Mazda CX-9 Grand Touring 2008, Руководство пользователя

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NO.18 COOLING SYSTEM CONCERNS-RUNS COLD [MZI-3.7]
NO.18 COOLING SYSTEM CONCERNS-RUNS COLD (MZI-3.7) DETECTION CONDITIONS AND
POSSIBLE CAUSES
5
(See ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-
3.7] .)
Does the cooling fan control system
function properly?
Yes Go to the next step.
No Repair or replace the malfunctioning part.
6 Is the drive belt normal?
Yes Go to the next step.
No Replace the drive belt.
7
Is there leakage around the heater unit in
passenger compartment?
Yes Inspect and service heater for leakage.
No Go to the next step.
8
Is there leakage at the coolant hoses and/or
radiator?
Yes Replace the malfunctioning part.
No Go to the next step.
9
Cool down the engine.
Remove thermostat and inspect operation.
(See
THERMOSTAT
REMOVAL/INSTALLATION [MZI-
3.7]
.)
(See THERMOSTAT INSPECTION
[MZI-3.7] .)
Is thermostat normal?
Yes
The engine coolant temperature and
thermostat are normal, inspect engine
block for leakage or blockage.
No
Access ECT PID.
Inspect for both ECT PID and temperature
gauge readings.
If temperature gauge on instrument cluster
indicates normal range but ECT PID is not
same as temperature gauge reading, inspect
CHT sensor.
If temperature gauge on instrument cluster
indicates overheating but ECT PID is
normal, inspect temperature gauge and heat
gauge unit.
10
z
Verify test results.
{
If normal, return to diagnostic index to service any additional symptoms.
(See SYMPTOM DIAGNOSTIC INDEX [MZI-3.7] .)
{
If malfunction remains, inspect related Service Bulletins and/or On-line Repair
Information and perform repair or diagnosis.
z
If vehicle is repaired, troubleshooting completed.
z
If vehicle is not repaired or additional diagnostic information is not available,
replace the PCM.
(See PCM REMOVAL/INSTALLATION [MZI-3.7] .)
18 COOLING SYSTEM CONCERNS-RUNS COLD
DESCRIPTION Engine takes excessive time to reach normal operating temperature.
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:10:05 AM Page 72 © 2005 Mitchell Repair Information Company, LLC.