Mazda CX 7. Manual — part 113
COOLING SYSTEM [L3 WITH TC]
01-12–7
01-12
COOLING SYSTEM CAP INSPECTION[L3 WITH TC]
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Warning
• Never remove the cooling system cap or loosen the radiator drain plug while the engine is
running, or when the engine and radiator are hot. Scalding engine coolant and steam may shoot
out and cause serious injury. It may also damage the engine and cooling system.
• Turn off the engine and wait until it is cool. Even then, be very careful when removing the cap.
Wrap a thick cloth around it and slowly turn it counterclockwise to the first stop. Step back while
the pressure escapes.
• When you are sure all the pressure is gone, press down on the cap using the cloth, turn it, and
remove it.
1. Clean the cooling system cap and the sealed part.
2. Inspect the cooling system cap for cracks or everted seal.
• If there is any malfunction, replace the cooling system cap.
3. Attach the cooling system cap to the SST and a
radiator cap tester.
4. Hold the cooling system cap downward and apply
pressure gradually. Verify that the pressure is held
stable for 10 s.
• If the pressure is not held stable, replace the
cooling system cap.
Cooling system cap valve opening pressure
112.8— 142.2 kPa {1.15— 1.45 kgf/cm
2
,
16.4— 20.6 psi}
End Of Sie
COOLANT RESERVE TANK REMOVAL/INSTALLATION[L3 WITH TC]
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1. Remove the charge air cooler duct. (See 01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH
TC].)
2. Remove in the order indicated in the table.
3. Install in the reverse order of removal..
COOLING SYSTEM CAP
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1
Wiring harness
2
Hose
3
Coolant reserve tank
(See 01-12-8 Coolant Reserve Tank Removal Note.)
A
3
1
2
A
A
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COOLING SYSTEM [L3 WITH TC]
01-12–8
Coolant Reserve Tank Removal Note
1. Remove the coolant reserve tank from the
radiator cowling tabs shown in the figure by lifting
them with a flathead screwdriver.
End Of Sie
RADIATOR REMOVAL/INSTALLATION[L3 WITH TC]
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Warning
• Never remove the cooling system cap or loosen the radiator drain plug while the engine is
running, or when the engine and radiator are hot. Scalding engine coolant and steam may shoot
out and cause serious injury. It may also damage the engine and cooling system.
• Turn off the engine and wait until it is cool. Even then, be very careful when removing the cap.
Wrap a thick cloth around it and slowly turn it counterclockwise to the first stop. Step back while
the pressure escapes.
• When you are sure all the pressure is gone, press down on the cap using the cloth, turn it, and
remove it.
1. Disconnect the negative battery cable.
2. Drain the engine coolant. (See 01-12-5 ENGINE COOLANT REPLACEMENT[L3 WITH TC].)
3. Remove the charge air cooler duct, air cleaner and fresh air duct component. (See 01-13-5 INTAKE AIR
SYSTEM REMOVAL/INSTALLATION[L3 WITH TC].)
4. Remove the coolant reserve tank. (See 01-12-7 COOLANT RESERVE TANK REMOVAL/INSTALLATION[L3
WITH TC].)
5. Remove the dipstick pipe. (See 01-11-6 OIL PAN REMOVAL/INSTALLATION[L3 WITH TC].)
6. Remove the cooling fan component. (See 01-12-12 FAN MOTOR REMOVAL/INSTALLATION[L3 WITH TC].)
7. Remove the under cover.
8. Disconnect the ATF oil cooler hose from the radiator.
9. Remove in the order indicated in the table.
10. Install in the reverse order of the removal.
11. Refill the engine coolant. (See 01-12-5 ENGINE COOLANT REPLACEMENT[L3 WITH TC].)
12. Inspect for engine coolant leakage. (See 01-12-6 ENGINE COOLANT LEAKAGE INSPECTION[L3 WITH TC].)
13. Inspect the ATF level. (See 05-17-10 AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION[AW6A-EL,
AW6AX-EL].)
TAB
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01-02
ON-BOARD DIAGNOSTIC [L3 WITH TC]
2007 Mazda CX-7 Workshop Manual (1871–1U–06B)
01-02–9
Simulation Function Procedure
1. Connect the M-MDS to the DLC-2.
2. After the vehicle is identified, select the following
items from the initial screen of the M-MDS.
• When using the IDS (notebook PC)
1. Select the “Toolbox” tab.
2. Select “DataLogger”.
3. Select “Module”.
4. Select “PCM”.
• When using the PDS (pocket PC)
1. Select “Module Tests”.
2. Select “PCM”.
3. Select “DataLogger”.
3. Select the simulation items from the PID table.
4. Perform the simulation function, inspect the
operations for each parts.
• If there is no operation sound from the relay, motor, and solenoid after the simulation function inspection is
performed, it is possible that there is an open or short circuit in the wiring harness, relay, motor or solenoid,
or sticking and operation malfunction.
