DTC 27: Driver-Side Seat Belt PRETENSIONER Open Circuit

WARNING: This page is about a different car, the 2003 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Ensure shorting bar in SRS ECU connector is released by using a cable tie or similar non conducting item to release shorting bar before performing electrical measurements.

Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Disable SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM .
Disconnect passenger-side seat belt pretensioner connector D-26. See Figure. Connect Load Resistor (MB991865) to Resistor Harness (MB991884). Connect resistor harness to driver-side seat belt pretensioner connector. Connect negative battery cable. Using scan tool, check for DTC's. If DTC 27 is retrieved, go to next step. If DTC 27 is not retrieved, replace driver-side seat belt pretensioner. See SEAT BELT PRETENSIONER under REMOVAL & INSTALLATION.
Disconnect SRS ECU connector. Measure resistance between SRS ECU connector C-114, terminals No. 29 (Red/White wire) and driver-side seat belt pretensioner connector D-26, terminal No. 1. See WIRING DIAGRAMS . Measure resistance between SRS ECU connector terminal No. 30 (Red wire) and driver-side seat belt pretensioner connector D-26, terminal No. 2. If resistance is 2 ohms or less in both wires, erase, then retrieve DTC's using scan tool. If DTC 27 is retrieved, replace SRS ECU. See SRS ELECTRONIC CONTROL UNIT (SRS ECU) under REMOVAL & INSTALLATION. If resistance is more than 2 ohms in either wire, replace wire harness between SRS ECU and seat belt pretensioner.
Reconnect all SRS components. Activate air bag system. Using scan tool retrieve DTC's. If DTC 27 is retrieved, go to step 1. If DTC 27, is not retrieved, system is normal at this time. Intermittent condition may exist.