NO.7 ENGINE STALLS-AFTER START/AT IDLE [MZR-CD 2.2]

7	ENGINE STALLS—AFTER START/AT IDLE
DESCRIPTION	• Engine stops unexpectedly at idle and/or after start.
POSSIBLE CAUSE	• Poor fuel quality • No fuel in tank (PCM stores DTC P115B:00) • Intake-air system restriction or clogging • Engine overheating • A/C system improper operation • Immobilizer system (PATS) and/or circuit malfunction • Main relay malfunction • Glow system malfunction • Fuel warmer malfunction • Inadequate fuel pressure ― Fuel pressure sensor or related circuit malfunction ― Fuel pressure limiter malfunction (built-in common rail) ― Suction control valve control circuit malfunction (damaged to driver in PCM caused by short circuit to ground system) ― Suction control valve malfunction (built-in supply pump) ― Supply pump malfunction • Fuel leakage • Fuel line clogging or restriction • Fuel filter clogging or restriction • Incorrect fuel injection timing • Erratic signal from CKP sensor • Erratic signal from CMP sensor • Fuel injector malfunction • Low engine compression • Improper valve timing • Exhaust system and/or oxidation catalytic converter restriction or clogging • EGR system malfunction • ECT sensor or related circuit malfunction • APP sensor or related circuit malfunction • MAF/IAT sensor or related circuit malfunction • V-reference voltage supply circuit malfunction Warning The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: • Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. • Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injury or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete “BEFORE SERVICE PRECAUTION” and “AFTER SERVICE PRECAUTION” described in this manual. (See BEFORE SERVICE PRECAUTION [MZR-CD 2.2].) (See AFTER SERVICE PRECAUTION [MZR-CD 2.2].)

ENGINE STALLS—AFTER START/AT IDLE

DESCRIPTION

• Engine stops unexpectedly at idle and/or after start.

POSSIBLE CAUSE

• Poor fuel quality

• No fuel in tank (PCM stores DTC P115B:00)

• Intake-air system restriction or clogging

• Engine overheating

• A/C system improper operation

• Immobilizer system (PATS) and/or circuit malfunction

• Main relay malfunction

• Glow system malfunction

• Fuel warmer malfunction

• Inadequate fuel pressure

― Fuel pressure sensor or related circuit malfunction

― Fuel pressure limiter malfunction (built-in common rail)

― Suction control valve control circuit malfunction (damaged to driver in PCM caused by short circuit to ground system)

― Suction control valve malfunction (built-in supply pump)

― Supply pump malfunction

• Fuel leakage

• Fuel line clogging or restriction

• Fuel filter clogging or restriction

• Incorrect fuel injection timing

• Erratic signal from CKP sensor

• Erratic signal from CMP sensor

• Fuel injector malfunction

• Low engine compression

• Improper valve timing

• Exhaust system and/or oxidation catalytic converter restriction or clogging

• EGR system malfunction

• ECT sensor or related circuit malfunction

• APP sensor or related circuit malfunction

• MAF/IAT sensor or related circuit malfunction

• V-reference voltage supply circuit malfunction

Warning

The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:

• Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.

• Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injury or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete “BEFORE SERVICE PRECAUTION” and “AFTER SERVICE PRECAUTION” described in this manual. (See BEFORE SERVICE PRECAUTION [MZR-CD 2.2].) (See AFTER SERVICE PRECAUTION [MZR-CD 2.2].)

