Kia Carnival (2009+). Manual — part 290

2009 > G 2.7 DOHC >

TROUBLE SHOOTING

Symptom

Probable cause

Remedy

There is no change made in rack
stroke even though turning the VRS
switch ON or OFF.

• VRS operating unit
• VRS control module
• VRS switch

• Inspect the VRS operating unit.
• Check Input/ output signal of the

VRS control module.

• Inspect connection of the VRS

switch.

LED is not illuminated even though
turning the VRS switch ON.

VRS switch

• Inspect connection of the VRS

switch.

• Check the LED for damage.

Inspection of the rack stroke

1. Is the rack stoke (the maximum steering angle) changed when pressing the VRS switch?

▶ The VRS system is in normal condition.

▶ Go to step 2.

2. Measure the resistance of the VRS operating unit.

(1) Disconnect the VRS operating unit connector.

(2) Measure the resistance between the terminal No.1 and No.2.

Repeat the terminal No.3 and No.4.
Is the measured resistance within standard value?

4 ~ 20 ! " Normal condition (standard value)
1 ! or below " Short
100 ! or above " Open circuit

▶ Go to step 3.

▶ Repair or replace the power steering gear box.

3. Measure the output voltage of the VRS control module.

(1) Disconnect the VRS control module connector.

(2) Connect 9 ~ 15 V power between the terminal No.3 and No.4.

(3) Measure the output voltage (to DC motor) between the terminal No.5 ~ 8.

Is the voltage measured within standard value?

Supplied power

Measured output voltage

Standard value

VRS CM failure

9 V

8 V or above

Below 8 V

12 V

11 V or above

Below 11 V

15 V

14 V or above

Below 14 V

▶ Inspect connection of connectors and harness for the VRS system.

▶ Replace the VRS control module.

1. Is the LED on the VRS switch illuminated when turning the VRS switch ON?

▶ The VRS switch has normal condition.

▶ Go to step 2.

2. Inspect the VRS switch connector.

(1) Disconnect the VRS switch connector.

(2) Connect 12 V power between terminal No. 1 (+) and No.3 (-).

Check if the LED is turned ON or OFF by pressing the VRS switch.

Is the LED turned ON or OFF when pressing the VRS switch?

▶ The VRS switch is in normal condition.

▶ Repair or replace the VRS switch.

Steering System

Variable Rack Stroke - VRS Control Unit

Steering System