Symptom Troubleshooting - Engine - (MZI-3.7): Other Mazda CX-9 I

NO. 1 MELTING OF MAIN OR OTHER FUSES [MZI-3.7]

TROUBLESHOOTING HINTS - NO. 1 MELTING OF MAIN OR OTHER FUSES 1 MELTING OF MAIN OR OTHER FUSES [TROUBLESHOOTING HINTS] Inspect condition of fuse

Scheme 17

TROUBLESHOOTING HINTS FOR FUSES

NO. 2 MIL ILLUMINATES [MZI-3.7]

NO. 2 MIL ILLUMINATES (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 3 WILL NOT CRANK [MZI-3.7]

NO. 3 WILL NOT CRANK (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK [MZI-3.7]

NO. 4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 5 ENGINE STALLS-AFTER START/AT IDLE [MZI-3.7]

NO. 5 ENGINE STALLS-AFTER START/AT IDLE (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 6 CRANKS NORMALLY BUT WILL NOT START [MZI-3.7]

NO. 6 CRANKS NORMALLY BUT WILL NOT START (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 7 SLOW RETURN TO IDLE [MZI-3.7]

NO. 7 SLOW RETURN TO IDLE (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 8 ENGINE RUNS ROUGH/ROLLING IDLE [MZI-3.7]

NO. 8 ENGINE RUNS ROUGH/ROLLING IDLE (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 9 FAST IDLE/RUNS ON [MZI-3.7]

NO. 9 FAST IDLE/RUNS ON (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 10 LOW IDLE/STALLS DURING DECELERATION [MZI-3.7]

NO. 10 LOW IDLE/STALLS DURING DECELERATION (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES [MZI-3.7]

NO. 11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [MZI-3.7]

NO. 12 LACK/LOSS OF POWER-ACCELERATION/CRUISE (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 13 KNOCKING/PINGING-ACCELERATION/CRUISE [MZI-3.7]

NO. 13 KNOCKING/PINGING-ACCELERATION/CRUISE (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 14 POOR FUEL ECONOMY [MZI-3.7]

NO. 14 POOR FUEL ECONOMY (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 15 EMISSION COMPLIANCE [MZI-3.7]

NO. 15 EMISSION COMPLIANCE (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 16 HIGH OIL CONSUMPTION/LEAKAGE [MZI-3.7]

NO. 16 HIGH OIL CONSUMPTION/LEAKAGE (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 17 COOLING SYSTEM CONCERNS-OVERHEATING [MZI-3.7]

NO. 17 COOLING SYSTEM CONCERNS-OVERHEATING (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

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

NO. 19 EXHAUST SMOKE [MZI-3.7]

NO. 19 EXHAUST SMOKE (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 20 FUEL ODOR (IN ENGINE COMPARTMENT) [MZI-3.7]

NO. 20 FUEL ODOR (IN ENGINE COMPARTMENT) (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 23 A/C DOES NOT WORK SUFFICIENTLY [MZI-3.7]

NO. 23 A/C DOES NOT WORK SUFFICIENTLY (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [MZI-3.7]

NO. 24 A/C ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 25 A/C DOES NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS [MZI-3.7]

NO. 25 A/C DOES NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 26 EXHAUST SULPHUR SMELL [MZI-3.7]S

NO. 26 EXHAUST SULPHUR SMELL (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 28 FUEL FILLING SHUT OFF CONCERNS [MZI-3.7]

NO. 28 FUEL FILLING SHUT OFF CONCERNS (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

NO. 29 SPARK PLUG CONDITION [MZI-3.7]

NO. 29 SPARK PLUG CONDITION (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

Water Sprinkling Method

If malfunction occurs only under high humidity or rainy/snowy weather, perform the following steps

Scheme 18

1. Connect the M-MDS to the DLC-2 if you are inspecting sensors or switches.
2. Turn the ignition switch to the ON position (Engine off). NOTE: If the engine starts and runs, perform the following steps at idle.
3. Access PIDs for sensor or switch if you are inspecting sensors or switches.
4. If you are inspecting the switch, turn it on manually.
5. Spray water onto the vehicle or run it through a car wash. If PID value is unstable or malfunction occurs, repair or replace part if necessary.

Finding Irregular Signals

While referring to, use the PID/DATA monitor and record function to inspect the input signal system relating to the problem.

