NO.31 i-stop FUNCTION DOES NOT OPERATE [MZR 2.0 DISI i-stop]

id0103d3333600

31

i-stop FUNCTION DOES NOT OPERATE
DESCRIPTION
•  i-stop function does not operate when vehicle is stopped.
POSSIBLE CAUSE
False detection of conditions other than i-stop function operation
•  Falsely detects that driver does not intend to stop
―  False detection of depressed accelerator pedal
•  APP sensor malfunction
•  Falsely detection of internal/external vehicle temperature out of operation range (−10 to 50 °C {14 to 122 °F})
―  Ambient temperature sensor malfunction (sensor specific malfunction)
―  Short or open circuit in wiring harness between ambient temperature sensor terminal A and BCM terminal 1X
―  Open circuit in wiring harness between ambient temperature sensor terminal B and BCM terminal 1H
•  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
•  False detection of stopped vehicle
―  Vehicle speed signal malfunction
•  ABS wheel-speed sensor malfunction
•  False detection of depressed clutch pedal
―  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 detection of shift lever in position other than neutral
―  Neutral switch No.1 malfunction
―  Neutral switch No.2 malfunction
―  Short to power supply or open circuit in wiring harness between the following terminals:
•  Neutral switch No.1 terminal A—PCM terminal 2AA
•  Neutral switch No.2 terminal A—PCM terminal 1AJ
•  False detection of vehicle in unsafe condition
―  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
―  False detection of open door and 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
―  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 2U
•  False detection of parked vehicle
―  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 terminal 2D, 2E, 2F, 2G, 2H, or 2I
•  False detection of low power brake unit load
―  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
―  Power brake unit malfunction (air tightness malfunction)
―  Malfunction in vacuum hose to power brake unit (damage, bad check valve)
•  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 or linkage stuck
•  False detection of rear window defroster operation
―  Climate control unit (panel switch) malfunction
POSSIBLE CAUSE
Falsely detects possible inability of engine to restart
•  False detection of low (less than 0 °C {32 °F}) or high (70 °C {158 °F} or more) battery fluid temperature
―  Battery fluid temperature sensor (integrated with current sensor No.1) malfunction (sensor specific malfunction)
•  False detection of low engine coolant temperature (55 °C {131 °F} or less)
―  ECT sensor malfunction (sensor specific malfunction)
•  False detection of high intake air temperature (100 °C {212 °F} or more)
―  IAT sensor malfunction (sensor specific malfunction)
•  Falsely detects that keyless control module detects that transmitter (advanced key) is outside of cabin
―  Keyless antenna malfunction
―  Short or open circuit in wiring harness between keyless antenna and keyless control module
Determines possible inability of engine to restart
•  Battery voltage decrease
―  Main battery malfunction
―  Sub battery malfunction
―  Generator malfunction
―  Sub battery charging system malfunction
•  Charge relay malfunction
•  Any of the following parts exceeds assured operation amount:
―  Starter relay
―  Starter
―  Power relay
―  Power drive relay
•  Number of times engine restart exceed limit.
•  Number of cranking using the sub battery exceed limit.

