B2562

What it means

B2562 is a body code. The control unit has detected that the Auxiliary A/C Blower Speed 1 circuit is shorted to ground. The make is listed as 'Other', so the exact wording and the circuit it monitors can vary between manufacturers. It usually sets when the monitored voltage on the speed 1 control or feed line is pulled low when it should be higher.

Symptoms

• Auxiliary (rear) blower not working on speed 1
• Rear blower stuck on one speed or not responding to the controls
• Rear heating or air conditioning output weak or absent
• Blower speed control behaving erratically
• Blown fuse for the auxiliary blower circuit
• Warning lamp or fault stored in the climate or body control module

Possible causes

• Wiring in the speed 1 circuit chafed or pinched against the body, shorting it to groundlikely
• Damaged or water-contaminated connector at the auxiliary blower, resistor or control modulelikely
• Faulty auxiliary blower motor or blower resistor/speed control module with an internal short to groundpossible
• Faulty rear climate control switch or panel with an internal shortpossible
• Fault within the climate or body control module driving the circuitrare
• Previous repair or accessory fitting that has damaged or incorrectly connected the wiringrare

How to diagnose

1. Read all stored codes and freeze frame data, note whether the fault is current or historic, and check for related climate or blower codes
2. Check the fuse for the auxiliary blower circuit and note whether it has blown
3. Visually inspect the wiring and connectors along the auxiliary blower circuit, especially at the blower, resistor, floor and pillar grommets, for chafing, corrosion or moisture
4. Operate the rear blower on every speed and see whether the fault appears only on speed 1
5. Using the manufacturer wiring diagram, disconnect the blower or resistor and check the speed 1 wire for continuity to ground with the circuit isolated
6. Check the blower motor current draw and resistor or speed control module against specification, as the procedure depends on the model
7. Test the rear control switch or panel, and check its supply and ground
8. Clear the code and retest to confirm that it does not return

How to fix

• Repair or replace the chafed wiring, and secure and protect it away from sharp edges
• Clean, dry or replace corroded or damaged connectors and terminals
• Replace the faulty auxiliary blower motor, resistor or speed control module
• Replace the faulty rear climate control switch or panel
• Replace or repair the control module only after the wiring and components have been proved good, following the manufacturer's procedure
• Replace the blown fuse only once the short to ground has been found and fixed

Can I keep driving?

Nearby codes

• B2561OtherAux A/C Blower Speed 1 Circuit Failure
• B2563OtherAux A/C Blower Speed 2 Circuit Failure