NO.28 i-stop WARNING LIGHT (AMBER) ILLUMINATES [MZR 2.0 DISI i-stop]

id0103d3333300

28

i-stop WARNING LIGHT (AMBER) ILLUMINATES

DESCRIPTION

•  i-stop warning light (amber) remains illuminated while engine is running.

•  i-stop warning light (amber) illuminates and engine does not restart while i-stop function is operating.

POSSIBLE CAUSE

PCM does not recognize system is turned off using i-stop OFF switch

•  i-stop OFF switch malfunction

―  i-stop OFF switch malfunction

―  Short to ground in wiring harness between i-stop OFF switch terminal I and PCM terminal 1AV

Instrument cluster malfunction

•  i-stop warming light illumination circuit in instrument cluster disabled

False detection of engine restart inhibition conditions while i-stop function is operating

•  False detection of unfastened driver seat belt

―  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 open door, liftgate, and 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

•  False detection of open bonnet

―  Bonnet latch switch malfunction (stuck open)

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

Engine-restart fails

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

―  CKP sensor signal malfunction

―  Drive-by-wire control malfunction

―  Generator control malfunction

―  Air suction into intake air system

•  Mechanical malfunction

―  Valve timing malfunction

―  Variable valve timing control malfunction

28	i-stop WARNING LIGHT (AMBER) ILLUMINATES
DESCRIPTION	• i-stop warning light (amber) remains illuminated while engine is running. • i-stop warning light (amber) illuminates and engine does not restart while i-stop function is operating.
POSSIBLE CAUSE	PCM does not recognize system is turned off using i-stop OFF switch • i-stop OFF switch malfunction ― i-stop OFF switch malfunction ― Short to ground in wiring harness between i-stop OFF switch terminal I and PCM terminal 1AV Instrument cluster malfunction • i-stop warming light illumination circuit in instrument cluster disabled False detection of engine restart inhibition conditions while i-stop function is operating • False detection of unfastened driver seat belt ― 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 open door, liftgate, and 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 • False detection of open bonnet ― Bonnet latch switch malfunction (stuck open) ― Open circuit in wiring harness between bonnet latch switch terminal A and BCM terminal 1J Engine-restart fails • Piston-stop malfunction while i-stop function is operating ― CKP sensor signal malfunction ― Drive-by-wire control malfunction ― Generator control malfunction ― Air suction into intake air system • Mechanical malfunction ― Valve timing malfunction ― Variable valve timing control malfunction

Diagnostic procedure

STEP	INSPECTION	RESULTS	ACTION
1	Retrieve the PCM, BCM, SAS control module, and instrument cluster DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].) (See DTC INSPECTION [BCM].) (See DTC INSPECTION [TYPE A].) (See DTC INSPECTION [TYPE B].) (See DTC INSPECTION [INSTRUMENT CLUSTER].) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR 2.0 DISI i-stop].) (See DTC TABLE [BCM].) (See DTC TABLE [TYPE A].) (See DTC TABLE [TYPE B].) (See DTC TABLE [INSTRUMENT CLUSTER].)
1		No	Go to the next step.
2	Verify that the i-stop warning light illuminates while driving. Does the i-stop warning light illuminate?	Yes	Go to the next step.
2		No	Go to Step 6.
3*	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 5.
3*		No	Go to the next step.
4	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].)
4		No	Repair or replace the wiring harness between i-stop OFF switch terminal I and PCM terminal 1AV for a possible short to ground.
5	Switch the ignition to ON. Access the instrument cluster PID WL+IL and illuminate and turn off the warning light in the instrument cluster using the M-MDS. (See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].) Does the i-stop warning light illuminate or turn off according to the M-MDS operation? (See ACTIVE COMMAND MODES TABLE [INSTRUMENT CLUSTER].)	Yes	Replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
5		No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
6	Does the malfunction occur when the door is opened?	Yes	Go to the next step.
6	Does the malfunction occur when the door is opened?	No	Go to Step 8.
7	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.)
7		No	Repair or replace the wiring harness between driver-side buckle switch and SAS control module terminal 2M for a possible short to ground.
8	Does the malfunction occur when the driver seat belt is unfastened?	Yes	Go to the next step.
8		No	Go to Step 11.
9*	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	Replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
9*		No	Go to the next step.
10	Inspect the PID-related switch in which the malfunction occurred in Step 9. (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.)
10		No	Inspect the following in which the malfunction occurred in Step 9: • 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.
11*	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 13.
11*		No	Go to the next step.
12	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.)
12		No	Repair or replace the wiring harness between bonnet latch switch terminal A and BCM terminal 1J for a possible open circuit.
13	Press the push button start switch to start the engine. Can the engine be started normally?	Yes	Go to the next step.
13		No	Perform the symptom troubleshooting "NO.3 WILL NOT CRANK" or "NO.4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK". (See NO.3 WILL NOT CRANK [MZR 2.0 DISI i-stop].) (See NO.4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK [MZR 2.0 DISI i-stop].)
14	Start the engine and warm it up completely. Is the idle speed regulated?	Yes	Go to the next step.
14		No	Inspect the following: • EGR system (See EGR VALVE INSPECTION [MZR 2.0 DISI i-stop].) • Evaporative purge control (See PURGE SOLENOID VALVE INSPECTION [MZR 2.0 DISI i-stop].) • Variable valve timing system (See VARIABLE VALVE TIMING ACTUATOR INSPECTION [MZR 2.0 DISI i-stop].) • Intake-air system air suction Repair or replace the malfunctioning parts according to the inspection results.
15	Perform the Drive-by-wire Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR 2.0 DISI i-stop].) Is the throttle valve operation normal?	Yes	Go to the next step.
15		No	Repair or replace the malfunctioning parts according to the inspection results.
16	Start the engine and warm it up completely. Access the PCM PID ALTT V using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].) Does the ALTT V PID value increase when the rear window defroster, headlights, and blower motor are operated simultaneously?	Yes	Go to the next step.
16		No	Inspect the generator. (See GENERATOR INSPECTION [MZR 2.0 DISI i-stop].) Repair or replace the malfunctioning parts according to the inspection results.
17	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].)
17		No	Inspect the CKP sensor pulse wheel. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [MZR 2.0 DISI i-stop]s.) • If there is a malfunction: ― Replace the crankshaft pulley. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) • 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].)