Service Manual2007 Captiva POWER STEERING GEAR

SECTION 6C

POWER STEERING GEAR

Caution : Disconnect the negative battery cable before removing or installing any electrical unit or when a tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwise noted.

SPECIFICATIONS

General Specifications

Application		Description
Capacity		0.63 Liter
Lubricant		Power Steering Fluid DEXRON®-II D
Type		Rack&Pinion
Rack Gain		49.48 mm/rev
Rack Stoke		158 ± 1.6 mm
Steering Angle	Inner	36.5°
Steering Angle	Outer	29.8°

Fastener Tightening Specifications

Application	N•m	Lb-Ft	Lb-In
SSPS Control Module Bracket Bolts	10	7	-
Hydraulic Cylinder Line Fittings - Cylinder End	19	14	-
Hydraulic Cylinder Line Fittings - Valve End	19	14	-
Intermediate Shaft Pinch Bolts - Upper and Lower	34	25	-
Outer Tie Rod Adjusting Nut	60	44	-
Outer Tie Rod Nuts	50	37	-
Steering Gear Inlet and Outlet Pipe Fittings	28	21	-
Steering Gear Mounting Bolts	110	81	-

SPECIAL TOOLS

Special Tools Table

KM-J-26610

Installer

DIAGNOSIS

Power Rack and Pinion Steering Gear

Hissing Noise

Checks	Action
Check the intermediate shaft joints for looseness.	Tighten the intermediate shaft joints.
Check the power steering hose for contact with other components.	Be sure the power steering hose is correctly fitted into the hose clips.

Rattling Noise in Steering Gear

Checks	Action
Check the power steering hose for contact with the body.	Be sure the power steering hose is correctly fitted into the hose clips.
Check the steering gear for insufficient lubrication.	Lubricate the steering gear.
Check the steering gear mounting for improper installation.	Tighten the steering gear mounting bracket nuts and bolts.
Check the outer tie rods for improper installation.	Tighten the outer tie rod joints. Replace the outer tie rods.

Poor Return of Steering Wheel to Center

Checks	Action
Check the steering wheel for contact with the turn signal housing.	Adjust the turn signal housing.
Check the intermediate shaft joints for binding or looseness.	Replace the intermediate shaft.
Check the power steering pump flow control valve for sticking and improper alignment.	Replace the power steering pump.
Check the wheel alignment.	Align the wheels.
Check the wheel bearings for wear or damage.	Replace the wheel bearings.
Check the intermediate shaft joints for improper installation.	Adjust the intermediate shaft between the steering gear and the steering column. Replace the intermediate shaft.
Check the outer tie rods and the ball joints for binding or looseness.	Tighten the tie rods and the ball joints. Replace the tie rods and the ball joints.
Check the steering gear adjustments.	Perform a straight-ahead check.
Check the steering column shaft seal for rubbing on the shaft.	Replace the dash seal.
Check the steering shaft bearings for binding.	Replace the stub shaft bearings.

Momentary Increase in Effort When Turning the Wheel Quickly

Checks	Action
Check the power steering pump for internal leaks.	Replace the power steering pump.
Check the hoses for damage or restricted flow.	Replace the power steering hoses and/or pipes.
Check the power steering fluid level.	Fill the power steering fluid reservoir.
Check the power steering pump flow control valve for sticking and improper operation.	Replace the power steering pump.

Steering Surges or Jerks When Turning with Engine Running

Checks	Action
Check the power steering pump for insufficient pressure.	Replace the power steering pump.
Check the power steering pump flow control valve for sticking and improper operation.	Replace the power steering pump.
Check the power steering pump serpentine belt for slippage.	Tighten the power steering serpentine belt.
Check for air contamination in the power steering system.	Bleed the power steering system.

Steering Vibrates During Low Speed or Static Steering

Checks	Action
Check for air contamination in the power steering system.	Bleed the power steering system.
Check the power steering pump serpentine belt for looseness.	Tighten the power steering serpentine belt.

Excessive Wheel Kickback or Loose Steering

Checks	Action
Check for air contamination in the power steering system.	Bleed the power steering system.
Check the wheel bearings for wear or damage.	Replace the wheel bearings.
Check the steering gear mounting for improper installation.	Tighten the steering gear mounting bracket nuts and bolts.
Check the intermediate shaft joints for improper installation.	Adjust the intermediate shaft between the steering gear and the steering column. Replace the intermediate shaft.
Check the outer tie rods and the ball joints for looseness.	Tighten the tie rods and the ball joints. Replace the tie rods and the ball joints.

Hard Steering or Lack of Assist (Especially During Parking)

Checks	Action
Check the intermediate shaft joints for improper installation.	Adjust the intermediate shaft between the steering gear and the steering column. Replace the coupling flange.
Check the power steering pump flow control valve for sticking and improper installation.	Replace the power steering pump.
Check the power steering pump for insufficient pressure.	Replace the power steering pump.
Check the power steering pump for internal leaks.	Replace the power steering pump.
Check for a loose or a worn intermediate shaft.	Tighten the intermediate shaft. Replace the intermediate shaft, as needed.
Check the power steering pump serpentine belt tension.	Tighten the power steering serpentine belt.

Power Rack and Pinion Steering Gear Bench Testing

Removal, Setup and Testing Procedure

Notice : Pressure checks or pressure and flow checks may also be conducted using this setup.

Disconnect and remove the power steering gear. Refer to "Rack and Pinion Assembly" in this section.
Place the power steering gear on a bench next to the vehicle.
Disconnect the pressure line at the point where the hose connects to the pipe. Extend this line to reach the power steering gear on the bench.
Disconnect the return line from the the power steering fluid reservoir. Extend this line to reach the power steering gear on the bench.
Connect the power steering pipes to the power steering gear.
Start the engine and allow it to idle for 10 seconds.
Check the power steering fluid level. Refer to Section 6A, Power Steering System.
Start the engine and turn the rack and pinion stub shaft a full turn in each direction. Hold the shaft against each stop for 5 seconds.
Inspect for possible leak points. Refer to Section 6A, Power Steering System.

Installation Procedure

Stop the engine.
Disconnect the power steering pipes from the power steering gear.
Remove the extensions and reconnect the pressure and return lines.
Install and connect the power steering gear. Refer to "Rack and Pinion Assembly" in this section.
Start the engine and allow it to idle for 10 seconds.
Check the power steering fluid level. Refer to Section 6A, Power Steering System.

Speed Sensitive Power Steering System

Speed Sensitive Power Steering System Operating With Full Assist at All Times

Step	Action	Value(s)	Yes	No
1	Perform an initial inspection of the power steering system. Is the system operational?	-	Go to Step 2	Go to Section 6A, Power Steering System
2	Install a scan tool. Turn ON the ignition. Check the DTC code by using scan tool. Does the scan tool display any DTCs?	-	Go to Diagnostic Trouble Code (DTC) List	Go to Step 3
3	Check for a poor connection at the ABS control module. Did you find and correct the condition?	-	-	Go to Step 4
4	Turn OFF the ignition. Disconnect the connector of control module wiring. Disconnect the connector of ABS control module. Check the resistance between the terminal 6 of SSPS wiring connector and the terminal 3 of ABS wiring connector. Is the resistance about 0?	≈ 0 Ω	Go to Step 5	Go to Step 6
5	Replace of repair the damaged wiring.	-	-	-
6	Replace the SSPS control module.	-	-	-

Speed Sensitive Power Steering System Operating With Decreased Assist at All Times

Step	Action	Value(s)	Yes	No
1	Check the vehicle speed signal circuit of control module for and open or short to voltage. Did you find and correct the condition?	-	System OK	Go to Step 2
2	Disconnect the SSPS solenoid actuator at the power steering gear. Is the symptom still present?	-	Go to Section 6A, Power Steering System	Go to Step 3
3	Replace the SSPS control module. Is repair complete?	-	System OK	-

General Operation

If IGN is turned ON, the warning lamp blinks three times for 3sec and then OFF.The SSPS control module has the self-diagnostic feature. If any malfunction occurs, the controller illuminates the warning lamp as well as shut off the current to the magnetic coil to result in heavy power steering effort for safety.Trouble codes are displayed and erased by the scan tool.

