1200 CERTIFIER SELF-TEST PROCEDURES
Purpose: To check the ‘zero’ air calibration of sensors and to check the tester for internal air
leaks, and to resolve any issues in them, as needed.
NOTE: Do not connect Tester to vehicle during any of these self-tests.
Lite-Check CERTIFIER 1200 Operations Manual
9
You will perform 3 unique tests in sequence to be sure your 1200 Certifier is ready to be used for
testing. The 3
rd
test (Differential test) will only need to be done if you are testing a trailer or dolly
which is designed to tow another vehicle. All 3 tests are listed below.
1. Internal Air Leak Self-Test without a Trailer or Dolly
2. 121 Timing Self-Test without a Trailer or Dolly
3. Differential Self-Test*without a Trailer or Dolly
* The Differential Self-Test will only be done on vehicles designed to tow other vehicles.
All tests will be discussed in detail on the following pages.
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