When the creatinine level is lower in the urine test, it indicates people may have kidney problem. As the creatinine is mostly excreted by kidney function, and the damaged kidney function cannot excrete the creatinine out, which will cause the high creatinine level in blood and low creatinine level in urine.
Then, you will not damage anything if timing belt breaks. You simply need to pay for a new one to be put on. Also, the timing belt should last 105,000 miles.       Other symptoms may include engine vibration sometimes bad enough to set a knock sensor code.
Timing Belt and Timing Chain - which tells you if your 1990-current US Toyota has a timing belt or timing chain. Prior to 2001, the RAV4 had a timing belt. 2001 and since, the RAV4 has a timing chain. There are no prescribed maintenance intervals for the timing chain, just replace as needed.