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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 42 (Seat Heating System And Seat Cooling System) >> Diagnostic Information and Procedures >> DTC B2345 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

B2345 00

  1. Ignition OFF, disconnect the (C1) harness connector at the rear heated seat module.
  2. Test for infinite resistance between the left seat heating element supply voltage circuit terminal 3 and ground.
    • If less than infinite, test the supply voltage circuit and the seat cushion and seat back heating element control circuits for a short to ground.
  3. Ignition ON, verify that a test lamp does not illuminate between the supply voltage circuit terminal 3 and ground.
    • If the test lamp illuminates, test the supply voltage circuit and the seat cushion and seat back heating element control circuits for a short to voltage.
  4. Test for infinite resistance between the right seat heating element supply voltage circuit terminal 6 and ground.
    • If less than infinite, test the supply voltage circuit and the seat cushion and seat back heating element control circuits for a short to ground.
  5. Ignition ON, verify that a test lamp does not illuminate between the supply voltage circuit terminal 6 and ground.
    • If the test lamp illuminates, test the supply voltage circuit and the seat cushion and seat back heating element control circuits for a short to voltage.
  6. If all circuits test normal, replace the rear heated seat module.

B2345 13

  1. Ignition OFF, disconnect the (C2, C4) harness connectors at the rear heated seat module.
  2. Test for greater than 2.0K ohms of resistance between the following temperature sensor signal circuits and the low reference circuits:
    • Left rear seat cushion terminal 6 (C2) and terminal 9 (C4)
    • Left rear seat back terminal 5 (C2) and terminal 19 (C4)
    • Right rear seat cushion terminal 8 (C2) and terminal 20 (C4)
    • Right rear seat back terminal 7 (C2) and terminal 10 (C4)
    • If less than 2.0K ohms, test for a short between the signal and low reference circuits. If the circuits test normal, replace the appropriate temperature sensor.
  3. If all circuits test normal, replace the rear heated seat module.

B2345 42 or B2345 4B 

If either DTC is set, the only option is module replacement.

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