Diagnostic procedure

STEP

INSPECTION

RESULTS

ACTION
1
Retrieve the PCM, BCM, SAS control module, instrument cluster and climate control unit (full-auto air conditioner) DTCs using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
(See DTC INSPECTION [BCM].)
(See DTC INSPECTION.)
(See DTC INSPECTION [INSTRUMENT CLUSTER].)
(See DTC DISPLAY [FULL-AUTO AIR CONDITIONER].)
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.)
(See DTC TABLE [INSTRUMENT CLUSTER].)
(See DTC TABLE [FULL-AUTO AIR CONDITIONER].)
No
Go to the next step.
2
Inspect advanced key battery power status.
(See ADVANCED KEY BATTERY POWER STATUS INSPECTION.)
Is there any battery power status?
Yes
Go to the next step.
No
Replace the new advanced key battery.
(See ADVANCED KEY DISASSEMBLY/ASSEMBLY.)
3
INSPECT THE ELECTROLYTE GRAVITY OF THE SUB BATTERY
•  Inspect the electrolyte gravity of the sub battery.
•  Is the electrolyte gravity of all the cells within the 1.17—1.25 range?
Yes
Recharge the sub battery.
(See BATTERY RECHARGING [MZR 2.0 DISI i-stop].)
Go to the next step.
No
When the electrolyte gravity is 1.16 or less
•  Replace the sub battery.
When the electrolyte gravity is 1.25 or more
•  Go to Step 5.
4
ONCE AGAIN INSPECT THE ELECTROLYTE GRAVITY OF THE SUB BATTERY
•  Once again inspect the electrolyte gravity of the sub battery.
•  Is the electrolyte gravity of all the cells 1.24 or more?
Yes
Drive the vehicle to verify that i-stop operates normally.
•  If i-stop operates normally, the troubleshooting diagnostic procedure is completed.
•  If i-stop does not operate normally, go to the next step.
No
•  Replace the sub battery.
5
INSPECT THE ELECTROLYTE GRAVITY OF THE MAIN BATTERY
•  Inspect the electrolyte specific gravity of the main battery.
•  Is the electrolyte gravity of all the cells within the 1.17—1.22 range?
Yes
Recharge the main battery.
(See BATTERY RECHARGING [MZR 2.0 DISI i-stop].)
Go to the next step.
No
When the electrolyte gravity is 1.16 or less
•  Replace the main battery.
When the electrolyte gravity is 1.22 or more
•  Go to Step 7.
6
ONCE AGAIN INSPECT THE ELECTROLYTE GRAVITY OF THE MAIN BATTERY
•  Once again inspect the electrolyte gravity of the main battery.
•  Is the electrolyte gravity of all the cells 1.21 or more?
Yes
Drive the vehicle to verify that i-stop operates normally.
•  If i-stop operates normally, the troubleshooting diagnostic procedure is completed.
•  If i-stop does not operate normally, go to the next step.
No
•  Replace the main battery.
7
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.
No
Go to the next step.
8
Start the engine and drive the vehicle for 5 min.
Idle the engine.
Access the following PCM PIDs using the M-MDS:
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
•  BATT_TEMP (0—70 °C {32—158 °F})
•  ECT (55 °C {131 °F} or more)
•  IAT (less than 100 °C {212 °F})
•  APP1 (approx. 8%)
•  APP2 (approx. 8%)
Are the PID values out of the i-stop operation range?
Yes
Inspect the related-PID sensor which is out of range and the wiring harness.
Repair or replace the malfunctioning part according to the inspection results.
No
Go to the next step.
9
Switch the ignition to ON.
Compare the ambient temperature sensor on the information display with the actual ambient temperature.
Does the ambient temperature on the information display correspond to the actual ambient temperature?
Yes
Go to Step 11.
No
Go to the next step.
10
Inspect the ambient temperature sensor.
(See AMBIENT TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER].)
Is there any malfunction?
Yes
Replace the ambient temperature sensor.
(See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
No
Inspect the following:
•  Short or open circuit in wiring harness between ambient temperature sensor terminal A and BCM terminal 1X
•  Open circuit in wiring harness between ambient temperature sensor terminal B and BCM terminal 1H
Repair or replace the suspected wiring harness.
11*
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 13.
No
Go to the next step.
12
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].)
No
Repair or replace the wiring harness between i-stop OFF switch terminal I and PCM terminal 1AV for a possible short to ground.
13
Start the engine and warm it up completely.
Idle the engine.
Access the following PCM PIDs using the M-MDS:
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
•  CHG_STAT_A
•  CHG_STAT_B
Are the PID values normal?
(See PCM INSPECTION [MZR 2.0 DISI i-stop].)
Yes
Go to Step 18.
No
If the CHG_STAT_A PID value is not normal:
•  Go to Step 16.
If the CHG_STAT_B PID value is not normal:
•  Go to the next step.
14
Inspect the charge relay.
(See RELAY INSPECTION.)
Is there any malfunction?
Yes
Replace the charge relay.
No
Go to the next step.
15
Inspect the wiring harness between charge relay terminal B and PCM terminal 1L for a short or open circuit.
Is there any malfunction?
Yes
