NO.34 LIMITED i-stop FUNCTION OPERATION TIME [MZR 2.0 DISI i-stop]
id0103d3333900
MTX
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34 |
LIMITED i-stop FUNCTION OPERATION TIME |
|---|---|
|
DESCRIPTION
|
• Frequency of which i-stop function operates is low.
• Frequent occurrence of engine restarting other than for driving vehicle from stop.
|
|
POSSIBLE CAUSE
|
Main battery voltage low during i-stop function operation
• Main battery deterioration
• Insufficient main battery recharge while engine is running
• High electrical load from aftermarket electrical accessories
False detection of engine starting conditions
• False detection of main battery voltage
• False detection of A/C operation conditions
• False detection of rear defroster operation signal
• False detection of low power brake unit load
• False detection of i-stop system non-operation condition (operation cancellation not detected)
False recognition of driver performing engine start operation
• False recognition of depressed clutch pedal
• False recognition of depressed accelerator pedal
|
Diagnostic procedure
|
STEP |
INSPECTION |
RESULTS |
ACTION |
|---|---|---|---|
|
1
|
Retrieve the PCM, BCM, DSC HU/CM, instrument cluster and climate control unit (full-auto air conditioner) DTCs using the M-MDS.
(See DTC INSPECTION [BCM].)
Are any DTCs present?
|
Yes
|
Go to the applicable DTC inspection.
(See DTC TABLE [BCM].)
|
|
No
|
Go to the next step.
|
||
|
2
|
Verify the condition of the i-stop warning light (amber) when the engine restarts.
Does the i-stop warning light (amber) illuminate?
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Yes
|
Go to Step 4.
|
|
No
|
Go to the next step.
|
||
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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 short to ground.
|
||
|
4
|
Switch the ignition to ON.
Access the following PCM PIDs using the M-MDS when the accelerator pedal is not depressed:
• APP1
• APP2
Are the PID values normal?
|
Yes
|
Go to the next step.
|
|
No
|
Replace the APP sensor.
|
||
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5*
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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?
|
Yes
|
Go to Step 7.
|
|
No
|
Go to the next step.
|
||
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6
|
Inspect the clutch stroke sensor.
Is there any malfunction?
|
Yes
|
Replace the clutch stroke sensor.
|
|
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.
|
||
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7
|
Put the vehicle in an idling-stop condition (engine stopped).
Access the PCM PID BBP using the M-MDS with the brake pedal depressed and the engine stopped.
Does the BBP PID value remain less than −45 kPa {−0.46 kgf/cm2, −6.5 psi}?
|
Yes
|
Go to Step 10.
|
|
No
|
Go to the next step.
|
||
|
8
|
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.
|
||
|
9
|
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.
|
||
|
10
|
Remove any non-genuine electrical accessory.
Is the frequency of the engine restarting from the i-stop off condition the same as that of another vehicle of the same model?
|
Yes
|
The system is normal.
• Explain to the customer that the frequency of the engine restarting increases due to the effect of the non-genuine electrical accessory installed.
|
|
No
|
Go to the next step.
|
||
|
11
|
Inspect the main battery.
Is there any malfunction?
|
Yes
|
Go to the next step.
|
|
No
|
Go to Step 14.
|
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|
12
|
Recharge the main battery.
Inspect the main battery again.
Is there any malfunction?
|
Yes
|
Replace the main battery.
|
|
No
|
Go to the next step.
|
||
|
13
|
Inspect the generator.
Is there any malfunction?
|
Yes
|
Repair or replace the malfunctioning part according to the inspection results.
|
|
No
|
Go to the next step.
|
||
|
14*
|
Switch the ignition to ON.
Access the BCM PID R_DEF_SW using the M-MDS.
Does the R_DEF_SW PID value change in conjunction with operating the defroster switch on the panel switch?
(See PID/DATA MONITOR TABLE [BCM].)
|
Yes
|
Go to the next step.
|
|
No
|
Replace the climate control unit.
|
||
|
15
|
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 17.
|
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No
|
Go to the next step.
|
||
|
16*
|
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.
|
||
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17
|
Measure the voltage at the climate control unit terminal 1O while the engine is stopped via i-stop control.
Do the elapsed time and voltage values change?
|
Yes
|
Go to Step 19.
|
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No
|
Go to the next step.
|
||
|
18
|
Inspect the heater core temperature sensor.
Is there any malfunction?
|
Yes
|
Replace the heater core temperature sensor.
|
|
No
|
Repair or replace the wiring harness between heater core temperature sensor terminal B and PCM terminal 1O for a possible short or open circuit.
|
||
|
19
|
Verify the heater core temperature sensor installation condition.
Is the heater core temperature sensor installation condition normal?
|
Yes
|
Replace the PCM.
|
|
No
|
Repair the heater core temperature sensor installation position.
|
||
|
20
|
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
|
34 |
LIMITED i-stop FUNCTION OPERATION TIME |
|---|---|
|
DESCRIPTION
|
• Frequency of which i-stop function operates is low.
