Page 81 - Manual_Polaris_RZR_ProXP-20-21

GENERAL INFORMATION

TESTING CONTINUITY / RESISTANCE TESTING FOR A SHORT TO GROUND
Testing using the Ohmmeter function of your DMM is one Shorts to ground happen when the current flowing in a 1
of the first things you will do when troubleshooting an given circuit bypasses the load. The current flowing from
electrical issue. It is especially convenient when the B+ finds an easier way to return to ground (B-), so much
wiring diagram provides a resistance spec for the more of it can flow than the circuit is designed for. This
component in the circuit you are diagnosing. It can causes the circuit’s protection device (either a fuse or
quickly give you a good idea if you simply need to circuit breaker) to open, protecting the circuit from
replace a part, or if there might be another circuit issue. damage.
Using the following points in conjunction with your DMM There are many possible causes of a short to ground,
owner’s manual will ensure your resistance testing is here are some:
always accurate:
• The harness rubbing against a component that is
• Only measure resistance on an isolated part of the grounded, such as the frame, chassis component, or
circuit. This means if you are testing internal resistance engine.
of a component, it cannot be connected to the
harness. If you are measuring a wire (typically from the • A component’s internal circuitry contacting its case.
ECU to a sensor) both the sensor and ECU would • Wire-to-wire chaffing causing contact with the
need to be unplugged. Most Ohmmeters provides a conductor of a ground side circuit.
precise amount of current to determine resistance. Any
other sources will make your reading inaccurate. • Corrosion/moisture in a component providing a ground
path.
• Ensure you are making good contact by using the
proper terminal adapters. Connector Probing • Moisture in a connector body providing a ground path.
Guidelines page 1.74
• If you are not using a self ranging meter, double check NOTICE
your range setting.
This test is typically done right after checking continuity
• If your continuity is under 1 ohm, leave the harness from sensor to ECU when diagnosing an EFI DTC. It
disconnected and move on to Testing For A Short To can also be used to help diagnose concerns about
Ground page 1.75 and Testing For A Short To Voltage blowing fuses. Ensure you are able to duplicate the
page 1.76. concern before testing so that your results point you in
the right direction.Testing for Intermittent Conditions
For a video demonstration, scan the QR code below, or page 1.77
right click it and select “open in new tab.”
TESTING PROCEDURE
1. Consult the wiring diagram. Determine which circuit
you will be testing.

2. Ensure that any static voltage checks advised in
relation to the DTC or concern you are diagnosing
have been performed and are in spec.
3. Ensure you have checked continuity of the circuit.
Testing Continuity / Resistance page 1.75
4. Ensure that neither end of the circuit is connected.
5. Set your DMM to Ohms.
6. Connect one meter lead securely to the battery
negative post.

7. Connect the other lead to either end of the
disconnected circuit. Ensure you are using the correct
adapter.Connector Probing Guidelines page 1.74
8. If there is continuity, the harness is damaged and
should be repaired or replaced.
9. If the DMM reads OL, there is no short to ground.
Leave the harness disconnected on both sides, and
proceed to check for a short to voltage. Testing For A
Short To Voltage page 1.76

9930583 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual 1.75
© Copyright Polaris Industries Inc.