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Home >> Volvo >> 1995 >> 850 GLT, 4D Sedan, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Engine Controls - Tests W/Codes - Turbo - MOTRONIC 4.3) >> Circuit Tests >> DTC 1-1-5, 1-2-5, 1-3-5, 1-4-5 & 1-5-5 - Fuel Injector Problem

DTC 1-1-5, 1-2-5, 1-3-5, 1-4-5 & 1-5-5 - Fuel Injector Problem

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 an injector circuit is shorted to ground or voltage, or if there is a break in the circuit, ECM interprets this as a fault and sets DTC for appropriate injector. If injector signal is too high, check for signal wire shorted to voltage or defective injector. If injector signal is too low, check for signal wire shorted to ground, open circuit in signal or voltage wire, high connector resistance, or defective injector. If fault is permanent, go to next step. If fault is intermittent, go to step 7).
  2. To check for an injector signal that is too high, turn ignition off. Disconnect injector connector. Connect ohmmeter between injector connectors No. 1 and 2. If ohmmeter does not indicate about 14.5 ohms, install new injector. If ohmmeter indicates about 14.5 ohms, check wiring between injector connector terminal No. 2 and ECM connector terminal A10 (1-1-5), A38 (1-2-5), A24 (1-3-5), A23 (1-4-5), or A9 (1-5-5) for a short to voltage.
  3. To check for an injector signal that is too low, turn ignition off, disconnect injector, and turn ignition on. Connect voltmeter between injector connector terminal No. 1 and ground. If battery voltage is present, go to next step. If battery voltage is not present, check wiring between injector connector terminal No. 1 and main relay connector for an open circuit.
  4. Ensure ignition is off. Wait about 90 seconds, then disconnect injector connector. Connect ohmmeter between injector connector terminal No. 2 and ground. If ohmmeter indicates 2500-4000 ohms, go to next step. If ohmmeter indicates infinite resistance, go to step 6). If ohmmeter indicates about zero ohms, check wiring between injector connector terminal No. 2 and ECM terminal A10 (1-1-5), A38 (1-2-5), A24 (1-3-5), A23 (1-4-5), or A9 (1-5-5) for a short to ground.
  5. Ensure ignition is off. Disconnect injector connectors. Connect ohmmeter between injector connector terminals No. 1 and 2. If resistance is 14.5 ohms, check for poor contact between injector and/or ECM connector. If resistance is not 14.5 ohms, replace injector.
  6. Ensure ignition is off. Disconnect injector connectors. Check connectors for poor contact or oxidation, and repair as necessary. If connector contact is okay, connect an ohmmeter between injector connector terminal No. 2 and ground. If ohmmeter indicates 2500-4000 ohms, check ECM connector for poor contact. If ohmmeter does not indicate 2500-4000 ohms, check wiring between injector connector terminal No. 2 and ECM terminal A10 (1-1-5), A38 (1-2-5), A24(1-3-5), A23 (1-4-5), or A9 (1-5-5) for an open circuit.
  7. If fault is intermittent and signal is too high, check wiring between injector connector terminal No. 2 and ECM connector terminal A10(1-1-5), A38 (1-2-5), A24 (1-3-5), A23 (1-4-5), or A9 (1-5-5) for an intermittent short to voltage.
  8. If fault is intermittent and signal is too low, check injector and ECM connectors for poor contact or oxidation, and repair as necessary. Also check wiring between injector connector No. 1 and main relay connector for an intermittent open circuit. Check wiring between injector connector No. 2 and ECM terminal A10 (1-1-5), A38 (1-2-5), A24(1-3-5), A23 (1-4-5), and A9 (1-5-5) for an intermittent short to ground.
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