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Resistance Tests

  1. Disconnect temperature gauge sending unit connector. Connect Red lead of Checker (49 0839 285) to connector terminal and checker Black lead to body ground. See Fig 1 .
  2. Set checker to test resistance. See Fig 1 . See TEMPERATURE GAUGE RESISTANCE table. If number of segments lit does not agree with table, replace gauge.
Fig 1: Testing Temperature Gauge
G33035Courtesy of MAZDA MOTORS CORP.
TEMPERATURE GAUGE RESISTANCE TEST

Set Resistance (Ohms) Number of Segments Lit
More Than 169 1
140-169 2
118-140 3
85-118 4
30-85 5
27-30 6
23-27 7
20-23 8
17-20 9
Less Than 17 ALL