NO.32 i-stop FUNCTION OPERATES UNDER NO ENGINE-STOP CONDITIONS [MZR 2.0 DISI i-stop]
id0103d3333700
MTX
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32 |
i-stop FUNCTION OPERATES UNDER NO ENGINE-STOP CONDITIONS |
|---|---|
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DESCRIPTION
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• i-stop function operates even though system is turned off by pressing i-stop OFF switch.
• i-stop function operates even though vehicle conditions are for non-operation.
• i-stop function operates frequently while parking vehicle.
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|
POSSIBLE CAUSE
|
False detection of i-stop function operation conditions
• False detection of operating i-stop system
• False detection of stopped vehicle
• Falsely detects that driver intends to stop vehicle
• False detection of shift lever in neutral position
• False detection of depressed clutch pedal
• False detection of internal/external vehicle temperature within operable range (−10 to 50 °C {14 to 122 °F})
• Falsely detects that climate control unit detects that driver-side air mix door is not in MAX HOT or MAX COLD position even though driver-side air mix door is in MAX HOT or MAX COLD position
• False detection of non-operating rear defroster
• False detection of vehicle not being parked
• False detection of low power brake unit load
• Falsely detects that vehicle is under safety condition
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Diagnostic procedure
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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 DTC INSPECTION [BCM].)
(See DTC INSPECTION [TYPE A].)
(See DTC INSPECTION [TYPE B].)
Are any DTCs present?
|
Yes
|
Go to the applicable DTC inspection.
(See DTC TABLE [BCM].)
(See DTC TABLE [TYPE A].)
(See DTC TABLE [TYPE B].)
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No
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Go to the next step.
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||
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2
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Start the engine.
Verify the i-stop warning light illumination condition when the i-stop OFF switch is pressed.
Does the i-stop warning light illuminate?
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Yes
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Go to Step 4.
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No
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Go to the next step.
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3
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Inspect the i-stop OFF switch.
Is there any malfunction?
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Yes
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Replace the i-stop OFF switch.
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No
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Repair or replace the wiring harness between i-stop OFF switch terminal I and PCM terminal 1AV for a possible open circuit.
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4
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Perform the initialization of the steering angle sensor.
Has the malfunction symptom been eliminated?
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Yes
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Malfunction caused by the steering angle sensor initialization malfunction.
• Symptom troubleshooting is completed.
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|
No
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Go to the next step.
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||
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5*
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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?
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Yes
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Go to Step 7.
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No
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Go to the next step.
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||
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6
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Inspect the ambient temperature sensor.
Is there any malfunction?
|
Yes
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Replace the ambient temperature sensor.
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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.
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||
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7
|
Inspect the sensor output value from the ABS wheel-speed sensor.
Is there any malfunction?
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Yes
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Repair or replace the malfunctioning part according to the inspection results.
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No
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Go to the next step.
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||
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8*
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Switch the ignition to ON.
Access the PCM PID CPP using the M-MDS.
Does the CPP PID value change according to the amount the clutch pedal is depressed?
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Yes
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Go to Step 10.
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No
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Go to the next step.
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9
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Inspect the clutch stroke sensor.
Is there any malfunction?
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Yes
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Replace the clutch stroke sensor.
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No
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Repair or replace the wiring harness between clutch stroke sensor terminal B and PCM terminal 1AS for a possible short to ground.
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10*
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Switch the ignition to ON.
Access the following PCM PID using the M-MDS:
• NEUTRAL_SW1
• NEUTRAL_SW2
Is the PID values congruent with the shift lever operation?
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Yes
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Go to Step 12.
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No
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Go to the next step.
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11
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Inspect the PID-related switch in which the malfunction occurred in Step 10.
Is there any malfunction?
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Yes
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Replace the applicable switch.
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No
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Inspect the wiring harness between the following terminals in which the malfunction occurred in Step 10 for a short to ground:
• 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.
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12*
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Switch the ignition to ON.
