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Home >> Volvo >> 1998 >> V70 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Tests >> DTC P0201/EFI 115, DTC P0202/EFI 125, DTC P0203/EFI 135, DTC P0204/EFI 145 & DTC P0201/EFI 155 >> Diagnosis

DTC P0201/EFI 115, DTC P0202/EFI 125, DTC P0203/EFI 135, DTC P0204/EFI 145 & DTC P0201/EFI 155: Diagnosis

  1. If an injector circuit is shorted to ground or voltage, or if there is an open 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. If signal is missing, check for open circuit in signal or power lead, resistance in terminals, or defective injector.
  2. Check status message on Volvo Scan Tool (998-8686). If status message is PERMANENT FAULT, SIGNAL TOO HIGH, go to next step. If status message is PERMANENT FAULT, SIGNAL TOO LOW, go to step  4. If status message is PERMANENT FAULT, SIGNAL MISSING, go to step  5. If status message is INTERMITTENT FAULT, SIGNAL TOO HIGH or INTERMITTENT FAULT, SIGNAL TOO LOW, go to step  8. If status message is INTERMITTENT FAULT, SIGNAL MISSING, go to step  9.
  3. Turn ignition off. Disconnect injector connector. Connect DVOM between injector connector terminals No. 1 and 2. If DVOM does not indicate approximately 16 ohms, install new injector. If DVOM indicates approximately 16 ohms, check wiring between injector connector terminal No. 2 and ECM connector terminal A10 (DTC 115), A38 (DTC 125), A24 (DTC 135), A23 (DTC 145), or A9 (DTC 155) for a short to voltage.
  4. To check for a PERMANENT FAULT, SIGNAL TOO LOW, check wiring between injector connector terminal No. 2 and ECM connector terminal A10 (DTC 115), A38 (DTC 125), A24 (DTC 135), A23 (DTC 145), or A9 (DTC 155) for a short to ground.
  5. To check for a PERMANENT FAULT, SIGNAL MISSING, turn ignition off. Disconnect injector. Turn ignition on. Measure voltage 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 terminal No. 3 for an open circuit.
  6. Turn ignition on. Measure voltage between injector connector terminal No. 2 and ground. If voltage is approximately 6 volts, go to next step. If voltage is not approximately 6 volts, turn ignition off. Check ECM connector for good terminal contact. Reconnect ECM. Turn ignition on. Measure voltage between injector connector terminal No. 2 and ground. If voltage is approximately 6 volts, fault was caused by poor ECM connector contact. If voltage is not approximately 6 volts, check wiring between injector connector terminal No. 2 and ECM connector terminal A10 (DTC 115), A38 (DTC 125), A24 (DTC 135), A23 (DTC 145), or A9 (DTC 155) for an open circuit.
  7. Turn ignition off. Disconnect injector connector. Connect DVOM between injector connector terminals No. 1 and 2. If DVOM reads approximately 16 ohms, DTC is caused by poor contact in injector or ECM connector. If DVOM does not read approximately 16 ohms, replace injector.
  8. To check for an INTERMITTENT FAULT, SIGNAL TOO HIGH, check wiring between injector connector terminal No. 2 and ECM connector terminal A10 (DTC 115), A38 (DTC 125), A24 (DTC 135), A23 (DTC 145), or A9 (DTC 155) for an intermittent short to voltage. To check for an INTERMITTENT FAULT, SIGNAL TOO LOW, check wiring between injector connector terminal No. 2 and ECM connector terminal A10 (DTC 115), A38 (DTC 125), A24 (DTC 135), A23 (DTC 145), or A9 (DTC 155) for an intermittent short to ground.
  9. To check for an INTERMITTENT FAULT, SIGNAL MISSING, check injector and/or ECM connector for good terminal contact. Check wiring between injector terminal No. 1 and main relay No. 3 for an intermittent open circuit. Check wiring between injector connector terminal No. 2 and ECM connector terminal A10 (DTC 115), A38 (DTC 125), A24 (DTC 135), A23 (DTC 145), or A9 (DTC 155) for an intermittent open circuit.
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