NO.7 HILL LAUNCH ASSIST (HLA) OPERATES EVEN ON A DOWNHILL/HILL LAUNCH ASSIST (HLA) DOES NOT OPERATE ON A SLOPE [DYNAMIC STABILITY CONTROL (DSC)]

7	Hill launch assist (HLA) operates even on a downhill Hill launch assist (HLA) does not operate on a slope
POSSIBLE CAUSE	Note • HLA operates on an up slope of about 3.5% or more when selector lever is in any position except reverse. • HLA operates on a down slope of about 3.5% or more when selector lever is in reverse. • HLA operates for a maximum of 2 s after releasing brake pedal. • DSC HU/CM detects a malfunction (Input/output device malfunction). • PCM and BCM detect a malfunction. • SAS control module installation malfunction (If there is a malfunction resulting from SAS control module removal, HLA may not operate at desired inclination angle.) • Tire malfunction (Differing air pressure on four wheels, use of tires with differing conditions of wear) • DSC HU/CM initial setting and low-G (XY) sensor initialization have not been performed after replacing DSC HU/CM and SAS control module. (If initial setting and initialization are not performed, HLA may not operate at desired inclination angle.) • After replacing DSC HU/CM or steering angle sensor initialization is not performed. (If initialization is not performed, HLA may not work correctly.) • Center point of low-G (XY) sensor has deviated. • Input signal malfunction from ABS wheel-speed sensor • Input signal malfunction from PCM (Engine torque signal, engine speed signal, accelerator pedal position signal, clutch pedal signal) • Input signal malfunction from BCM (Parking brake signal, reverse gear signal) • Communication error between DSC HU/CM and PCM • Communication error between DSC HU/CM and BCM • Brake (foot brake/parking brake) drag

Hill launch assist (HLA) operates even on a downhill

Hill launch assist (HLA) does not operate on a slope

POSSIBLE CAUSE

Note

• HLA operates on an up slope of about 3.5% or more when selector lever is in any position except reverse.

• HLA operates on a down slope of about 3.5% or more when selector lever is in reverse.

• HLA operates for a maximum of 2 s after releasing brake pedal.

• DSC HU/CM detects a malfunction (Input/output device malfunction).

• PCM and BCM detect a malfunction.

• SAS control module installation malfunction (If there is a malfunction resulting from SAS control module removal, HLA may not operate at desired inclination angle.)

• Tire malfunction (Differing air pressure on four wheels, use of tires with differing conditions of wear)

• DSC HU/CM initial setting and low-G (XY) sensor initialization have not been performed after replacing DSC HU/CM and SAS control module. (If initial setting and initialization are not performed, HLA may not operate at desired inclination angle.)

• After replacing DSC HU/CM or steering angle sensor initialization is not performed. (If initialization is not performed, HLA may not work correctly.)

• Center point of low-G (XY) sensor has deviated.

• Input signal malfunction from ABS wheel-speed sensor

• Input signal malfunction from PCM (Engine torque signal, engine speed signal, accelerator pedal position signal, clutch pedal signal)

• Input signal malfunction from BCM (Parking brake signal, reverse gear signal)