STEP	INSPECTION	RESULTS	ACTION
1	Retrieve the PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) Is the PCM DTC P115B:00 displayed?	Yes	Go to the applicable DTC inspection. (See DTC P115B:00 [MZR-CD 2.2].)
No	Go to the next step.
2	Do the following conditions appear? • The engine is not completely started. • PCM DTC P1260:00 is displayed.	Yes	Both conditions appear: • Go to Step 5.
No	Either condition or other one appears: • Go to the next step.
3	Inspect the connection of coil antenna connector. Is the coil antenna connector securely connected to the coil antenna?	Yes	Go to the next step.
No	Reconnect the coil antenna securely. Repeat Step 3.
4	Does the security light illuminate?	Yes	Go to the next step.
No	Inspect the instrument cluster and the wiring harness. (See INSTRUMENT CLUSTER INSPECTION.) Repair or replace the malfunctioning part according to the inspection results.
5	Retrieve the immobilizer system DTC using the M-MDS. (See DTC INSPECTION [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].) (See DTC INSPECTION [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)].) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].) (See DTC TABLE [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)].)
No	Go to the next step.
6	Inspect the following wiring harness and connectors: • Vehicles without advanced keyless entry and push button start system: ― Between coil antenna terminal C and instrument cluster terminal 2G ― Between coil antenna terminal D and instrument cluster terminal 2E ― Between PCM terminal 2AH and instrument cluster terminal 2W ― Between PCM terminal 2AD and instrument cluster terminal 2X • Vehicles with advanced keyless entry and push button start system: ― Between coil antenna terminal C and keyless control module terminal 2D ― Between coil antenna terminal D and keyless control module terminal 2B ― Between PCM terminal 2AH and keyless control module terminal 2I ― Between PCM terminal 2AD and keyless control module terminal 2G Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
No	Go to the next step.
7	Inspect the following: • Fuel quality (e.g.: include water contamination, winter/summer blend) • Fuel line/fuel filter clogging • Intake-air system restriction Are all items normal?	Yes	Go to the next step.
No	Service if necessary. Repeat Step 7.
8	Is the engine overheating?	Yes	Go to the symptom troubleshooting “NO.19 COOLING SYSTEM CONCERNS-OVERHEATING”. (See NO.19 COOLING SYSTEM CONCERNS-OVERHEATING [MZR-CD 2.2].)
No	Go to the next step.
9	Note • Ignore DTC P0122:00, P0123:00, P0222:00 or P0223:00 while performing this test. Switch the ignition to off. Disconnect the APP sensor connector. Switch the ignition to ON (engine off). Measure the voltage at the following terminals (wiring harness-side): • APP sensor terminal A • APP sensor terminal F Is the voltage normal? (See PCM INSPECTION [MZR-CD 2.2].)	Yes	Go to the next step.
No	Inspect the PCM terminal 2S and 2T related circuit. Repair or replace the malfunctioning part according to the inspection results.
10	Retrieve any PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) Are any DTCs displayed?	Yes	DTC is displayed: • Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD 2.2].) Communication error message is displayed: • Open circuit in wiring harness between main relay terminal E and PCM terminal 2I • Open circuit in wiring harness between main relay terminal C and PCM terminals 2C, 2F • Main relay is stuck open. • Open or poor ground circuit (PCM terminals 2A, 2B, 2D and 2E) • Poor connection of vehicle body ground
No	Go to the next step.
11	Does the engine start normally after warm-up?	Yes	Inspect the glow system operation. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].) Inspect the fuel warmer. (See FUEL WARMER INSPECTION [MZR-CD 2.2].) • If there is any malfunction: ― Repair or replace the malfunctioning part according to the inspection results. • If there is no malfunction: ― Go to the next step.
No	Go to the next step.
12	Is there any restriction in the exhaust system or oxidation catalytic converter?	Yes	Repair or replace if necessary.
No	Go to the next step.
13	Access the RPM PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) Is the RPM PID indicating the engine speed during engine cranking?	Yes	Go to the next step.
No	Go to Step 18.
14	Note • If the following test cannot be performed due to engine stalling, go to the next step. Connect the pressure gauge to the A/C line. Turn the blower and A/C switches on. Is the pressure within the specification?	Yes	Go to the next step.
No	If the A/C is always on: • Go to the symptom troubleshooting “NO.26 A/C ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY”. (See NO.26 A/C ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [MZR-CD 2.2].) For other symptoms: • Inspect the following: ― Refrigerant charging amount ― Cooling fan operation • Repair or replace the malfunctioning part according to the inspection results.
15	Inspect the APP sensor. (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Replace the accelerator pedal component. (See ACCELERATOR PEDAL COMPONENT REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
16	Depress the accelerator pedal slightly. Crank the engine. Does the engine start now?	Yes	Inspect the idle speed. (See ENGINE TUNE-UP [MZR-CD 2.2].) Repair or replace the malfunctioning part according to the inspection results.
No	Go to the next step.
17	Inspect for fuel leakage from the fuel pipe. Is there any leakage?	Yes	Repair or replace the malfunctioning part according to the inspection results.
No	Go to the next step.
18	Visually inspect the CKP sensor and teeth of pulse wheel. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [MZR-CD 2.2].) Are the CKP sensor and teeth of pulse wheel normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning part according to the inspection results.
19	Visually inspect the CMP sensor and teeth of pulse wheel. (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [MZR-CD 2.2].) Are the CMP sensor and teeth of pulse wheel normal?	Yes	Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) (See PCM INSPECTION [MZR-CD 2.2].) • ECT • IAT • MAF • RPM ― If the PID value is not normal: • Repair or replace the malfunctioning part according to the inspection results. ― If the PID value is normal: • Go to the next step.
No	Repair or replace the malfunctioning part according to the inspection results.
20	Inspect the suction control valve. (See SUCTION CONTROL VALVE INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Replace the supply pump. (See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
21	Switch the ignition to off. Disconnect the suction control valve and PCM connectors. Inspect for continuity between suction control valve terminal A (wiring harness-side) and body ground. Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground. • If the malfunction remains: ― Replace the PCM. (damaged to driver in PCM caused by short circuit to ground system) (See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
22	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Replace the common rail. (See COMMON RAIL REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
23	Inspect the engine compression. (See COMPRESSION INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Inspect the following: • Damaged valve seat • Worn valve stem and valve guide • Worn or stuck piston ring • Worn piston, piston ring or cylinder • Improper valve timing Service if necessary.
No	Go to the next step.
24	Inspect the fuel injector. (See FUEL INJECTOR INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
25	Perform the EGR Valve Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
No	Remove the supply pump and common rail. (See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD 2.2].) (See COMMON RAIL REMOVAL/INSTALLATION [MZR-CD 2.2].) Inspect the supply pump and common rail. (See SUPPLY PUMP INSPECTION [MZR-CD 2.2].) (See COMMON RAIL INSPECTION [MZR-CD 2.2].) Repair or replace the malfunctioning part according to the inspection results.
26	Verify test results. • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [MZR-CD 2.2].) • If the malfunction remains, inspect the related Service Information and perform the repair or diagnosis. ― If the vehicle is repaired, troubleshooting is completed. ― If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.

