Steering - General Diagnostics and Tests: Other Volvo XC90 I

CHECKING FOR OPEN-CIRCUITS, CONTACT RESISTANCE AND OXIDATION

For the control module , check ground terminal 31/84 and the wiring connected to it. Check for an open-circuit. See OPEN-CIRCUIT, PERMANENT FAULTS . Check for contact resistance and oxidation. See CONTACT RESISTANCE AND OXIDATION .

1. Continue Refer to «VERIFICATION»(ref-476731-S23084101942012060500000)

VERIFICATION

1. Ignition off
2. the control module disconnected.
3. Switch off all equipment that takes power from the battery (courtesy lighting, radio etc). For the control module , connect an ohmmeter between terminal #16 on the breakout box and the battery negative terminal.

The ohmmeter should read 0 ohms.

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «INFORMATION»(ref-476731-S16040183102012060500000)

Scheme 5

An open-circuit in a cable is indicated by a loss of one or more functions.

Chafed and broken cables or terminals that have come loose are common causes of faults in electrical systems.

Checks

1. Disconnect the connectors at both ends of the cable.

Connect an ohmmeter between the ends of the cable.

The ohmmeter should read approximately 0 ohms if there is no open-circuit in the cable.

Scheme 6

Always check the control module and control module box connectors to ensure that their pins and sockets are not bent or damaged, as this can cause faults.

Check pins and terminals particularly for this fault. See CHECK TERMINALS VISUALLY .

Scheme 7

In theory, the resistance across contacts, leads and terminals should be 0 ohms. However, there is always some resistance due to terminal oxidation.

If this resistance becomes too great the result will be a malfunction. The magnitude of the resistance before it causes a malfunction depends on the circuit load.

Checks

1. Check the cables visually according to. See «CHECK TERMINALS VISUALLY»(ref-476731-S12328476632012062700000)

Cleaning female socket terminals and male pin terminals

Scheme 8

Note. Do not apply rust solvent spray or grease to the catalyst monitor sensor or instrument cluster connectors.

1. Ignition off
2. Disconnect the battery negative terminal
3. Use compressed air to clean the disconnected connector
4. Apply rust solvent spray 1161422 to the disconnected connectors
5. Blow clean using compressed air.

Greasing female terminals

Scheme 9

Note. Note Do not fill the protective cover with grease.

1. Press grease, P/N 1161417-9, into the female sockets directly from tube
2. Check that all the terminal cavities are filled
3. Use a loose male pin to ensure that the connection in the sockets is good. The pin should remain in position when pulled gently.

Scheme 10

Scheme 11

Note. When checking the engine control module (ECM), do not remove the control module from the car before the main relay has interrupted the power supply. This may take up to 4 minutes after the ignition has been switched off and the engine cooling fan (FC) has stopped running.

Inspect the terminals visually when checking, or taking readings from, opened connectors.

Checks

1. Check for oxidation. This can cause poor connections in the terminals
2. Check for damage to pins and terminals. Check that they are properly inserted into the connector. Check that the cable is properly connected to the pin or terminal. Check pins and terminals particularly carefully
3. Use a separate male terminal to check the female terminal. Check that they are secure: Pull on the pin.

FAULT-TRACING INFORMATION

The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.

Complete the fault-tracing for those fault or try again.

CHECKING THE POWER SUPPLY AND GROUND FOR THE CONTROL MODULE

Check steering wheel module (SWM) connector A. Check for contact resistance and oxidation.

Check fuse 22 in the passenger compartment fusebox for the steering wheel module (SWM).

Note- If the fuse was blown, check the circuit after the fuse. Check for contact resistance and oxidation.

Check the cable for power supply between fuse 22 in the passenger compartment fusebox and the control module terminals #A1 and #A6. Check for an open-circuit.

Check the ground lead between control module #A22 and ground terminal 31/84. Check for an open-circuit.

Check ground terminal 31/84. Check for contact resistance and oxidation.

Remedy as necessary.

Other information

1. To access the steering wheel module (SWM), see «STEERING WHEEL MODULE (SWM), REPLACING»(ref-476734-S18250606882012060500000)
2. For further information about the fuses and relays, see the appropriate service information.
3. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17655503092012060500000) .

Scheme 12

CHECKING POWER SUPPLY AND GROUND TERMINALS

Check steering wheel module (SWM) connector A. Check for contact resistance and oxidation.

Check fuse 22 in the passenger compartment fusebox for the steering wheel module (SWM).

Note- If the fuse is blown, check the circuit after the fuse. Check for a short-circuit to ground before replacing the fuse. Then replace the fuse. For further information about the circuit after the fuse, refer to the appropriate service information.

Check the cable for power supply between fuse 22 in the passenger compartment fusebox and the control module terminals #A1 and #A6. Check for an open-circuit.

Check the ground lead between control module #A22 and ground terminal 31/84. Check for an open-circuit. Check ground terminal 31/84. Check for contact resistance and oxidation.

Remedy as necessary.

Other information

1. To access or replace the steering wheel module (SWM), see «STEERING WHEEL MODULE (SWM), REPLACING»(ref-476734-S18250606882012060500000)
2. For further information about the fuses and relays, see the appropriate service information.
3. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17655503092012060500000) .

