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

id0103d3333800

MTX

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 APP sensor. (See ACCELERATOR PEDAL POSITION (APP) SENSOR 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].)

ATX

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 (engine stalls and i-stop warning light (amber) illuminates)

•  Bonnet latch switch malfunction

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

―  False detection of open driver's door (when driver's seat belt is unfastened, engine stalls and i-stop warning light (amber) illuminates)

•  Driver’s door latch switch malfunction

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

―  False detection of unfastened driver seat belt (when driver's door is opened, engine stalls and i-stop warning light (amber) illuminates)

•  Driver-side buckle switch malfunction

•  Short to ground in wiring harness between driver-side buckle switch and SAS control module terminal 2M

―  False detection of stopped vehicle even though vehicle moves on inclined road surface

•  Vehicle speed signal malfunction (ABS wheel-speed sensor malfunction)

Cannot recognize signal for conditions permitting engine restart

•  False detection of i-stop operation not switched OFF even though switched OFF

―  i-stop OFF switch malfunction

―  Open circuit in wiring harness between i-stop OFF switch terminal I and PCM terminal 1AV

•  False detection of brake pedal non-operation even though operated (released or depressed more)

―  Brake fluid pressure sensor (built-in DSC HU/CM) malfunction

•  False detection of accelerator pedal not depressed even though accelerator pedal is depressed

―  APP sensor malfunction

•  False detection of selector lever is P or N position even though selector lever is in D range

―  TR switch malfunction

―  TR switch misadjustment

―  Open or short circuit in wiring harness between TR switch and TCM terminal U

•  False detection of selector lever in D range even though shifted to M range

―  M range switch malfunction

―  Open circuit in wiring harness between selector lever component and TCM terminal K

•  Falsely detects that climate control unit detects driver-side air mix door position at MAX HOT or MAX COLD

―  Driver-side air mix actuator malfunction

―  Driver-side air mix actuator position sensor malfunction

―  Driver-side air mix door link stuck

•  False detection of changed climate control unit even though air conditioner settings (defroster mode, temperature setting on driver's side) are changed manually

―  Climate control unit (panel switch) malfunction

•  False detection of climate control unit remaining OFF even though rear defroster is ON

―  Climate control unit (panel switch) malfunction

•  False detection of assured power brake unit vacuum (assist force) even though vacuum decreases

―  Power brake unit vacuum sensor malfunction

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

•  Power brake unit vacuum sensor terminal A—PCM terminal 1P

•  Power brake unit vacuum sensor terminal B—PCM terminal 1Q

•  Power brake unit vacuum sensor terminal C—PCM terminal 1N

•  Cannot recognize steering wheel angle and speed even though steering wheel is turned.

―  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

•  False detection of advanced key being inside vehicle even though advanced key is outside of vehicle

―  Keyless antenna malfunction

―  Short or open circuit in wiring harness between keyless antenna and keyless control module

Engine system malfunction (engine does not start even though cranking for 3 s or more when engine is restarted) (i-stop warning light (amber) illuminates)

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

―  CKP sensor malfunction

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

―  Generator control malfunction

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

―  EGR control malfunction

―  Purge control malfunction

―  Engine starting system malfunction

―  Generator drive belt wear

•  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 (engine stalls and i-stop warning light (amber) illuminates) • Bonnet latch switch malfunction • Open circuit in wiring harness between bonnet latch switch terminal A and BCM terminal 1J ― False detection of open driver's door (when driver's seat belt is unfastened, engine stalls and i-stop warning light (amber) illuminates) • Driver’s door latch switch malfunction • Open circuit in wiring harness between driver’s door latch switch and BCM ― False detection of unfastened driver seat belt (when driver's door is opened, engine stalls and i-stop warning light (amber) illuminates) • Driver-side buckle switch malfunction • Short to ground in wiring harness between driver-side buckle switch and SAS control module terminal 2M ― False detection of stopped vehicle even though vehicle moves on inclined road surface • Vehicle speed signal malfunction (ABS wheel-speed sensor malfunction) Cannot recognize signal for conditions permitting engine restart • False detection of i-stop operation not switched OFF even though switched OFF ― i-stop OFF switch malfunction ― Open circuit in wiring harness between i-stop OFF switch terminal I and PCM terminal 1AV • False detection of brake pedal non-operation even though operated (released or depressed more) ― Brake fluid pressure sensor (built-in DSC HU/CM) malfunction • False detection of accelerator pedal not depressed even though accelerator pedal is depressed ― APP sensor malfunction • False detection of selector lever is P or N position even though selector lever is in D range ― TR switch malfunction ― TR switch misadjustment ― Open or short circuit in wiring harness between TR switch and TCM terminal U • False detection of selector lever in D range even though shifted to M range ― M range switch malfunction ― Open circuit in wiring harness between selector lever component and TCM terminal K • Falsely detects that climate control unit detects driver-side air mix door position at MAX HOT or MAX COLD ― Driver-side air mix actuator malfunction ― Driver-side air mix actuator position sensor malfunction ― Driver-side air mix door link stuck • False detection of changed climate control unit even though air conditioner settings (defroster mode, temperature setting on driver's side) are changed manually ― Climate control unit (panel switch) malfunction • False detection of climate control unit remaining OFF even though rear defroster is ON ― Climate control unit (panel switch) malfunction • False detection of assured power brake unit vacuum (assist force) even though vacuum decreases ― Power brake unit vacuum sensor malfunction ― Short or open circuit in wiring harness between the following terminals: • Power brake unit vacuum sensor terminal A—PCM terminal 1P • Power brake unit vacuum sensor terminal B—PCM terminal 1Q • Power brake unit vacuum sensor terminal C—PCM terminal 1N • Cannot recognize steering wheel angle and speed even though steering wheel is turned. ― 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 • False detection of advanced key being inside vehicle even though advanced key is outside of vehicle ― Keyless antenna malfunction ― Short or open circuit in wiring harness between keyless antenna and keyless control module Engine system malfunction (engine does not start even though cranking for 3 s or more when engine is restarted) (i-stop warning light (amber) illuminates) • Piston-stop position malfunction while i-stop function is operating ― CKP sensor malfunction ― Throttle value operation malfunction (drive-by-wire control malfunction) ― Generator control malfunction ― Intake-air system related malfunction (air suction, vacuum hose breakage) ― EGR control malfunction ― Purge control malfunction ― Engine starting system malfunction ― Generator drive belt wear • Mechanical (engine) malfunction ― Valve timing malfunction ― Variable valve timing system operation malfunction

