NOTE IF UNSURE ON HOW TO READ THE DMM CONSULT THE DMM OPERATING MANUAL. When the vehicle is awake (not in sleep mode) the typical KOL for a normal functioning vehicle is 860 mA +/- 100 mA (read on a meter as 0.86 A or 860 mA). A KOL measurement of greater than 28 mA is considered a KOL fault/issue. All KOL measurements are taken while the vehicle is in sleep mode. A vehicle will be in sleep mode after 30 minutes of no electrical system activity. The maximum average KOL current for a normal functioning vehicle in sleep mode will be no greater than 28 mA (read on the DMM as 0.028 A or 28 mA). If you set the DMM for average, you will get a more stable reading of about 0.019 A to 0.020 A. The 0.048 A reading is due to the BSM (or VSM) momentarily waking up to pole the remote keyless entry (RKE) or TPMS. For example, a normal reading could be 0.019 A (19 mA) with a momentary periodic jump in the reading to 0.048 A. If the meter has "average" reading capability, use it to read the average value. That is normal and is the body security module (BSM) or vehicle security module (VSM) polling transmitters and possibly the tire pressure monitoring system (TPMS) transmitters. You may notice the meter reading periodically jumping up in value. Then disconnect the jumper wire and read the meter. Wait 30 minutes (so that the vehicle goes to sleep). With the jumper wire connected as shown in Figure 1, the meter will show an erroneous reading - ignore it. Set the DMM mode dial to mA or A (depending on the meter used). Attach the battery negative post to GROUND (GND) or COMMON input of the DMM (Figure 1). Use the input that is fused for at least 1 amp of current typically this is the "A" input. There are typically two AMP inputs on the meter and they are labeled "A" and "mA" (or mA uA). Attach the negative battery terminal to the DMM AMP INPUT. Attach a digital multi meter (DMM) as shown. Attach a jumper wire between the negative battery post and negative battery terminal such that it can be easily attached and unattached like alligator clip ends. I have also attached a few other TSB on the other systems for your review.ĭisconnect the negative battery terminal (Figure 1). However, it is still important to have the other checks performed. That would really help out also.Īlso, with today's computers in cars, jump starting must be accomplished correctly to prevent damage to electrical components.įor the battery being dead, there was a technical service bulletin out on this. While there, have them check the vehicle for any codes. But if the alternator is not putting out right, you will still have electrical problems. Weak electrical input will cause all types of problems. But we need to make sure your alternator is properly charging the battery. Your battery was dead which could mean a couple of things. It would really help if you took the car to Auto Zone or O'Reilly's and have them bring the tester out and have them check the battery, starter and alternator. Even the steering wheel has a speed control switch. Review of the fuses for each indicate they are different fuses and relays. There are several things that can cause what you seem to be describing.
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