CONNECTING THE BREAKOUT BOX

Special tools

see 9511463

see 9511428

see 9511508

Scheme 13

1. Ignition off
2. Expose the steering wheel module according to «STEERING WHEEL MODULE (SWM), REPLACING»(ref-476734-S18250606882012060500000) .

Check that the male and female terminals on the unit connectors are undamaged and secure (cannot be pressed in). Check that the cables to the female terminals are secured to the terminal pins.

Connect adapter see 9511463 to the control module connector (wiring side). Connect the breakout box

see 9511428 to the adapter. Steering wheel module terminals #A1-#A22 correspond to #1-#22 on the breakout box. If the contact reel is to be checked, connect adapter see 9511508 to breakout box see 9511428 . Contact reel terminals #B1-#B5 correspond to #26-#30 on the breakout box. The breakout box is designed to facilitate reading off the control module input and output signals when the control module is connected; and the cable and component resistance when the control module is disconnected. The use of a breakout box reduces the risk of accidental short-circuited cables and damage to the connector pins.

For further information about signals and other values, see SIGNAL SPECIFICATION .

CHECKING THE POWER SUPPLY/GROUND TERMINAL

Steering wheel angle sensor module (SAS) is located inside, and is supplied with power by, the steering wheel module (SWM).

Power supply, steering wheel module (SWM)

The steering wheel module (SWM) is powered via a power input on the control module.

Power input terminal #A8 (#8) receives 15i-supply via fuse 11C/9:2 in the passenger compartment relay/fusebox, which is in turn supplied with power by fuse F34 in the cargo compartment relay/fusebox.

Checking the power supply

Check the power supply cable from the battery to steering wheel module (SWM) terminal #A8 (#8). Check for an open-circuit. Check for loose connections. Check for contact resistance. Check for oxidation. Check the fuse. The voltage must be approximately battery voltage.

Ground terminal, steering wheel module (SWM)

The steering wheel module (SWM) has a ground input. The ground input from the control module is a power ground and is connected to ground terminal 31/84 in the car body.

Checking the ground terminal

Check the ground lead between steering wheel module (SWM) terminal #2 (#2) and the ground terminal. Check for an open-circuit. Check for loose connections. Check for contact resistance. Check for oxidation. With the ignition on, the drop in voltage between the ground connection for the steering wheel module (SWM) and the ground terminal must not be greater than 0.5 V.

Remedy as necessary.

Other information

1. See the appropriate service information for more about circuit and ground terminals in the bodywork
2. see «CONNECTING THE BREAKOUT BOX»(ref-476731-S18470901272012060500000)
3. see «CONTENTS»(ref-476689-S17283010372012060500000) .

CONNECTING THE BREAKOUT BOX TO THE STEERING ANGLE SENSOR

Special tools

see 9511428

see 9511463

Scheme 14

1. Ignition off
2. Expose the control module for the steering wheel angle sensor. For -2004, see «STEERING WHEEL ANGLE SENSOR MODULE (SAS), REPLACING»(ref-476734-S17937969732012060500000) . For -2005, see «STEERING WHEEL MODULE (SWM), REPLACING»(ref-476734-S18250606882012060500000) .
3. Disconnect the control module for the steering wheel angle sensor by pressing in the lock catch and pull the connector straight outwards
4. Check the control module and control module connectors to ensure that the male and female terminals are undamaged and secure (cannot be pressed in). Check that the cables to the female terminals are secured to the terminal pins
5. In particular, check the terminal pins relevant to the diagnostic trouble code (DTC) / symptom. See «SIGNAL DESCRIPTION, CONTROL UNIT FOR THE STEERING WHEEL ANGLE SENSOR (SAS)»(ref-476731-S36104563352012062700000) .
6. Connect adapter see «9511463»(ref-460875-S37881146052012033000000) to the control module connector (wiring side). Connect breakout box see «9511428»(ref-460875-S19859279082012033000000) to the adapter. Terminals #1 - #16 on the control module for the steering wheel angle sensor correspond to terminals (#A25 - (#A40 on the breakout box
7. The breakout box is designed to facilitate reading off the control module input and output signals when the control module is connected; and cable and component resistance when the control module is disconnected. The use of a breakout box reduces the risk of accidental short-circuits and damage to the connector pins.

Special tools

see 9511508

see 9511428

1. Ignition off
2. Expose the steering wheel module (SWM). See «STEERING WHEEL MODULE (SWM), REPLACING»(ref-476734-S18250606882012060500000) .

Check that the male and female terminals on the unit connectors are undamaged and secure (cannot be pressed in). Check that the cables to the female terminals are secured to the terminal pins.

Connect adapter see 9511508 to the control module connector (wiring side). Connect the breakout box.

see 9511428 to the adapter. Steering wheel module (SWM) terminals #A1-#A10 correspond to terminals #1-#10 on the breakout box. The breakout box is designed to facilitate reading off the control module input and output signals when the steering wheel module (SWM) is connected, and the cable and component resistance when the control module is disconnected. The use of a breakout box reduces the risk of accidental short-circuited cables and damage to the connector pins.

Disconnect the breakout box in reverse order.

Note. Before the control module can be checked and readings taken, the removed fuses must first be installed.

For information about the signals and other values, see SIGNAL SPECIFICATION .

For further information about the fuses and ground point, see the appropriate service information.