1. Start the engine and idle the vehicle. You can assume that any signals that are out of specification by a wide margin are irregular.
2. When recreating the problem, any sudden change in monitor input signals that is not intentionally created by the driver can be determined as irregular.

Locating The Source Of Unusual Signals

Scheme 19

Cooling Fans Do Not Operate

1. Open circuit between the fan control module and the cooling fan relay
2. Open circuit between fan control module and ground
3. Poor connection of the fan control module connector
4. Fan control module See «FAN CONTROL MODULE INSPECTION [MZI-3.7]»(ref-345349-S37600518762009102000000) .

Cooling Fan Motor No. 1 Does Not Operate

1. Open or short to ground circuit between the fan control module and cooling fan motor No. 1
2. Poor connection of the fan control module connector or cooling fan motor No. 1 connector
3. Cooling fan motor No. 1 See «FAN MOTOR INSPECTION [MZI-3.7]»(ref-345349-S13027118752009102000000) .
4. Fan control module See «FAN CONTROL MODULE INSPECTION [MZI-3.7]»(ref-345349-S37600518762009102000000) .

Cooling Fan Motor No. 2 Does Not Operate

1. Open or short to ground circuit between the fan control module and the cooling fan motor No. 2
2. Poor connection of the fan control module connector or the cooling fan motor No. 1 connector
3. Cooling fan motor No. 2 See «FAN MOTOR INSPECTION [MZI-3.7]»(ref-345349-S13027118752009102000000) .
4. Fan control module See «FAN CONTROL MODULE INSPECTION [MZI-3.7]»(ref-345349-S37600518762009102000000) .

When Idling Cannot Be Continued

Note. Inspect for each bank

1. Remove the OCV and verify that the spool valve is at maximum retard position. If the spool valve is stuck in advance direction, replace the OCV. See «OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [MZI-3.7]»(ref-345346-S09547497922009102000000) .
2. Connect the OCV.
3. Turn the ignition switch to ON position.
4. Verify that the spool valve is at max. retard position. If the spool valve is stuck in advance direction, inspect the following: Short circuit in harnesses or connectors between the OCV and the PCM.
5. Inspect the variable valve timing actuator.

For Right Bank

1. Disconnect OCV (RH) connector.
2. Warm up the engine and it at idle.
3. Apply the battery voltage to the OCV and verify that the engine idles roughly or stalls. If the engine idles roughly or stalls, inspect the timing belt component (valve timing deviation). If the engine does not idle roughly or stall, go to the next step.
4. Remove the OCV (RH) and perform spool valve operation inspection. See «OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [MZI-3.7]»(ref-345346-S09547497922009102000000) . If not as specified, inspect the following: OCV (RH) Harnesses and connectors between OCV (RH) and PCM have an open or short circuit. If as specified, inspect the following right bank hydraulic passages for clogging or leakage, or both. Oil pressure switch - OCV OCV - camshaft Camshaft internal passage
5. If they are normal, replace the right bank camshaft pulley (with built-in variable valve timing actuator).

For Left Bank

1. Disconnect OCV (LH) connector.
2. Warm up the engine to idle.
3. Apply the battery voltage to the OCV and verify that the engine idles roughly or stalls. If the engine idles roughly or stalls, inspect the timing belt component (valve timing deviation). If the engine does not idle roughly or stall, go to the next step.
4. Remove the OCV (LH) and perform spool valve operation inspection. See «OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [MZI-3.7]»(ref-345346-S09547497922009102000000) . If not as specified, inspect the following: OCV (LH) Harnesses and connectors between OCV (LH) and PCM have an open or short circuit. If as specified, inspect the following left bank hydraulic passages for clogging or leakage or both. Oil pressure switch - OCV OCV - camshaft Camshaft internal passage
5. If they are normal, replace the left bank camshaft pulley (with built-in variable valve timing actuator).

EVAP System Malfunction Judgment

1. M-MDS detect the small/large leak or blockage based on fuel tank pressure at the end of EVAP Test. The EVAP Test could not obtain the target vacuum. A large leak or blockage is suspect. This judgment means tank pressure could not arrive at target pressure at stage 1 test. Check for the large leakage or inspect the purge solenoid valve operation and related hoses. Repair or replace any malfunctioning parts. The EVAP Test could not maintain the target vacuum. A small leak is suspect. This judgment means tank pressure could not stay in target pressure at stage 2 test. Run the EVAP Test again after Re-tighten the fuel filler cap. If small leak is suspected again, use the leak tester or ultrasonic leak detector for identify the leak point. Repair or replace any malfunctioning parts. Blockage in EVAP system. This judgment means tank pressure could not return to atmosphere at stage 3 test. Inspect the CV solenoid, Air filter, Charcoal canister and related hoses for blockage. No large leaks or blockage have been detected in the EVAP system at this time. M-MDS can not detect "VERY SMALL LEAK". To identify the leak point, please use the leak tester or ultrasonic leak detector.

