NO.33 ENGINE DOES NOT RESTART [MZR 2.0 DISI i-stop]

id0103d3333800

33

ENGINE DOES NOT RESTART

DESCRIPTION

•  Engine does not restart when attempting to resume driving vehicle after stopping, and indicator lights/warning lights in instrument cluster are all illuminated.

•  Engine does not restart even though restart conditions are met.

POSSIBLE CAUSE

False detection of engine restart restriction conditions during engine stop

•  False detection of vehicle in unsafe condition while i-stop function is operating

―  False detection of open bonnet

•  Bonnet latch switch malfunction

•  Open circuit in wiring harness between bonnet latch switch terminal A and BCM terminal 1J

―  False detection of open, liftgate/trunk

•  Door latch switch malfunction

•  Liftgate/trunk lid latch switch malfunction

•  Open circuit in wiring harness between door latch switch and BCM

•  Short to ground in wiring harness between liftgate/trunk lid latch switch and BCM

Cannot recognize signal for conditions permitting engine restart

•  False recognition of clutch pedal not depressed

―  Clutch stroke sensor malfunction

―  Short or open circuit in wiring harness between the following terminals:

•  Clutch stroke sensor terminal C—PCM terminal 1N

•  Clutch stroke sensor terminal D—PCM terminal 1P

•  Clutch stroke sensor terminal B—PCM terminal 1AS

•  False recognition of depressed accelerator pedal

―  APP sensor malfunction

•  False detection of steering wheel rotation speed

―  Steering angle sensor initialization malfunction

―  Steering angle sensor malfunction

―  Short or open circuit in wiring harness between steering angle sensor and BCM terminals 2D, 2E, 2F, 2G, 2H, or 2I

Engine system malfunction

•  Piston-stop position malfunction while i-stop function is operating

―  Intake-air system related malfunction (air suction, vacuum hose breakage)

―  EGR control malfunction

―  Purge control malfunction

―  Throttle value operation malfunction (drive-by-wire control malfunction)

―  Generator control malfunction

―  Engine starting system malfunction

―  CKP sensor malfunction

•  Mechanical (engine) malfunction

―  Valve timing malfunction

―  Variable valve timing system operation malfunction

33	ENGINE DOES NOT RESTART
DESCRIPTION	• Engine does not restart when attempting to resume driving vehicle after stopping, and indicator lights/warning lights in instrument cluster are all illuminated. • Engine does not restart even though restart conditions are met.
POSSIBLE CAUSE	False detection of engine restart restriction conditions during engine stop • False detection of vehicle in unsafe condition while i-stop function is operating ― False detection of open bonnet • Bonnet latch switch malfunction • Open circuit in wiring harness between bonnet latch switch terminal A and BCM terminal 1J ― False detection of open, liftgate/trunk • Door latch switch malfunction • Liftgate/trunk lid latch switch malfunction • Open circuit in wiring harness between door latch switch and BCM • Short to ground in wiring harness between liftgate/trunk lid latch switch and BCM Cannot recognize signal for conditions permitting engine restart • False recognition of clutch pedal not depressed ― Clutch stroke sensor malfunction ― Short or open circuit in wiring harness between the following terminals: • Clutch stroke sensor terminal C—PCM terminal 1N • Clutch stroke sensor terminal D—PCM terminal 1P • Clutch stroke sensor terminal B—PCM terminal 1AS • False recognition of depressed accelerator pedal ― APP sensor malfunction • False detection of steering wheel rotation speed ― Steering angle sensor initialization malfunction ― Steering angle sensor malfunction ― Short or open circuit in wiring harness between steering angle sensor and BCM terminals 2D, 2E, 2F, 2G, 2H, or 2I Engine system malfunction • Piston-stop position malfunction while i-stop function is operating ― Intake-air system related malfunction (air suction, vacuum hose breakage) ― EGR control malfunction ― Purge control malfunction ― Throttle value operation malfunction (drive-by-wire control malfunction) ― Generator control malfunction ― Engine starting system malfunction ― CKP sensor malfunction • Mechanical (engine) malfunction ― Valve timing malfunction ― Variable valve timing system operation malfunction

Diagnostic procedure

STEP	INSPECTION	RESULTS	ACTION
1	Retrieve the PCM and BCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].) (See DTC INSPECTION [BCM].) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR 2.0 DISI i-stop].) (See DTC TABLE [BCM].)
1		No	Go to the next step.
2	Perform the initialization of the steering angle sensor. (See STEERING ANGLE SENSOR INITIALIZATION PROCEDURE.) Has the malfunction symptom been eliminated?	Yes	Malfunction caused by the steering angle sensor initialization malfunction. • Symptom troubleshooting is completed.
2		No	Go to the next step.
3	Switch the ignition to ON. Access the BCM PID HOOD_SW using the M-MDS. (See PID/DATA MONITOR INSPECTION [BCM].) Is the HOOD_SW PID value normal? (See PID/DATA MONITOR TABLE [BCM].)	Yes	Go to Step 5.
3		No	Go to the next step.
4	Inspect the bonnet latch switch. (See BONNET LATCH SWITCH INSPECTION.) Is there any malfunction?	Yes	Replace the bonnet latch switch. (See BONNET LATCH AND RELEASE LEVER REMOVAL/INSTALLATION.)
4		No	Repair or replace the wiring harness between bonnet latch switch terminal A and BCM terminal 1J for a possible open circuit.
5*	Switch the ignition to ON. Access the following BCM PIDs using the M-MDS: (See PID/DATA MONITOR INSPECTION [BCM].) • TR/LG_SW • DRSW_D • DRSW_P • DRSW_LR • DRSW_RR Are the PID values congruent with the opening and closing of the doors and liftgate/trunk? (See PID/DATA MONITOR TABLE [BCM].)	Yes	Go to Step 7.
5*		No	Go to the next step.
6	Inspect the PID-related switch in which the malfunction occurred in Step 5. (See TRUNK LID LATCH SWITCH INSPECTION.) (See LIFTGATE LATCH SWITCH INSPECTION.) (See FRONT DOOR LATCH SWITCH INSPECTION.) (See REAR DOOR LATCH SWITCH INSPECTION.) Is there any malfunction?	Yes	Replace the applicable switch. (See TRUNK LID LATCH AND RELEASE ACTUATOR REMOVAL/INSTALLATION.) (See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.) (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.) (See REAR DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
6		No	Inspect the following in which the malfunction occurred in Step 5: • Open circuit in wiring harness between door latch switch and BCM • Short to ground in wiring harness between liftgate/trunk lid latch switch and BCM Repair or replace the suspected wiring harness.
7*	Switch the ignition to ON. Access the EHPAS PID STEER_RATE using the M-MDS. (See ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS) ON-BOARD DIAGNOSIS.) Is the PID value normal?	Yes	Go to Step 9.
7*		No	Perform the initialization of the steering angle sensor and verify the PID values again. (See STEERING ANGLE SENSOR INITIALIZATION PROCEDURE.) • If the PID values are normal: ― Steering angle sensor initialization malfunction. ― The symptom troubleshooting is completed. • If the PID values are not normal: ― Go to the next step.
8	Inspect the steering angle sensor. (See STEERING ANGLE SENSOR INITIALIZATION PROCEDURE.) Is there any malfunction?	Yes	Replace the steering angle sensor. (See STEERING ANGLE SENSOR INITIALIZATION PROCEDURE.)
8		No	Inspect the wiring harness between the following terminals for a short or open circuit: • Steering angle sensor terminal A—BCM terminal 2E • Steering angle sensor terminal B—BCM terminal 2H • Steering angle sensor terminal C—BCM terminal 2I • Steering angle sensor terminal D—BCM terminal 2F • Steering angle sensor terminal E—BCM terminal 2D • Steering angle sensor terminal F—BCM terminal 2G Repair or replace the suspected wiring harness.
9	Switch the ignition to ON. Access the PCM PID CPP using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].) Does the CPP PID value change according to the amount the clutch pedal is depressed? (See PCM INSPECTION [MZR 2.0 DISI i-stop].)	Yes	Go to Step 11.
9		No	Go to the next step.
10	Inspect the clutch stroke sensor. (See CLUTCH STROKE SENSOR INSPECTION [MZR 2.0 DISI i-stop].) Is there any malfunction?	Yes	Replace the clutch stroke sensor. (See CLUTCH STROKE SENSOR REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
10		No	Inspect the wiring harness between the following terminals for a short or open circuit: • Clutch stroke sensor terminal C—PCM terminal 1N • Clutch stroke sensor terminal D—PCM terminal 1P • Clutch stroke sensor terminal B—PCM terminal 1AS Repair or replace the suspected wiring harness.
11*	Switch the ignition to ON. Access the following PCM PIDs using the M-MDS when the accelerator pedal is initially depressed: (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].) • APP1 • APP2 Does the PID values rise according to the accelerator pedal depression? (See PCM INSPECTION [MZR 2.0 DISI i-stop].)	Yes	Go to the next step.
11*		No	Replace the accelerator pedal. (See ACCELERATOR PEDAL REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
12	Switch the ignition to ON using the push button start switch. Does the engine start smoothly?	Yes	Go to the next step.
12		No	Go to the applicable symptom troubleshooting. (See QUICK DIAGNOSTIC CHART [MZR 2.0 DISI i-stop].)
13	Start the engine and warm it up completely. Verify the idling condition. Is the engine idling rough?	Yes	Inspect the following: • EGR system • Purge system • Variable valve timing system • Air suction into intake-air system • Vacuum hose leakage Repair or replace the malfunctioning part according to the inspection results.
13		No	Go to the next step.
14	Perform the Drive-by-wire Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR 2.0 DISI i-stop].) Is the drive-by-wire control system normal	Yes	Repair or replace the malfunctioning part according to the inspection results.
14		No	Go to the next step.
15	Start the engine and idle it. Monitor the PCM PID ALTT V value of the data monitor function when the PCM PID ALTF is turned ON/OFF using the simulation function. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].) Does the ALTT V PID value increase and/or decrease in accordance with the ALTF ON/OFF operation?	Yes	Go to the next step.
15		No	Inspect the following: • Wiring harness between generator terminal P and PCM terminal 2AJ • Wiring harness between generator terminal D and PCM terminal 2AI • Generator (See GENERATOR INSPECTION [MZR 2.0 DISI i-stop].) Repair or replace the malfunctioning part according to the inspection results.
16	Start the engine and idle it. Verify the PCM terminal 2W output signal wave pattern using an oscilloscope. (See PCM INSPECTION [MZR 2.0 DISI i-stop].) Is the output wave pattern normal?	Yes	Replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
16		No	Go to the next step.
17	Visually inspect the CKP sensor pulse wheel. Are there any cracks or bending in the pulse wheel?	Yes	Replace the crankshaft pulley. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
17		No	Inspect the wiring harness between the following terminals: • CKP sensor terminal A—PCM terminal 2T • CKP sensor terminal B—PCM terminal 2W • CKP sensor terminal C—PCM terminal 2O If there is a malfunction: • Repair or replace the suspected wiring harness. If normal: • Replace the CKP sensor. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
18	Verify the test results. • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [MZR 2.0 DISI i-stop].) • If a 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, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)