End Of Sie
DIAGNOSTIC MONITORING TEST RESULTS[L3 WITH TC]
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• The purpose of this test mode is to confirm the result of the OBD-II monitor diagnostic test results. The result
values stored when a particular monitor is completed are displayed. If the monitor is not completed, the initial
value is displayed.
*1
: California emission regulation applicable model
End Of Sie
DLC-2
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TEST ID
Description
Related system
10: 01: 80
HO2S (Front) lean-to-rich response time (calculated)
HO2S
10: 02: 03
Low HO2S (Rear) voltage for switch time calculation (constant)
10: 02: 04
High HO2S (Rear) voltage for switch time calculation (constant)
10: 02: 05
HO2S (Rear) rich-to-lean response time (calculated)
10: 21: 80
Front and HO2S (Rear) switching time ratio
Catalyst
10: 31: 83
EGR pressure variation
EGR
10: 3A: 80
EVAP system leak detection pump gross leak check
EVAP
10: 3B: 80
EVAP system leak detection pump small leak check
10: 3C: 80
*1
EVAP system leak detection pump very small leak check
10: 3D: 80
Purge flow monitor
10: A2: 0B
EWMA misfire counts for last 10 driving cycles
Misfire
10: A2: 0C
Misfire counts for last/current driving cycles
10: A3: 0B
EWMA misfire counts for last 10 driving cycles
10: A3: 0C
Misfire counts for last/current driving cycles
10: A4: 0B
EWMA misfire counts for last 10 driving cycles
10: A4: 0C
Misfire counts for last/current driving cycles
10: A5: 0B
EWMA misfire counts for last 10 driving cycles
10: A5: 0C
Misfire counts for last/current driving cycles
10: E1: 80
Heat radiation ratio
Engine cooling
system
10: E1: 81
Misfire counts for last/current driving cycles
ON-BOARD DIAGNOSTIC [L3 WITH TC]
2007 Mazda CX-7 Workshop Manual (1871–1U–06B)
01-02–10
Revised 3/2007 (Ref. No. R051/07)
AFTER REPAIR PROCEDURE[L3 WITH TC]
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1. Connect the M-MDS to the DLC-2.
2. Cycle the ignition switch from the off to the ON
position.
3. Any retrieved DTCs.
4. Clear all diagnostic data using the M-MDS.
End Of Sie
KOEO/KOER SELF TEST[L3 WITH TC]
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Note
• Perform a KOER self test with the engine idling after the engine speed increases to 2,000 rpm.
1. Perform the necessary vehicle preparation and visual inspection.
2. Connect the M-MDS to the vehicle DLC-2 16-pin connector located in the driver compartment.
3. Retrieve the KOEO/KOER DTCs using the M-MDS.
End Of Sie
OBD-II DRIVE MODE[L3 WITH TC]
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• Using the OBD-II drive mode, the monitoring item requested by OBD-II regulations can be easily diagnosed.
• Performing the Drive Mode inspects the OBD-II system for proper operation and must be performed to ensure
that no additional DTCs are present.
• The OBD-II drive mode is divided into the specific drive mode and single drive mode.
• For the specific drive mode, specified drive modes have been set for each individual monitoring item requested
by OBD-II regulations, and they can be diagnosed individually. For the single drive mode, the entire monitoring
item requested by OBD-II regulations can be diagnosed.
• The following modes are in the specific drive mode. The applicable system is diagnosed by driving in the
following drive modes.
— PCM Adaptive Memory Produce Drive Mode
— EGR System Repair Verification Drive Mode
— HO2S heater, HO2S, and TWC Repair Verification Drive Mode
— EVAP System Repair Verification Drive Mode
• The following systems are diagnosed with the single drive mode.
— EGR system
— Oxygen sensor (HO2S)
— Oxygen sensor heater
— Catalytic converter (TWC)
— Fuel, misfire and evaporative (EVAP) system
Caution
• While performing the Drive Mode, always operate the vehicle in a safe and lawful manner.
• When the M-MDS is used to observe monitor system status while driving, be sure to have another
technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD
function and inspect later.
Note
• Vehicle speed and engine speed detected by the PCM may differ from that indicated by the speedometer
and tachometer. Use the M-MDS to monitor vehicle speed.
• If the OBD-II system inspection is not completed during the Drive Mode, the following causes are
considered:
— The OBD-II system detects the malfunction.
— The Drive Mode procedure is not completed correctly.
• Disconnecting the battery will reset the memory. Do not disconnect the battery during and after Drive
Mode.
• The M-MDS can be used at anytime through the course of the Drive Mode to monitor the completion
status. Monitoring can be done by viewing the ON BOARD SYSTEM READINESS menu.
• The OBD monitoring status can be confirmed with the ignition switch operation. During KOEO, the MIL
illuminates for a fail-light inspection for approx. 17 s. The OBD monitoring status is confirmed after the
fail-light inspection.
— If all of the diagnosis is completed even one time, the MIL will continue to illuminate.
— If all of the diagnosis is not completed, the MIL flashes for approx. 7 s, and then it illuminates until the
engine is started.
DLC-2
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