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Toyota Camry 2002-2006: What's Wrong with the Master Switch?

Are you having problems getting your power windows to work consistently? It might be the master switch. Continue reading for more information.

By Jon LeSage - August 11, 2015

This article applies to the 5th generation Toyota Camry (2002-2006).

If you are having problems with your power windows, you might find that the problem is coming from the master switch, which may have to be fixed or completely replaced. Here are three points to consider to resolve the problem.

Step 1 – Check if the master switch needs to be replaced

A 2002 to 2006 Camry will likely be out of warranty coverage on the master switch, so you may need to work with a local mechanic. A new master switch could cost about $400 with around $100 needed for labor cost. The mechanic might offer an alternative method like disconnecting the wiring from the master switch, but that may not solve the problem. Your Camry needs to have the master switch replaced; although, there have been some cases in which some owners still had the problem even after the new new switch was installed.

Figure 1. You may need to have the master switch replaced, which could cost about $500.

If you still have problems after installing a new master switch, continue to Step 2.

Step 2 – Check the relays and fuses

If it isn’t the master switch, it could be coming from relays and master fuses. You might have work done on the car, but find that problem reoccurs when the engine is turned off and then started up again. The relays may be sticking–the EG1 and PWR relays–and might need to be replaced.

Another scenario that could come up is having the power windows working one day, but the next day the windows might not roll up again. That might mean the fuses need to be replaced, which are the ECU-IG and Power Fuse No 1.

Figure 2. The Camry’s power window fuses might need to be replaced.

If the relays and fuses aren't not causing the issue, continue to Step 3.

Step 3 – You may need to visit a dealer or shop

This Camry model has a more complex electrical system compared to previous Camry models. The problem might be coming from somewhere else, such as the ignition switch or ABS controller. You may need to take your car to a trusted local dealer or repair shop for testing.

It might be a good idea to find out how the shop is testing the electrical system. It could just be a temporary fix that doesn’t really diagnose the problems, such as disconnecting the battery or removing the relays.

Figure 3. The problem might be coming from the ignition switch, which a dealer or repair shop can diagnose.

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