Access the BCM PID HOOD_SW using the M-MDS.
Is the HOOD_SW PID value normal?
(See PID/DATA MONITOR TABLE [BCM].)
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Yes
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Go to Step 14.
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No
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Go to the next step.
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13
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Inspect the bonnet latch switch.
Is there any malfunction?
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Yes
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Replace the bonnet latch switch.
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No
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Repair or replace the wiring harness between bonnet latch switch terminal A and BCM terminal 1J for a possible short to ground.
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14*
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Switch the ignition to ON.
Access the following BCM PIDs using the M-MDS:
• 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].)
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Yes
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Go to Step 16.
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No
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Go to the next step.
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15
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Inspect the PID-related switch in which the malfunction occurred in Step 14.
Is there any malfunction?
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Yes
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Replace the applicable switch.
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No
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Inspect the following in which the malfunction occurred in Step 14:
• Short to ground in wiring harness between door latch switch and BCM
• Open circuit in wiring harness between liftgate/trunk lid latch switch and BCM
Repair or replace the suspected wiring harness.
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||
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16*
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Switch the ignition to ON.
Access the SAS control module PID BUCKLE_D using the M-MDS.
Is the BUCKLE_D PID value congruent with the seat belt condition?
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Yes
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Go to Step 18.
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No
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Go to the next step.
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17
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Inspect the driver-side buckle switch.
(See BUCKLE SWITCH INSPECTION.)
Is there any malfunction?
|
Yes
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Replace the driver-side buckle switch.
|
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No
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Repair or replace the wiring harness between driver-side buckle switch and SAS control module terminal 2M for a possible open circuit.
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18*
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Switch the ignition to ON.
Access the EHPAS PID STEER_RATE using the M-MDS.
Is the PID value normal?
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Yes
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Go to Step 20.
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No
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Perform the initialization of the steering angle sensor and verify the PID values again.
• If the PID values are normal:
• If the PID values are not normal:
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19
|
Inspect the steering angle sensor.
Is there any malfunction?
|
Yes
|
Replace the steering angle sensor.
|
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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.
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||
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20*
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Switch the ignition to ON.
Access the BCM PID R_DEF_SW using the M-MDS.
Does the R_DEF_SW PID value change according to the defroster switch operation?
(See PID/DATA MONITOR TABLE [BCM].)
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Yes
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Go to the next step.
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No
|
Replace the climate control unit.
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21*
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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.
Does the BBP PID value remain less than −45 kPa {−0.46 kgf/cm2, −6.5 psi}?
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Yes
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Go to Step 24.
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No
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Go to the next step.
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22
|
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.
|
||
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23
|
Inspect the power brake unit vacuum sensor.
(See POWER BRAKE UNIT INSPECTION.)
Is there any malfunction?
|
Yes
|
Replace the power brake unit vacuum sensor.
|
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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.
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||
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24
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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?
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Yes
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Replace the PCM.
|
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No
|
Go to the next step.
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||
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25
|
Inspect the driver-side air mix actuator.
Is there any malfunction?
|
Yes
|
Replace the driver-side air mix actuator.
|
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No
|
Inspect the air mix actuator and linkage for sticking.
Repair or replace the malfunctioning part according to the inspection results.
|
||
|
26
|
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.
|
||
ATX
|
32 |
i-stop FUNCTION OPERATES UNDER NO ENGINE-STOP CONDITIONS |
|---|---|
|
DESCRIPTION
|
• i-stop function operates even though system is turned off by pressing i-stop OFF switch.
• i-stop function operates even though vehicle conditions are for non-operation.
• i-stop function operates frequently while parking vehicle.
|
|
POSSIBLE CAUSE
|
False detection of i-stop function operation conditions
• False detection of operating i-stop system
• False detection of stopped vehicle
• Falsely detects that driver intends to stop vehicle
• False detection of selector lever in D range
• False detection of not in M position
• False detection of internal/external vehicle temperature within operable range (−10 to 50 °C {14 to 122 °F})
• Climate control unit falsely detects that internal vehicle temperature is within operation range.