Scheme 20

1. Verify that all PIDs within the following specifications. NOTE: To successfully perform this procedure, all PIDs must be within the specifications before proceeding to the next step.
2. Select the following items from the initialization screen of the M-MDS. Select the "Powertrain". Select the "Fuel". Select the "EVAP Test". Verify that ECT and IAT are within the specifications at the confirmation screen. To successfully perform this procedure, ECT and IAT must be within the spec before proceeding to the next step. Fuel Level must be maintained within 15%-85%. PCM will cancel the EVAP Test If the Fuel Level is lower than 15% or higher than 85%.
3. Verify the test results described on the M-MDS and follow the instructions.

Scheme 21

Scheme 22

1. Perform the following SST (EVAP System Tester 134-01049) self-test: NOTE: If the tester does not work correctly during the self-test, refer to the tester operators information for a more detailed self-test procedure. Verify that the control valve on the panel is in the HOLD position then open the nitrogen bottle valve. Connect the vehicle interface hose (part of the SST ) to the SELF-TEST port located on the control panel. Hand tighten the fitting. (Do not overtighten. Turn the control valve to the TEST position. The gauge should read 331-381 mm {13-15 in} of water. If the gauge is not reading in this range, adjust the pressure by turning the black knob on the low pressure regulator at the nitrogen bottle. Turn the control valve to the HOLD position. Verify that the gauge holds pressure and that the flow meter reads no flow. If there is no drop in pressure and no flow, the tester passes the self-test. If the gauge leaks down, refer to the tester operators service information.
2. Connect the SST to the vehicle. Verify that the control valve on the panel is in the HOLD position then open the nitrogen bottle valve. Remove the fuel-filler cap from the vehicle. If the fuel-filler cap is not a MAZDA part or equivalent, replace it. NOTE: INSPECT FUEL FILLER CAP AND FILLER NECK Visually inspect for damage, insufficient sealing, rust, cracks or warps for filler cap and filler neck. Repair or replace if necessary. Connect the receiver assembly ( SST: 134-01059) to the vehicle cap test hose assembly (part of the SST ) and the fuel-filler cap from the vehicle. Connect the cap adaptor ( SST: 134-01058) to the vehicle cap test hose assembly (part of the SST ) and to the fuel-filler neck. Connect the vehicle interface hose (part of the SST ) to the center fitting of the vehicle cap test hose assembly (part of the SST ).
3. Connect the M-MDS to the DLC-2.
4. Turn the ignition switch to the ON position (Engine off).
5. Request the PCM on-board device control (Mode 08) using the M-MDS to close the canister vent value. NOTE: The canister vent value is closed for 10 min unless the following any actions are done: The engine is started. The ignition switch is turned off position.
6. Make sure the control valve on the 134-01049 is in the HOLD position and that the valve on the cylinder of nitrogen gas is open.
7. Turn the control valve to the open position and let the system fill. You should note a drop in the gauge pressure along with the flow meter being pegged at maximum flow for several minutes depending on how full or empty the fuel tank is, and how long it takes to completely fill and pressurize the evaporative emissions system hoses.
8. If the gauge and the flow meter do not settle to a measurable level after 2-3 min, then refer to the Mazda Workshop Service Information to verify that the canister vent valve is properly closed. If canister vent valve is properly closed. The EVAP system has large leakage. Check for leakage and repair as necessary.
9. Verify the pressure gauge and flow meter reading to determine if there is an evaporative emissions leak: NO EVAPORATIVE LEAK: The flow meter registers "zero flow" and the pressure gauge returns to the pre-set pressure of 356 mm {14 in} of water (H2O). EVAPORATIVE LEAK: The pressure does not return to the preset level of 356 mm {14 in} of water (H2O) when measuring the flow. See "SETTING LEAK STANDARD FOR TESTING" (.020 to .040 inch H2O) of the Evaporative Emissions Tester operators service information (134-01067). NOTE: Turn the control valve to the HOLD position then disconnect the SST.