• Communication error between DSC HU/CM and PCM

• Communication error between DSC HU/CM and BCM

• Brake (foot brake/parking brake) drag

STEP	INSPECTION	ACTION
1	VERIFY DTCs FOR RELATED MODULES • Retrieve the DSC HU/CM, PCM and BCM DTC using the M-MDS. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) (See ON-BOARD DIAGNOSTIC TEST [MZR 1.8, MZR 2.0, MZR 2.5].) (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].) (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) (See DTC INSPECTION [BCM].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) (See DTC TABLE [MZR 1.8, MZR 2.0, MZR 2.5].) (See DTC TABLE [MZR 2.0 DISI].) (See DTC TABLE [MZR-CD 2.2].) (See DTC TABLE [BCM].)
No	Go to the next step.
2	VERIFY IF FALSE DETECTION OF INCLINATION ANGLE CAUSED BY MALFUNCTIONING SAS CONTROL MODULE INSTALLATION • Inspect the SAS control module installation condition for the following: ― Is the module installed with any twisting? ― Is the module installed correctly?	Yes	Go to the next step.
No	Repair the SAS control module installation condition.
3	VERIFY IF MALFUNCTION CAUSED BY INITIALIZATION PROCEDURE FOR MODULE NOT PERFORMED • Verify if malfunction caused by initialization procedure for module not performed. • Has the initial setting for the DSC HU/CM been performed after replacing the DSC HU/CM and the SAS control module?	Yes	Go to the next step.
No	Perform the DSC HU/CM initial setting. (See DSC CONFIGURATION.)
4	VERIFY IF MALFUNCTION CAUSED BY INITIALIZATION PROCEDURE FOR LOW-G (X/Y) SENSOR NOT PERFORMED • Verify if malfunction caused by initialization procedure for low-G (XY) sensor not performed. • Has the initial setting for the low-G (XY) sensor been performed after replacing the DSC HU/CM and the SAS control module?	Yes	Go to the next step.
No	Perform the low-G (XY) sensor initial setting. (See DSC SENSOR INITIALIZATION PROCEDURE.)
5	VERIFY IF MALFUNCTION CAUSED BY INITIALIZATION PROCEDURE FOR STEERING ANGLE SENSOR NOT PERFORMED • Verify if malfunction caused by initialization procedure for steering angle sensor not performed. • Has the initial setting for the steering angle sensor been performed after replacing the DSC HU/CM and/or steering angle sensor?	Yes	Go to the next step.
No	Perform the DSC HU/CM initial setting. (See DSC CONFIGURATION.)
6	VERIFY IF MALFUNCTION CAUSED BY TIRE MALFUNCTION PERFORMED • Inspect the tire pressure and condition. • Are tire pressure and condition normal?	Yes	Go to the next step.
No	If the pressure is incorrect, adjust the tire pressure to the specification. If the tires are worn, replace the tires.
7	INSPECT RELATED MODULES FOR MALFUNCTION CAUSED BY FALSE SIGNAL • Access the following DSC HU/CM, PCM and BCM PIDs using the M-MDS: (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) (See ON-BOARD DIAGNOSTIC TEST [MZR 1.8, MZR 2.0, MZR 2.5].) (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].) (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) (See PID/DATA MONITOR INSPECTION [BCM].) DSC HU/CM ― BRAKE_SW (brake signal) ― LAT_ACCL (low-G (XY) sensor signal) ― MCYLI_P (master cylinder pressure signal) ― WSPD_LF (ABS wheel-speed sensor (LF) signal) ― WSPD_RF (ABS wheel-speed sensor (RF) signal) ― WSPD_LR (ABS wheel-speed sensor (LR) signal) ― WSPD_RR (ABS wheel-speed sensor (RR) signal) PCM ― RPM (Engine speed signal) ― APP (Accelerator pedal position signal) ― CPP (Clutch pedal signal) BCM ― PRK_BRK (Parking brake signal) ― R_GEAR_SW (Reverse gear signal) • Are all PID values normal? (See PCM INSPECTION [MZR 1.8, MZR 2.0, MZR 2.5].) (See PCM INSPECTION [MZR 2.0 DISI].) (See PCM INSPECTION [MZR-CD 2.2].) (See PID/DATA MONITOR TABLE [BCM].)	Yes	Inspect the following: • Brake (foot brake/parking brake) drag • Engine output malfunction Repair or replace any malfunctioning parts according to the inspection result.
No	Inspect the related parts and wiring harness. Repair or replace any malfunctioning parts according to the inspection result.

STEP

INSPECTION

ACTION

VERIFY DTCs FOR RELATED MODULES

• Retrieve the DSC HU/CM, PCM and BCM DTC using the M-MDS.

(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)

(See ON-BOARD DIAGNOSTIC TEST [MZR 1.8, MZR 2.0, MZR 2.5].)

(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].)