• Falsely detects that climate control unit detects that driver-side air mix door is not in MAX HOT or MAX COLD position even though driver-side air mix door is in MAX HOT or MAX COLD position
• False detection of non-operating rear defroster
• False detection of vehicle not being parked
|
|
POSSIBLE CAUSE
|
• Falsely detects that vehicle is under safety condition
|
Diagnostic procedure
|
STEP |
INSPECTION |
RESULTS |
ACTION |
|---|---|---|---|
|
1
|
Retrieve the PCM, TCM, BCM, SAS control module, instrument cluster and climate control unit (full-auto air conditioner) DTCs using the M-MDS.
(See DTC INSPECTION [BCM].)
(See DTC INSPECTION [TYPE B].)
Are any DTCs present?
|
Yes
|
Go to the applicable DTC inspection.
(See DTC TABLE [BCM].)
(See DTC TABLE [TYPE B].)
|
|
No
|
Go to the next step.
|
||
|
2
|
Start the engine.
Verify the i-stop warning light illumination condition when the i-stop OFF switch is pressed.
Does the i-stop warning light illuminate?
|
Yes
|
Go to Step 4.
|
|
No
|
Go to the next step.
|
||
|
3
|
Inspect the i-stop OFF switch.
Is there any malfunction?
|
Yes
|
Replace the i-stop OFF switch.
|
|
No
|
Repair or replace the wiring harness between i-stop OFF switch terminal I and PCM terminal 1AV for a possible open circuit.
|
||
|
4
|
Perform the initialization of the low-G (XY) sensor and steering angle sensor.
Has the malfunction symptom been eliminated?
|
Yes
|
Malfunction caused by the low-G (XY) sensor or steering angle sensor initialization malfunction.
• Symptom troubleshooting is completed.
|
|
No
|
Go to the next step.
|
||
|
5*
|
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 7.
|
|
No
|
Go to the next step.
|
||
|
6
|
Inspect the ambient temperature sensor.
Is there any malfunction?
|
Yes
|
Replace the ambient temperature sensor.
|
|
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.
|
||
|
7
|
Inspect the sensor output value from the ABS wheel-speed sensor.
Is there any malfunction?
|
Yes
|
Repair or replace the malfunctioning part according to the inspection results.
|
|
No
|
Go to the next step.
|
||
|
8*
|
Switch the ignition to ON.
Access the TCM PID TR using the M-MDS.
Is the TR PID value changing normally according to selector lever position?
|
Yes
|
Go to Step 10.
|
|
No
|
Adjust the TR switch and verify the PID values again.
• If the PID values are not normal:
• If the PID values are normal:
|
||
|
9
|
Inspect the TR switch.
Is there any malfunction?
|
Yes
|
Replace the TR switch.
|
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No
|
Repair or replace the wiring harness between TR switch and TCM terminal U for a possible open or short circuit.
|
||
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10*
|
Switch the ignition to ON.
Access the TCM PID MNL_SW using the M-MDS.
Is the PID value normal?
|
Yes
|
Go to Step 12.
|
|
No
|
Go to the next step.
|
||
|
11
|
Inspect the M range switch.
Is there any malfunction?
|
Yes
|
Replace the M range switch.
|
|
No
|
Repair or replace the wiring harness between selector lever component and TCM terminal K for a possible open or short circuit.
|
||
|
12*
|
Switch the ignition to ON.
Access the BCM PID HOOD_SW using the M-MDS.
Is the HOOD_SW PID value normal?
(See PID/DATA MONITOR TABLE [BCM].)
|
Yes
|
Go to Step 14.
|
|
No
|
Go to the next step.
|
||
|
13
|
Inspect the bonnet latch switch.
Is there any malfunction?
|
Yes
|
Replace the bonnet latch switch.
|
|
No
|
Repair or replace the wiring harness between bonnet latch switch terminal A and BCM terminal 1J for a possible short to ground.
|
||
|
14*
|
Switch the ignition to ON.