Diagnostic Trouble Code (DTC) List

DTC	Trouble	Default Action
01	Actuator Circuit Open or Short	Warning lamp ON, Actuator OFF
02	Battery Voltage Out of Range	.

Diagnostic System Check – Speed Sensitive Power Steering

Step	Action	Value(s)	Yes	No
1	Install a scan tool. Turn ON the ignition.	-	Go to Step 2	-
2	Select the SSPS display DTC function on the scan tool. Does the scan tool display any DTCs?	-	Go to Diagnostic Trouble Code(DTC) List	Go to Symptoms – Power Steering System

Diagnostic Trouble Code(DTC) 01

Actuator Circuit Open

Circuit Description

This vehicle uses the speed sensitive power steering(SSPS) system. SSPS system is controlled by SSPS control module. Control module controls steering effort by controlling current(-3~+3A) supplied into magnetic coil that is equipped in teering gear according to vehicle speed variation.

When ignition switch is turned to "ON", the SSPS control module will perform the self-test for about 1.5 seconds(max 3.0s)to diagnose malfunctions in SSPS circuit.

Conditions for Running the DTC

Ignition switch is ON.

Conditions for Setting the DTC

Open between the high and low circuit of the power steering control actuator.
Short between the high and low circuit of the power steering control actuator.
An inoperative power steering control actuator.

Action Taken When the DTC Sets

The SSPS warning light will illuminate.
Power steering assist will default to full power steering effort.
The SSPS will store a DTC 01 in memory.

Conditions for Clearing the DTC

Conditions for the fault are no longer present.
Use the scan tool in order to clear the DTC and cycle the ignition in order to clear the warning lamp.

Diagnostic Aids

Check for the following conditions if a history or intermittent DTC is indicated.

A poor connection at the SSPS. Inspect the harness connectors for backed out terminals, improper mating, improperly formed or damaged terminals, and poor terminal to wire connections.
A damaged wiring harness. Inspect the wiring harness for damages. If the wiring harness appears to be in good condition, observe the display on the multimeter while moving the connectors and wiring harnesses related to the circuits. A change in the multimeter display during the test will indicate the location of the fault.

DTC 01 - Actuator Circuit Open or Short

Step	Action	Value(s)	Yes	No
1	Did you perform the Speed Sensitive Power Steering Diagnostic System Check?	-	Go to Step 2	Go to Diagnostic System Check - Speed Sensitive Power Steering
2	Check for a poor connection at the SSPS control module and SSPS actuator. Did you find and correct the condition?	-	Go to Step 3	-
3	Confirm the ignition switch "OFF" Disconnect the connector of control module wiring. Check the resistance between the terminal 1 and 2 of control module wiring. Is the resistance within specified value?	1.5 - 3.5 Ω	Go to Step 6	Go to Step 4
4	Disconnect the connector of actuator from steering gear. Check the resistance between the terminal 1,2 of control module wiring and terminal A,B of actuator. Is the resistance about 0?	≈ 0 Ω	Go to Step 5	Go to Step 8
5	Check the resistance between the terminal A and B of the actuator. Is the resistance within the specified value?	1.5 - 3.5 Ω	Go to Step 6	Go to Step 7
6	Check the resistance between the terminal 1,2 and the ground. Check the resistance between the terminal 1,2 and the B+. Is the resistance ∞?	∞	Go to Step 11	Go to Step 8
7	Check the short between the terminal A and B of actuator wiring. Is the wiring shorted?	-	Go to Step 9	Go to Step 10
8	Replace or repair the damaged wiring.	-	-	-
9	Repair the actuator wiring.	-	-	-
10	Replace the actuator(steering gear).	-	-	-
11	Replace the SSPS control module.	-	-	-

Diagnostic Trouble Code(DTC) 02

Battery Voltage Out of Range