STEP

INSPECTION

RESULTS

ACTION

Retrieve the PCM DTCs using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)

Is the PCM DTC P115B:00 displayed?

Yes

Go to the applicable DTC inspection.

(See DTC P115B:00 [MZR-CD 2.2].)

Go to the next step.

Do the following conditions appear?

• The engine is not completely started.

• PCM DTC P1260:00 is displayed.

Yes

Both conditions appear:

• Go to Step 5.

Either condition or other one appears:

• Go to the next step.

Inspect the connection of coil antenna connector.

Is the coil antenna connector securely connected to the coil antenna?

Yes

Go to the next step.

Reconnect the coil antenna securely.

Repeat Step 3.

Does the security light illuminate?

Yes

Go to the next step.

Inspect the instrument cluster and the wiring harness.

(See INSTRUMENT CLUSTER INSPECTION.)

Repair or replace the malfunctioning part according to the inspection results.

Retrieve the immobilizer system DTC using the M-MDS.

(See DTC INSPECTION [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].)

(See DTC INSPECTION [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)].)

Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)].)

(See DTC TABLE [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM)].)

Go to the next step.

Inspect the following wiring harness and connectors:

• Vehicles without advanced keyless entry and push button start system:

― Between coil antenna terminal C and instrument cluster terminal 2G

― Between coil antenna terminal D and instrument cluster terminal 2E

― Between PCM terminal 2AH and instrument cluster terminal 2W

― Between PCM terminal 2AD and instrument cluster terminal 2X

• Vehicles with advanced keyless entry and push button start system:

― Between coil antenna terminal C and keyless control module terminal 2D

― Between coil antenna terminal D and keyless control module terminal 2B

― Between PCM terminal 2AH and keyless control module terminal 2I

― Between PCM terminal 2AD and keyless control module terminal 2G

Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results.

Go to the next step.

Inspect the following:

• Fuel quality (e.g.: include water contamination, winter/summer blend)

• Fuel line/fuel filter clogging

• Intake-air system restriction

Are all items normal?

Yes

Go to the next step.

Service if necessary.

Repeat Step 7.

Is the engine overheating?

Yes

Go to the symptom troubleshooting “NO.19 COOLING SYSTEM CONCERNS-OVERHEATING”.

(See NO.19 COOLING SYSTEM CONCERNS-OVERHEATING [MZR-CD 2.2].)

Go to the next step.

Note

• Ignore DTC P0122:00, P0123:00, P0222:00 or P0223:00 while performing this test.

Switch the ignition to off.

Disconnect the APP sensor connector.

Switch the ignition to ON (engine off).

Measure the voltage at the following terminals (wiring harness-side):

• APP sensor terminal A

• APP sensor terminal F

Is the voltage normal?

(See PCM INSPECTION [MZR-CD 2.2].)

Yes

Go to the next step.

Inspect the PCM terminal 2S and 2T related circuit.

Repair or replace the malfunctioning part according to the inspection results.

Retrieve any PCM DTCs using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)

Are any DTCs displayed?

Yes

DTC is displayed:

• Go to the applicable DTC inspection.

(See DTC TABLE [MZR-CD 2.2].)

Communication error message is displayed:

• Open circuit in wiring harness between main relay terminal E and PCM terminal 2I

• Open circuit in wiring harness between main relay terminal C and PCM terminals 2C, 2F

• Main relay is stuck open.

• Open or poor ground circuit (PCM terminals 2A, 2B, 2D and 2E)

• Poor connection of vehicle body ground

Go to the next step.

Does the engine start normally after warm-up?

Yes

Inspect the glow system operation.

(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].)

Inspect the fuel warmer.

(See FUEL WARMER INSPECTION [MZR-CD 2.2].)

• If there is any malfunction:

― Repair or replace the malfunctioning part according to the inspection results.

• If there is no malfunction:

― Go to the next step.

Go to the next step.

Is there any restriction in the exhaust system or oxidation catalytic converter?

Yes

Repair or replace if necessary.

Go to the next step.

Access the RPM PID using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)

Is the RPM PID indicating the engine speed during engine cranking?

Yes

Go to the next step.

Go to Step 18.

Note

• If the following test cannot be performed due to engine stalling, go to the next step.

Connect the pressure gauge to the A/C line.

Turn the blower and A/C switches on.

Is the pressure within the specification?

Yes

Go to the next step.

If the A/C is always on:

• Go to the symptom troubleshooting “NO.26 A/C ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY”.

(See NO.26 A/C ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [MZR-CD 2.2].)

For other symptoms:

• Inspect the following:

― Refrigerant charging amount

― Cooling fan operation

• Repair or replace the malfunctioning part according to the inspection results.

Inspect the APP sensor.

(See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Replace the accelerator pedal component.

(See ACCELERATOR PEDAL COMPONENT REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

Depress the accelerator pedal slightly.

Crank the engine.

Does the engine start now?

Yes

Inspect the idle speed.

(See ENGINE TUNE-UP [MZR-CD 2.2].)

Repair or replace the malfunctioning part according to the inspection results.

Go to the next step.

Inspect for fuel leakage from the fuel pipe.

Is there any leakage?

Yes

Repair or replace the malfunctioning part according to the inspection results.

Go to the next step.

Visually inspect the CKP sensor and teeth of pulse wheel.

(See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [MZR-CD 2.2].)

Are the CKP sensor and teeth of pulse wheel normal?

Yes

Go to the next step.

Repair or replace the malfunctioning part according to the inspection results.

Visually inspect the CMP sensor and teeth of pulse wheel.

(See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [MZR-CD 2.2].)

Are the CMP sensor and teeth of pulse wheel normal?

Yes

Access the following PIDs using the M-MDS:

(See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)

(See PCM INSPECTION [MZR-CD 2.2].)

• ECT

• IAT

• MAF

• RPM

― If the PID value is not normal:

• Repair or replace the malfunctioning part according to the inspection results.

― If the PID value is normal:

• Go to the next step.

Repair or replace the malfunctioning part according to the inspection results.

Inspect the suction control valve.

(See SUCTION CONTROL VALVE INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Replace the supply pump.

(See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

Switch the ignition to off.

Disconnect the suction control valve and PCM connectors.

Inspect for continuity between suction control valve terminal A (wiring harness-side) and body ground.

Is there continuity?

Yes

Repair or replace the wiring harness for a possible short to ground.

• If the malfunction remains:

― Replace the PCM. (damaged to driver in PCM caused by short circuit to ground system)

(See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

Inspect the fuel pressure sensor.

(See FUEL PRESSURE SENSOR INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Replace the common rail.

(See COMMON RAIL REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

Inspect the engine compression.

(See COMPRESSION INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Inspect the following:

• Damaged valve seat

• Worn valve stem and valve guide

• Worn or stuck piston ring

• Worn piston, piston ring or cylinder

• Improper valve timing

Service if necessary.

Go to the next step.

Inspect the fuel injector.

(See FUEL INJECTOR INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Replace the fuel injector.

(See FUEL INJECTOR REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

Perform the EGR Valve Operation Inspection.

(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results.

Remove the supply pump and common rail.

(See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD 2.2].)

(See COMMON RAIL REMOVAL/INSTALLATION [MZR-CD 2.2].)

Inspect the supply pump and common rail.

(See SUPPLY PUMP INSPECTION [MZR-CD 2.2].)

(See COMMON RAIL INSPECTION [MZR-CD 2.2].)

Repair or replace the malfunctioning part according to the inspection results.

Verify test results.

• If normal, return to the diagnostic index to service any additional symptoms.

(See SYMPTOM DIAGNOSTIC INDEX [MZR-CD 2.2].)

• If the malfunction remains, inspect the related Service Information and perform the repair or diagnosis.

― If the vehicle is repaired, troubleshooting is completed.

― If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.