(See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)

(See DTC INSPECTION [BCM].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)

(See DTC TABLE [MZR 1.8, MZR 2.0, MZR 2.5].)

(See DTC TABLE [MZR 2.0 DISI].)

(See DTC TABLE [MZR-CD 2.2].)

(See DTC TABLE [BCM].)

Go to the next step.

VERIFY IF FALSE DETECTION OF INCLINATION ANGLE CAUSED BY MALFUNCTIONING SAS CONTROL MODULE INSTALLATION

• Inspect the SAS control module installation condition for the following:

― Is the module installed with any twisting?

― Is the module installed correctly?

Yes

Go to the next step.

Repair the SAS control module installation condition.

VERIFY IF MALFUNCTION CAUSED BY INITIALIZATION PROCEDURE FOR MODULE NOT PERFORMED

• Verify if malfunction caused by initialization procedure for module not performed.

• Has the initial setting for the DSC HU/CM been performed after replacing the DSC HU/CM and the SAS control module?

Yes

Go to the next step.

Perform the DSC HU/CM initial setting.

(See DSC CONFIGURATION.)

VERIFY IF MALFUNCTION CAUSED BY INITIALIZATION PROCEDURE FOR LOW-G (X/Y) SENSOR NOT PERFORMED

• Verify if malfunction caused by initialization procedure for low-G (XY) sensor not performed.

• Has the initial setting for the low-G (XY) sensor been performed after replacing the DSC HU/CM and the SAS control module?

Yes

Go to the next step.

Perform the low-G (XY) sensor initial setting.

(See DSC SENSOR INITIALIZATION PROCEDURE.)

VERIFY IF MALFUNCTION CAUSED BY INITIALIZATION PROCEDURE FOR STEERING ANGLE SENSOR NOT PERFORMED

• Verify if malfunction caused by initialization procedure for steering angle sensor not performed.

• Has the initial setting for the steering angle sensor been performed after replacing the DSC HU/CM and/or steering angle sensor?

Yes

Go to the next step.

Perform the DSC HU/CM initial setting.

(See DSC CONFIGURATION.)

VERIFY IF MALFUNCTION CAUSED BY TIRE MALFUNCTION PERFORMED

• Inspect the tire pressure and condition.

• Are tire pressure and condition normal?

Yes

Go to the next step.

If the pressure is incorrect, adjust the tire pressure to the specification.

If the tires are worn, replace the tires.

INSPECT RELATED MODULES FOR MALFUNCTION CAUSED BY FALSE SIGNAL

• Access the following DSC HU/CM, PCM and BCM PIDs using the M-MDS:

(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)

(See ON-BOARD DIAGNOSTIC TEST [MZR 1.8, MZR 2.0, MZR 2.5].)

(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].)

(See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)

(See PID/DATA MONITOR INSPECTION [BCM].)

DSC HU/CM

― BRAKE_SW (brake signal)

― LAT_ACCL (low-G (XY) sensor signal)

― MCYLI_P (master cylinder pressure signal)

― WSPD_LF (ABS wheel-speed sensor (LF) signal)

― WSPD_RF (ABS wheel-speed sensor (RF) signal)

― WSPD_LR (ABS wheel-speed sensor (LR) signal)

― WSPD_RR (ABS wheel-speed sensor (RR) signal)

PCM

― RPM (Engine speed signal)

― APP (Accelerator pedal position signal)

― CPP (Clutch pedal signal)

BCM

― PRK_BRK (Parking brake signal)

― R_GEAR_SW (Reverse gear signal)

• Are all PID values normal?

(See PCM INSPECTION [MZR 1.8, MZR 2.0, MZR 2.5].)

(See PCM INSPECTION [MZR 2.0 DISI].)

(See PCM INSPECTION [MZR-CD 2.2].)

(See PID/DATA MONITOR TABLE [BCM].)

Yes

Inspect the following:

• Brake (foot brake/parking brake) drag

• Engine output malfunction

Repair or replace any malfunctioning parts according to the inspection result.

Inspect the related parts and wiring harness.

Repair or replace any malfunctioning parts according to the inspection result.