• Frequent occurrence of engine restarting other than for driving vehicle from stop.
|
|
POSSIBLE CAUSE
|
Main battery voltage low during i-stop function operation
• Main battery deterioration
• Insufficient main battery recharge while engine is running
• High electrical load from aftermarket electrical accessories
False detection of engine starting conditions
• False detection of main battery voltage
• False detection of A/C operation conditions
• False detection of rear defroster operation signal
• False detection of low power brake unit load
• False detection of depressed brake pedal
• False detection of i-stop system non-operation condition (operation cancellation not detected)
False recognition of driver performing engine start operation
• False detection of shifting
• False detection of released brake pedal
• False recognition of depressed accelerator pedal
• False detection of steering wheel operation
|
Diagnostic procedure
|
STEP |
INSPECTION |
RESULTS |
ACTION |
|---|---|---|---|
|
1
|
Retrieve the PCM, TCM, BCM, DSC HU/CM, instrument cluster and climate control unit (full-auto air conditioner) DTCs using the M-MDS.
(See DTC INSPECTION [BCM].)
Are any DTCs present?
|
Yes
|
Go to the applicable DTC inspection.
(See DTC TABLE [BCM].)
|
|
No
|
Go to the next step.
|
||
|
2
|
Verify the condition of the i-stop warning light (amber) when the engine restarts.
Does the i-stop warning light (amber) 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 short to ground.
|
||
|
4
|
Remove any non-genuine electrical accessory.
Is the frequency of the engine restarting from the i-stop off condition the same as that of another vehicle of the same model?
|
Yes
|
The system is normal.
• Explain to the customer that the frequency of the engine restarting increases due to the effect of the non-genuine electrical accessory installed.
|
|
No
|
Go to the next step.
|
||
|
5
|
Switch the ignition to ON.
Access the following PCM PIDs using the M-MDS when the accelerator pedal is not depressed:
• APP1
• APP2
Are the PID values normal?
|
Yes
|
Go to the next step.
|
|
No
|
Replace the APP sensor.
|
||
|
6*
|
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 8.
|
|
No
|
Adjust the TR switch and verify the PID values again.
• If the PID values are normal:
• If the PID values are not normal:
|
||
|
7
|
Inspect the TR switch.
Is there any malfunction?
|
Yes
|
Replace the TR switch.
|
|
No
|
Repair or replace the wiring harness between TR switch and TCM terminal U for a possible open or short circuit.
|
||
|
8
|
Switch the ignition to ON.
Access the TCM PID MNL_SW using the M-MDS.
Is the PID value normal?
|
Yes
|
Go to Step 10.
|
|
No
|
Go to the next step.
|
||
|
9
|
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.
|
||
|
10
|
Put the vehicle in an idling-stop condition (engine stopped).
Access the PCM PID BBP using the M-MDS with the brake pedal depressed and the engine stopped.
Does the BBP PID value remain less than −45 kPa {−0.46 kgf/cm2, −6.5 psi}?
|
Yes
|
Go to Step 13.
|
|
No
|
Go to the next step.
|
||
|
11
|
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.
|
||
|
12
|
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.
|
||
|
13
|
Put the vehicle in i-stop.
Monitor the DSC HU/CM PID BFP using the M-MDS while the brake is depressed and held with the i-stop function operating.
Does the monitoring value change?
|
Yes
|
Brake fluid pressure sensor malfunction.
• Replace the DSC HU/CM.
|
|
No
|
Go to the next step.
|
||
|
14
|
Switch the ignition to ON.
Access the EHPAS PID STEER_RATE using the M-MDS.
Is the PID value normal?
|
Yes
|
Go to Step 16.
|
|
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:
|
||
|
15
|
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.
|
||
|
16
|
Inspect the main battery.
Is there any malfunction?
|
Yes
|
Go to the next step.
|
|
No
|
Go to Step 19.
|
||
|
17
|
Recharge the main battery.
Inspect the main battery again.
Is there any malfunction?
|
Yes
|
Replace the main battery.
|
|
No
|
Go to the next step.
|
||
|
18
|
Inspect the generator.
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 BCM PID R_DEF_SW using the M-MDS.
Does the R_DEF_SW PID value change in conjunction with operating the defroster switch on the panel switch?
(See PID/DATA MONITOR TABLE [BCM].)
|
Yes
|
Go to the next step.
|
|
No
|
Replace the climate control unit.
|
||
|
20
|
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 22.
|
|
No
|
Go to the next step.
|
||
|
21*
|
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.
|
||
|
22
|
Measure the voltage at the climate control unit terminal 1O while the engine is stopped via i-stop control.
Do the elapsed time and voltage values change?
|
Yes
|
Go to Step 24.
|
|
No
|
Go to the next step.
|
||
|
23
|
Inspect the heater core temperature sensor.
Is there any malfunction?
|
Yes
|
Replace the heater core temperature sensor.
|
|
No
|
Repair or replace the wiring harness between heater core temperature sensor terminal B and PCM terminal 1O for a possible short or open circuit.
|
||
|
24
|
Verify the heater core temperature sensor installation condition.
Is the heater core temperature sensor installation condition normal?
|
Yes
|
Replace the PCM.
|
|
No
|
Repair the heater core temperature sensor installation position.
|
||
|
25
|
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.
|
||