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Home >> Volvo >> 1995 >> 850 GLT, 4D Sedan, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Engine Controls - Tests W/Codes - Non-Turbo (M/T) - MOTRONIC 4.4) >> Circuit Tests >> DTC 534 - Ignition Discharge Module (IDM) Group "D"

DTC 534 - Ignition Discharge Module (IDM) Group "D"

WARNING: This page is about a different car, the 1996 Volvo 850. However, it is still accessible from the selected car via links, so may be relevant.
  1. If fault is intermittent, go to step 7) If fault is permanent, attempt to start engine. If engine starts, go to next step. If engine does not start, go to step 5).
  2. Turn ignition on. Using scan tool, activate engine cooling fan at high speed. If cooling fan comes on, go to next step. If cooling fan does not come on, turn ignition off. Disconnect cooling fan relay "B". Connect test light between cooling fan relay "B" terminal No. 2 and ground. If test light does not come on, replace relay. If light comes on, check wire between relay "B" terminal No. 2 and ECM connector terminal A22 for a short to voltage.
  3. If vehicle is equipped with M/T, go to next step. If vehicle is equipped with A/T, connect breakout box to ECM connector and check ground connections. See SYSTEM/COMPONENT TESTS article. Connect ECM to breakout box. Turn ignition on. Connect test light between breakout box pins B28 and B12. If test light comes on, go to next step. If test light does not come on, check wiring between ECM connector B12 and Transmission Control Module (TCM) connector B12 for a short circuit to voltage.
  4. Connect breakout box to ECM connector and check ground connections. See SYSTEM/COMPONENT TESTS article. Connect ECM to breakout box. Turn ignition on. Connect voltmeter between breakout box pins No. 7 and 28. If voltmeter reads 0-2 volts, go to step 7). If voltmeter does not read 0-2 volts, check wiring between instrument cluster connector terminal B11 and ECM connector terminal B7 for a short circuit to voltage.
  5. Turn ignition on. Using scan tool, activate fuel pump. Fuel pump relay should operate and fuel pump should run. If relay operates, go to next step. If relay does not operate, turn ignition off. Disconnect fuel pump relay. Turn ignition on. Connect test light between fuel pump relay connector terminal No. 4 and ground. If test light does not come on, replace relay. If test light comes on, check wiring between fuel pump relay connector terminal No. 4 and ECM connector terminal B27 for a short circuit to voltage.
  6. Turn ignition off. Disconnect Ignition Discharge Module (IDM) connector. Turn ignition on. Connect test light between IDM connector terminal No. 4 and ground. If test light comes on, replace IDM. If test light does not come on, check wire between IDM connector terminal No. 4 and ECM connector terminal B11 for a short circuit to voltage.
  7. Problem is intermittent. Check wiring between IDM connector terminal No. 4 and ECM connector terminal B11 for an intermittent short circuit to voltage. Check wiring between fuel pump relay terminal No. 4 and ECM connector terminal B27 for an intermittent short circuit to voltage. Check wiring between Malfunction Indicator Light (MIL) connector terminal B11 and instrument cluster connector terminal B7 for an intermittent short circuit to voltage. Check wiring between ECM connector terminal B12 and TCM connector terminal B12 for an intermittent short circuit to voltage. Also check wiring between cooling fan relay connector terminal B2 and ECM connector terminal A22 for an intermittent short circuit to voltage.
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