Diagnostic procedure

STEP	INSPECTION	RESULTS	ACTION
1	Retrieve the PCM, TCM and BCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].) (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FS5A-EL].) (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 ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FS5A-EL].) (See DTC TABLE [BCM].)
1		No	Go to the next step.
2	Does the i-stop warning light (amber) illuminate?	Yes	Perform the symptom troubleshooting “NO.28 i-stop WARNING LIGHT (AMBER) ILLUMINATES”. (See NO.28 i-stop WARNING LIGHT (AMBER) ILLUMINATES [MZR 2.0 DISI i-stop].)
2	Does the i-stop warning light (amber) illuminate?	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 BCM PID DRSW_D using the M-MDS. (See PID/DATA MONITOR INSPECTION [BCM].) Are the DRSW_D PID values congruent with the opening and closing of the driver’s door? (See PID/DATA MONITOR TABLE [BCM].)	Yes	Go to Step 7.
5		No	Go to the next step.
6	Inspect the front door latch switch (driver’s side). (See FRONT DOOR LATCH SWITCH INSPECTION.) Is there any malfunction?	Yes	Replace the front door latch and lock actuator (driver’s side). (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
6		No	Repair or replace the wiring harness between front door latch switch (driver’s side) and BCM for a possible open or short circuit.
7*	Switch the ignition to ON. Access the TCM PID TR using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION [FS5A-EL].) Is the TR PID value changing normally according to selector lever position?	Yes	Go to Step 9.
7*		No	Adjust the TR switch and verify the PID values again. (See TRANSAXLE RANGE (TR) SWITCH ADJUSTMENT [FS5A-EL].) • If the PID values are normal: ― Go to the next step. • If the PID values are not normal: ― TR switch misadjustment. • The symptom troubleshooting is completed.
8	Inspect the TR switch. (See TRANSAXLE RANGE (TR) SWITCH INSPECTION [FS5A-EL].) Is there any malfunction?	Yes	Replace the TR switch. (See TRANSAXLE RANGE (TR) SWITCH REMOVAL/INSTALLATION [FS5A-EL].)
8		No	Repair or replace the wiring harness between TR switch and TCM terminal U for a possible open or short circuit.
9	Switch the ignition to ON. Access the TCM PID MNL_SW using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION [FS5A-EL].) Is the PID value normal?	Yes	Go to Step 11.
9		No	Go to the next step.
10	Inspect the M range switch. (See M RANGE SWITCH INSPECTION [FS5A-EL].) Is there any malfunction?	Yes	Replace the M range switch. (See M RANGE SWITCH REMOVAL/INSTALLATION [FS5A-EL].)
10		No	Repair or replace the wiring harness between selector lever component and TCM terminal K for a possible open or short circuit.
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 Are the PID values normal? (See PCM INSPECTION [MZR 2.0 DISI i-stop].)	Yes	Go to the next step.
11*		No	Replace the APP sensor. (See ACCELERATOR PEDAL POSITION (APP) SENSOR REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
12	Measure the voltage at the PCM terminal 1AV with the i-stop OFF switch and related wiring harness are shaken. (See PCM INSPECTION [MZR 2.0 DISI i-stop].) Is the voltage normal when the i-stop OFF switch and related wiring harness are shaken?	Yes	Go to Step 14.
12		No	Go to the next step.
13	Inspect the i-stop OFF switch. (See i-stop OFF SWITCH INSPECTION [MZR 2.0 DISI i-stop].) Is there any malfunction?	Yes	Replace the i-stop OFF switch. (See i-stop OFF SWITCH REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
13		No	Repair or replace the wiring harness between i-stop OFF switch terminal I and PCM terminal 1AV for a possible short to ground.
14	Inspect the sensor output value from the ABS wheel-speed sensor. (See FRONT ABS WHEEL-SPEED SENSOR INSPECTION.) (See REAR ABS WHEEL-SPEED SENSOR INSPECTION.) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
14		No	Go to the next step.
15	Switch the ignition to ON. Access the BCM PID R_DEF_SW using the M-MDS. (See PID/DATA MONITOR INSPECTION [BCM].) Does the R_DEF_SW PID value change according to the defroster switch operation? (See PID/DATA MONITOR TABLE [BCM].)	Yes	Go to the next step.
15		No	Replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
16	Idle the engine. Operate the panel switch to switch to the defroster mode. Does the display on the information display match the panel switch operation?	Yes	Go to Step 18.
16		No	Go to the next step.
17	Inspect the information display. (See INFORMATION DISPLAY INPUT/OUTPUT CHECK MODE.) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
17		No	Replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
18	Measure the voltage at the climate control unit terminal 1G when the driver-side temperature setting is MAX HOT and MAX COLD. Is the voltage normal? (See CLIMATE CONTROL UNIT INSPECTION [FULL-AUTO AIR CONDITIONER].)	Yes	Go to Step 20.
18		No	Go to the next step.