Repair or replace the wiring harness for a possible a short or open circuit.
No
Go to the next step.
16
Recharge the battery for which the monitoring value in Step 8 is not normal.
(See BATTERY RECHARGING [MZR 2.0 DISI i-stop].)
Inspect the battery.
(See BATTERY INSPECTION [MZR 2.0 DISI i-stop].)
Is there any malfunction?
Yes
Replace the battery.
(See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
No
Go to the next step.
17
Inspect the generator.
(See GENERATOR INSPECTION [MZR 2.0 DISI i-stop].)
Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results.
No
Go to the next step.
18
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.
No
Go to the next step.
19*
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 21.
No
Go to the next step.
20
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].)
No
Go to the next step.
21*
Switch the ignition to ON.
Access the following PCM PID using the M-MDS:
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
•  NEUTRAL_SW1
•  NEUTRAL_SW2
Is the PID values congruent with the shift lever operation?
(See PCM INSPECTION [MZR 2.0 DISI i-stop].)
Yes
Go to Step 23.
No
Go to the next step.
22
Inspect the PID-related switch in which the malfunction occurred in Step 17.
(See NEUTRAL SWITCH INSPECTION [MZR 2.0 DISI i-stop].)
Is there any malfunction?
Yes
Replace the applicable switch.
(See NEUTRAL SWITCH NO.1 REMOVAL/INSTALLATION [G66M-R (MZR 2.0 DISI i-stop)].)
(See NEUTRAL SWITCH NO.2 REMOVAL/INSTALLATION [G66M-R (MZR 2.0 DISI i-stop)].)
No
Inspect the wiring harness between the following terminals in which the malfunction occurred in Step 21 for a short to power supply or open circuit:
•  Neutral switch No.1 terminal A—PCM terminal 2AA
•  Neutral switch No.2 terminal A—PCM terminal 1AJ
Repair or replace the suspected wiring harness.
23*
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 25.
No
Go to the next step.
24
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.)
No
Repair or replace the wiring harness between bonnet latch switch terminal A and BCM terminal 1J for a possible open circuit.
25*
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 27.
No
Go to the next step.
26
Inspect the PID-related switch in which the malfunction occurred in Step 21.
(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.)
No
Inspect the following wiring harness in which the malfunction occurred in Step 24:
•  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.
27
Switch the ignition to ON.
Access the SAS control module PID BUCKLE_D using the M-MDS.
(See PID/DATA MONITOR INSPECTION.)
Is the BUCKLE_D PID value congruent with the seat belt condition?
(See PID/DATA MONITOR TABLE.)
Yes
Go to Step 29.
No
Go to the next step.
28
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.)
No
Repair or replace the wiring harness between driver-side buckle switch and SAS control module terminal 2U for a possible short to ground.
29
Position the advanced key in the same position as when the malfunction occurred.
Can the engine be started?
Yes
Go to Step 31.
No
Go to the next step.
30
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.
No
Replace the applicable keyless antenna.
(See KEYLESS ANTENNA REMOVAL/INSTALLATION.)
31
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 33.
No
Go to the next step.
32
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.)
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.
33
Idle the engine.
Access the PCM PID BBP using the M-MDS with the brake pedal held depressed while the i-stop function is operating.
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
Does the BBP PID value remain less than −45 kPa {−0.46 kgf/cm2, −6.5 psi}?
Yes
Go to Step 36.
No
Go to the next step.
34
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.
No
Go to the next step.
35
Inspect the power brake unit vacuum sensor.
(See POWER BRAKE UNIT VACUUM SENSOR INSPECTION [MZR 2.0 DISI i-stop].)
Is there any malfunction?
Yes
Replace the power brake unit vacuum sensor.
(See POWER BRAKE UNIT REMOVAL/INSTALLATION (L.H.D.) [MZR 1.6, MZR 2.0, MZR 2.0 DISI i-stop, MZ-CD 1.6, MZR-CD 2.2].)
(See POWER BRAKE UNIT REMOVAL/INSTALLATION (R.H.D.) [MZR 2.0 DISI i-stop].)
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.
36
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
Replace the PCM.
(See PCM REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
No
Go to the next step.
37
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].)
No
Inspect the air mix actuator and linkage for sticking.
(See A/C UNIT DISASSEMBLY/ASSEMBLY.)
Repair or replace the malfunctioning part according to the inspection results.
38
INSPECT THE CLIMATE CONTROL UNIT
•  Inspect the climate control unit.
•  Is there any malfunction?
Yes
Replace the climate control unit.
(See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
No
Go to the next step.
39
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].)