Climate Units - General Diagnostics and Tests: Other Volvo XC90 I

CHECKING THE POWER SUPPLY AND GROUND FOR THE CONTROL MODULE

Check climate control module (CCM) terminal #A1 and relay 2/29 (passenger compartment relay box) connectors. Check for contact resistance and oxidation.

Check fuses 23 and 24 in the passenger compartment fusebox for the climate control module (CCM). Check for contact resistance and oxidation.

Check the power supply cable between fuse 23 and the control module terminal #A8. Check for an open-circuit.

Check the function of relay 2/29 by replacing it with a new relay.

Check the cable for power supply (extended X supply) between fuse 24 and relay 2/29 terminal #3. Check for an intermittent open-circuit.

Check the cable for power supply (extended X supply) between relay 2/29 terminal #1 and climate control module (CCM) terminal #A1. Check for an intermittent open-circuit.

Check power supply cable between fuse 23 and the climate control module (CCM) terminal #A8. Check for an intermittent open-circuit.

Check the ground lead between control module terminal #A16 and ground terminal 31/84. Check for an intermittent open-circuit. Check ground terminal 31/84. Check for contact resistance and oxidation.

Remedy as necessary.

Other information

1. To access or replace the control module, see «CLIMATE CONTROL MODULE (CCM), REPLACING»(ref-476744-S19736590922012060500000)
2. To connect the breakout box, see «CONNECTING THE BREAKOUT BOX»(ref-476742-S20459076982012060500000)
3. For other values, see «SIGNAL DESCRIPTION, CLIMATE CONTROL MODULE (CCM), CONNECTOR A»(ref-494792-S20567445892012081600000)
4. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17655503092012060500000)

Scheme 71

Scheme 72

Scheme 73

Check climate control module terminal #A1 and relay 2/29 (passenger compartment relay box) connectors. Check for contact resistance and oxidation.

Check fuse 23 and 24 in the passenger compartment fusebox for the climate control module.

Note. If the fuse is blown, check the circuit after the fuse for a short-circuit to ground before replacing the fuse. Then replace the fuse.

Check the cable for power supply between fuse 23 in the passenger compartment fusebox and control module terminal #A8. Check for an open-circuit.

Check the function of relay 2/29 by replacing it with a new relay.

Check the cable for power supply (delayed X supply) between fuse 24 and relay 2/29 terminal #3. Check for an open-circuit. The voltage at the relay terminal must be battery voltage, measured to ground.

Check the cable for power supply (delayed X supply) between relay 2/29 terminal #1 and climate control module (CCM) terminal #A1. Check for an open-circuit. The voltage at the terminal must be battery voltage, measured to ground.

Check power supply cable between fuse 23 and the climate control module (CCM) terminal #A8. Check for an open-circuit.

Check the ground lead between climate control module (CCM) terminal # A16 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 control module, see «CLIMATE CONTROL MODULE (CCM), REPLACING»(ref-476744-S19736590922012060500000)
2. To connect the breakout box, see «CONNECTING THE BREAKOUT BOX»(ref-476742-S20459076982012060500000)
3. For other values, see «SIGNAL DESCRIPTION, CLIMATE CONTROL MODULE (CCM), CONNECTOR A»(ref-494792-S20567445892012081600000)
4. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17655503092012060500000) .

CHECKING THE POWER SUPPLY AND GROUND TERMINALS

Power supply, climate control module (CCM)

The climate control module (CCM) is powered via a power input on the control module.

Power input terminal #1 (#25) is +15-supplied via a relay and fuse from the central electronic module (CEM). In the event of an open-circuit, climate control functions cannot be activated.

Checking the power supply

Check the power supply cable from the central electronic module (CEM) to climate control module (CCM) terminal #1 (#25). 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, climate control module (CCM)

The climate control module (CCM) has a ground input. The ground input from the control module is power ground and is connected to the ground terminal in the car body.

Checking the ground terminal

Check the ground lead between climate control module (CCM) terminal #16 (#40) 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 and the ground terminal for the climate control module (CCM) must not be greater than 0.5 V.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-476742-S01516235182012060500000)
2. see «SIGNAL SPECIFICATION»(ref-476743-S31850060642012060500000)
3. see «CONTENTS»(ref-476689-S17283010372012060500000)

CONNECTING THE BREAKOUT BOX

Special tools

see 9511463

see 9511428

see 9511428

1. Ignition off
2. To expose the climate control module (CCM) connector, see «CLIMATE CONTROL MODULE (CCM), REPLACING»(ref-476744-S19736590922012060500000)
3. To expose the evaporator temperature sensor connector, see «TEMPERATURE SENSOR EVAPORATOR, REPLACING»(ref-476744-S36864323472012060500000)
4. To expose the sun sensor connector, see «SUN SENSOR / ALARM LED, REPLACING»(ref-476806-S20180009862012060500000) .

Connect breakout box see 9511428 to the adapter.

Climate control module (CCM)

1. Connect adapter see «9511463»(ref-460875-S37881146052012033000000) to control module connectors A and B
2. For connector A, terminals #A1-#A16 correspond to terminals #25-#40 on the breakout box
3. For connector B, terminals #B1-#B22 correspond to terminals #1-#22 on the breakout box.

Evaporator temperature sensor

1. Connect adapter see «9511463»(ref-460875-S37881146052012033000000) to the evaporator temperature sensor connector
2. Terminals #1-#5 on the connector correspond to terminals #26-#30 on the breakout box.

Sun sensor

1. Connect adapter see «9511463»(ref-460875-S37881146052012033000000) to the sun sensor connector
2. Terminals #1-#5 on the connector correspond to terminals #26-#30 on the breakout box.

Special tools

see 9511463

see 9511428

see 9511508

1. Ignition off
2. To expose the climate control module (CCM) connector, see «CLIMATE CONTROL MODULE (CCM), REPLACING»(ref-476744-S19736590922012060500000)
3. To expose the evaporator temperature sensor connector, see «TEMPERATURE SENSOR EVAPORATOR, REPLACING»(ref-476744-S36864323472012060500000) .

Connect breakout box see 9511428 to the adapter.

Climate control module (CCM)

1. Connect adapter see «9511463»(ref-460875-S37881146052012033000000) to control module connectors A and B
2. For connector A, terminals #A1-#A16 correspond to terminals #25-#40 on the breakout box
3. For connector B, terminals #B1-#B22 correspond to terminals #1-#22 on the breakout box.

Evaporator temperature sensor

1. Connect adapter see «9511508»(ref-460875-S27595135172012033000000) to the evaporator temperature sensor connector
2. Terminals #1-#5 on the connector correspond to terminals #26-#30 on the breakout box.