19	Inspect the driver-side air mix actuator. (See AIR MIX ACTUATOR INSPECTION [FULL-AUTO AIR CONDITIONER].) Is there any malfunction?	Yes	Replace the driver-side air mix actuator. (See AIR MIX ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
19		No	Inspect the air mix actuator and linkage for sticking. (See A/C UNIT DISASSEMBLY/ASSEMBLY.) • If there is a sticking: ― Repair or replace the malfunctioning part according to the inspection results. • If there is no sticking: ― Replace the air mix actuator. (See AIR MIX ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
20	Switch the ignition to ON. Access the SAS control module PID BUCKLE_D using the M-MDS. (See PID/DATA MONITOR INSPECTION [TYPE B].) Is the BUCKLE_D PID value congruent with the seat belt condition? (See PID/DATA MONITOR TABLE [TYPE B].)	Yes	Go to Step 22.
20		No	Go to the next step.
21	Inspect the driver-side buckle switch. (See BUCKLE SWITCH INSPECTION.) Is there any malfunction?	Yes	Replace the driver-side buckle switch. (See FRONT BUCKLE REMOVAL/INSTALLATION.)
21		No	Repair or replace the wiring harness between driver-side buckle switch and SAS control module terminal 2M for a possible short to ground.
22	Position the advanced key in the same position as when the malfunction occurred. Can the engine be started?	Yes	Go to Step 24.
22		No	Go to the next step.
23	Inspect the wiring harness between keyless antenna and keyless control module for a short or open circuit when the malfunction occurred and the advanced key was not in the operable range. Is there any malfunction?	Yes	Repair or replace the wiring harness for a possible a short or open circuit.
23		No	Replace the applicable keyless antenna. (See KEYLESS ANTENNA REMOVAL/INSTALLATION.)
24	Start the engine and it at idle. Access the BCM PID STEER ANGL and EHPAS PID STEER_RATE using the M-MDS. (See PID/DATA MONITOR INSPECTION [BCM].) (See ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS) ON-BOARD DIAGNOSIS.) Is the PID value normal? (See PID/DATA MONITOR TABLE [BCM].)	Yes	Go to Step 26.
24		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.
25	Inspect the steering angle sensor. (See STEERING ANGLE SENSOR INSPECTION.) Is there any malfunction?	Yes	Replace the steering angle sensor. (See STEERING ANGLE SENSOR REMOVAL/INSTALLATION.)
25		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.
26	Turn off the i-stop system with i-stop OFF switch. Start the engine and run it is idling. Stop the engine. Switch the ignition to ON (engine off). Monitor the PCM PID BBP using the M-MDS while the brake pedal has been depressed several times. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].) Does the monitor value decrease every time the brake pedal is depressed?	Yes	Go to Step 29.
26		No	Go to the next step.
27	Perform the vacuum function inspection for the power brake unit and the vacuum loss inspection. (See POWER BRAKE UNIT INSPECTION.) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
27		No	Go to the next step.
28	Inspect the power brake unit vacuum sensor. (See POWER BRAKE UNIT INSPECTION.) Is there any malfunction?	Yes	Replace the power brake unit vacuum sensor. (See POWER BRAKE UNIT REMOVAL/INSTALLATION (R.H.D.) [MZR 2.0 DISI i-stop].)
28		No	Inspect the wiring harness between the following terminals for a short or open circuit: • Power brake unit vacuum sensor terminal A—PCM terminal 1P • Power brake unit vacuum sensor terminal B—PCM terminal 1Q • Power brake unit vacuum sensor terminal C—PCM terminal 1N Repair or replace the suspected wiring harness.
29	Inspect the brake fluid pressure sensor. (See BRAKE FLUID PRESSURE SENSOR INSPECTION.) Is there any malfunction?	Yes	Replace the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION.)
29		No	Go to the next step.
30	Switch the ignition to ON using the push button start switch. Does the engine start smoothly?	Yes	Go to the next step.
30		No	Go to the applicable symptom troubleshooting. (See QUICK DIAGNOSTIC CHART [MZR 2.0 DISI i-stop].)
31	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.
31		No	Go to the next step.
32	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.
32		No	Go to the next step.
33	Inspect the generator drive belt. (See DRIVE BELT INSPECTION [MZR 2.0 DISI i-stop].) Does the drive belt auto tensioner indicator mark exceed the limit?	Yes	Replace the generator drive belt. (See DRIVE BELT REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
33		No	Go to the next step.
34	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.
34		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.
35	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].)
35		No	Go to the next step.
36	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].)
36		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].)
37	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].)