Access the following BCM PIDs using the M-MDS:
• 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 16.
|
|
No
|
Go to the next step.
|
||
|
15
|
Inspect the PID-related switch in which the malfunction occurred in Step 14.
Is there any malfunction?
|
Yes
|
Replace the applicable switch.
|
|
No
|
Inspect the following in which the malfunction occurred in Step 14:
• Short to ground in wiring harness between door latch switch and BCM
• Open circuit in wiring harness between liftgate/trunk lid latch switch and BCM
Repair or replace the suspected wiring harness.
|
||
|
16*
|
Switch the ignition to ON.
Access the SAS control module PID BUCKLE_D using the M-MDS.
Is the BUCKLE_D PID value congruent with the seat belt condition?
|
Yes
|
Go to Step 18.
|
|
No
|
Go to the next step.
|
||
|
17
|
Inspect the driver-side buckle switch.
(See BUCKLE SWITCH INSPECTION.)
Is there any malfunction?
|
Yes
|
Replace the driver-side buckle switch.
|
|
No
|
Repair or replace the wiring harness between driver-side buckle switch and SAS control module terminal 2M for a possible open circuit.
|
||
|
18
|
Switch the ignition to ON.
Access the EHPAS PID STEER_RATE using the M-MDS.
Is the PID value normal?
|
Yes
|
Go to Step 20.
|
|
No
|
Perform the initialization of the steering angle sensor and verify the PID values again.
• If the PID values are normal:
• If the PID values are not normal:
|
||
|
19*
|
Inspect the steering angle sensor.
Is there any malfunction?
|
Yes
|
Replace the steering angle sensor.
|
|
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.
|
||
|
20*
|
Switch the ignition to ON.
Access the BCM PID R_DEF_SW using the M-MDS.
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.
|
|
No
|
Replace the climate control unit.
|
||
|
21*
|
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 23.
|
|
No
|
Go to the next step.
|
||
|
22
|
Inspect the information display.
Is there any malfunction?
|
Yes
|
Repair or replace the malfunctioning part according to the inspection results.
|
|
No
|
Replace the climate control unit.
|
||
|
23
|
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.
Does the BBP PID value remain less than −45 kPa {−0.46 kgf/cm2, −6.5 psi}?
|
Yes
|
Go to Step 26.
|
|
No
|
Go to the next step.
|
||
|
24
|
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.
|
||
|
25
|
Inspect the power brake unit vacuum sensor.
(See POWER BRAKE UNIT INSPECTION.)
Is there any malfunction?
|
Yes
|
Replace the power brake unit vacuum sensor.
|
|
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.
|
||
|
26
|
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?
|
Yes
|
Go to Step 28.
|
|
No
|
Go to the next step.
|
||
|
27
|
Inspect the driver-side air mix actuator.
Is there any malfunction?
|
Yes
|
Replace the driver-side air mix actuator.
|
|
No
|
Inspect the air mix actuator and linkage for sticking.
Repair or replace the malfunctioning part according to the inspection results.
|
||
|
28
|
Access the climate control unit PID CABIN TEMP using the M-MDS.
Does the CABIN TEMP PID value indicate the actual cabin temperature of the vehicle?
|
Yes
|
Replace the PCM.
|
|
No
|
Go to the next step.
|
||
|
29
|
Inspect the cabin temperature sensor.
Is there any malfunction?
|
Yes
|
Replace the cabin temperature sensor.
|
|
No
|
Inspect the wiring harness between the following terminals for a short or open circuit:
• Cabin temperature sensor terminal D—Climate control unit terminal 2M
• Cabin temperature sensor terminal B—Climate control unit terminal 2N
• Cabin temperature sensor terminal A—Relay block terminal 1F (IG2)
• Cabin temperature sensor terminal C—Body ground
Repair or replace the suspected wiring harness.
|
||
|
30
|
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.
|
||