Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 526

VDC(diag)-3

Basic Diagnostic Procedure

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

5

PERFORM DIAGNOSIS.
1) Refer to “List of Diagnostic Trouble Code
(DTC)”.
NOTE:

For the DTC list, refer to “List of Diagnostic
Trouble Code (DTC)”. <Ref. to VDC(diag)-48,
LIST, List of Diagnostic Trouble Code (DTC).>
2) Correct the cause of trouble.
3) Perform the Clear Memory Mode. <Ref. to
VDC(diag)-27, OPERATION, Clear Memory
Mode.>
4) Perform the Inspection Mode. <Ref. to
VDC(diag)-26, PROCEDURE, Inspection
Mode.>
5) Read the DTC. <Ref. to VDC(diag)-25,
OPERATION, Read Diagnostic Trouble Code
(DTC).>

Is DTC displayed?

Repeat step 5 until
DTC is not shown.

Finish the diagno-
sis.

Step

Check

Yes

No

VDC(diag)-4

Check List for Interview

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

2. Check List for Interview

A: CHECK

Check the following item about the vehicle’s state.

1. STATE OF ABS WARNING LIGHT

ABS warning light
illuminates.

Always
Sometimes
Only once
Does not illuminate

• When/How long does it illuminate?

Ignition key position

LOCK
ACC
ON (Before starting engine)
START
ON (After starting engine, engine is running)
ON (After starting engine, engine is at a standstill)

Timing

Immediately after turning the ignition switch to ON
Immediately after turning the ignition switch to START
When accelerating

—

km/h

—

MPH

While driving at a constant speed

km/h

MPH

While decelerating

—

km/h

—

MPH

When turning to the right

Steering angle:

deg

Steering time:

Sec.

When turning to the left

Steering angle:

deg

Steering time:

Sec.

When other electrical parts are operating

• Part name:
• Operating condition:

VDC(diag)-5

Check List for Interview

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

2. STATE OF VDC WARNING LIGHT & VDC INDICATOR LIGHT

VDC warning light &
VDC indicator light
illuminates.

Always
Sometimes
Only once
Does not illuminate

• When/How long does it illuminate?

Ignition key position

LOCK
ACC
ON (before starting engine)
START
ON (after starting engine, engine is running)
ON (after starting engine, engine is at a standstill)

Timing

Immediately after turning the ignition switch to ON
Immediately after turning the ignition switch to START
While accelerating

—

km/h

—

MPH

While driving at a constant

speed

km/h

MPH

While decelerating

—

km/h

—

MPH

When turning to the right

Steering angle:

deg

Steering time:

Sec.

When turning to the left

Steering angle:

deg

Steering time:

Sec.

When other electrical parts are operating

• Part name:
• Operating condition:

VDC(diag)-6

Check List for Interview

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

3. STATE OF VDC OFF & VDC TRACTION MODE INDICATOR LIGHT

NOTE:

This check list for interview is applied to 6MT model.

The VDC OFF &
VDC traction mode
indicator light illumi-
nates.

Always
Sometimes
Only once
Does not illuminate

• When/How long does it illuminate?

Ignition key position

LOCK
ACC
ON (before starting engine)
START
ON (after starting engine, engine is running)
ON (after starting engine, engine is at a standstill)

Timing

Immediately after turning the ignition switch to ON
Immediately after turning the ignition switch to START
While accelerating

—

km/h

—

MPH

While driving at a constant speed

km/h

MPH

While decelerating

—

km/h

—

MPH

When turning to the right

Steering angle:

deg

Steering time:

Sec.

When turning to the left

Steering angle:

deg

Steering time:

Sec.

When other electrical parts are operating

• Part name:
• Operating condition: