TROUBLESHOOTING
NO.16 COOLING SYSTEM CONCERNS— OVERHEATING
16
Cooling system concerns overheating
DESCRIPTION
Engine runs at higher than normal temperature/Overheats.
POSSIBLE
CAUSE
Improper coolant level
Blown fuses
Coolant leakage
Excessive A/C system pressure
Improper water/anti-freeze mixture
Fans reverse rotation
Poor radiator condition
Thermostat malfunction
Radiator hoses damage
Condenser fan is inoperative.
Improper or damaged radiator cap
Main cooling fan is inoperative.
Coolant overflow system malfunction
Improper tension of drive belt
Drive belt damage_______________
Diagnostic Procedure
STEP
INSPECTION
RESULTS
ACTION
1
Inspect following:
• Engine coolant level
• Coolant leakage
• Water and anti-freeze mixture
• Radiator condition
• Collapsed or restricted radiator hoses
• Radiator pressure cap
• Overflow system
• Fan rotational direction
• Fuses
Are all items okay?
Yes
Go to next step.
No
Service as necessary.
Repeat Step 1.
2
Connect NGS tester to DLC.
Turn ignition switch on.
Retrieve any DTC.
Is any DTC displayed?
Yes
No DTC
is displayed:
Go to next step.
No
DTC
is displayed:
Go to appropriate DTC test.
3
Start engine and run it at idle speed.
Turn A/C switch on.
Does A/C compressor engage?
Yes
Go to Step 5.
No
Inspect following and repair or replace as
necessary:
• Refrigerant charging amount
• Open circuit between A/C relay and PCM
terminal 69 (for GF4A-EL models) or 96
(except for GF4A-EL models)
• Seized A/C magnetic clutch
• A/C magnetic clutch malfunction
If all items are okay, go to next step.
4
Connect NGS tester to DLC.
Access AC S/W or ACCS PID on NGS tester.
Start engine and run it at idle speed.
Turn A/C switch on.
Does AC S/W or ACCS PID read on?
Yes
Go to next step.
No
Inspect for following:
• Refrigerant pressure switch operation
• A/C switch is stuck open.
• Open or short circuit between refrigerant
pressure switch and PCM terminal 41
• Open circuit of blower motor fan switch and
resistor (if blower motor does not operate)
• Evaporator temperature sensor and A/C
amplifier
F1-133
Summary of Contents for 626 Station Wagon
Page 25: ...CONTROL SYSTEM WIRING DIAGRAM With Immobilizer System OUTLINE F1 4 ...
Page 183: ...CONTROL SYSTEM COMPONENT LOCATION F2 7 ...
Page 204: ...MANUAL TRANSAXLE FEATURES OUTLINE J 2 OUTLINE OF CONSTRUCTION J 2 SPECIFICATIONS J 2 D J 1 ...
Page 266: ...SHIFT MECHANISM 6 Apply grease to the cam as shown K2 59 ...
Page 418: ...TROUBLESHOOTING KEYLESS ENTRY SYSTEM ON BOARD DIAGNOSTIC FUNCTION S 37 ...
Page 454: ...WARNING AND INDICATOR SYSTEM O p e ra tin g O rd e r T 32 ...