.
Do condenser fan and cooling fan operate?
Yes
Go to next step.
No
If condenser fan does not operate, check following:
Condenser fan relay stuck open.
Condenser fan motor malfunction.
Condenser fan motor ground open.
Open circuit between condenser fan motor and relay.
Open circuit between condenser fan relay and PCM.
Open battery power circuit for condenser fan relay.
If cooling fan motor does not operate, check
following:
Cooling fan relay stuck to open.
Cooling fan motor malfunction.
Cooling fan motor ground open.
Open circuit between cooling fan motor and relay.
Open circuit between cooling fan relay and PCM.
Open battery power circuit for cooing fan relay.
7
Is drive belt okay?
Yes
Go to next step.
No
Replace drive belt.
8
Are there any leaks around heater unit in
Yes
Check and service heater unit for leaks.
passenger compartment?
No
Go to next step.
9
Are there any leaks at coolant hoses and/or
Yes
Replace malfunctioning part.
radiator?
No
Inspect engine block for leaks or blockage.
10
Verify test results. If okay, return to diagnostic index to service any additional symptoms.
18
COOLING SYSTEM CONCERNS RUNS COLD
DESCRIPTION
Engine takes excessive period for reaching normal operating temperature
POSSIBLE
CAUSE
• Thermostat malfunction
• Malfunction of cooling fan system
• Malfunction of condenser fan system
STEP
INSPECTION
ACTION
1
Is custom er’s any complaint “Lack of
Yes
Check A
1C
and heater system.
passenger compartment heat”?
No
Go to next step.
2
Does engine speed continue at fast idle?
Yes
Go to flowchart 8 for “FAST IDLE/RUNS ON".
No
Go to next step.
3
Connect NGS tester to DLC.
Access ECT V PID.
Start engine and record ECT voltage reading
every 60 seconds.
Note
• When ECT voltage reverses direction trend
or changes slightly (0.03 volt or less),
thermostat has opened.
Is thermostat opening voltage okay?
Yes
Check condenser fan and cooling fan operation.
If both or either fan operate abnormally, check follows:
• Cooling fan relay stuck to close.
• Condenser fan relay stuck to close.
• Short to ground between cooling fan relay and PCM.
• Short to ground between condenser fan relay and
PCM.
• Circuit between cooling fan relay and fan motor shorts
to battery supply line.
• Circuit between condenser fan relay and fan motor
shorts to battery supply line.
Thermostat operating voltage
Approx. 0.6— 0.9 V
No
Remove thermostat from engine and verify thermostat
operation.
If temperature gauge on instrument cluster indicates,
normal range but ECT V is not same as temperature
gauge reading check ECT sensor.
If temperature gauge on instrument cluster indicates range
cold but ECT voltage is normal, check temperature gauge
and heat gauge unit.
4
Verify test results. If okay, return to diagnostic index to service any additional symptoms.
01-01 A - 1 56
Содержание MX-6 1998
Страница 1: ......
Страница 501: ...STARTING SYSTEM 3 If not as specified replace the starter interlock switch 01 19 3...
Страница 803: ...MANUAL TRANSAXLE W 6 U 5 1 5 W A C 05 15 7...
Страница 934: ...CONTROL SYSTEM CONTROL SYSTEM STRUCTURAL VIEW W6U740WA0 07 40 2...
Страница 983: ...SERVICE TOOLS 08 60 SERVICE TOOLS 08 RESTRAINTS S S T 08 60 1 08 RESTRAINTS SST 08 60 1...
Страница 1005: ...TROUBLESHOOTING POWER DOOR LOCK SYSTEM From previous page Go to next page W 6 U 9 0 1 W H 3 09 01E 7...
Страница 1168: ...SEATS 4A 4 If not as specified replace the power seat switch 2A 2B t 4B 3A 1C 1A 1F W6U913WA9 09 13 7...