DTC 93

Left Hand Side-airbag Module (Squib) System Fault 6 for Communication System.

Side Impact Sensor (LH) Circuit:

CIRCUIT OPERATION
- The SRS-ECU judges how severe a collision is by detecting signals from the left and right side impact sensors and the analog G-sensor. If the impact is over a predetermined level, the SRS-ECU outputs an ignition signal. At this time, if the safing G-sensor is on, the SRS air bag will inflate.

DTC SET CONDITIONS
- These DTC are output if communication between the side impact sensor (LH) and the SRS-ECU is not possible or communication is faulty.

TROUBLESHOOTING HINTS
- Damaged wiring harnesses or connectors
- Malfunction of the side impact sensor (LH)
- Malfunction of the SRS-ECU

DIAGNOSIS

Required Special Tool:
- MB991502: Scan Tool (MUT-II)

STEP 1. Check the side impact sensor.
1. Replace the side impact sensor (LH) with the side impact sensor (RH).
2. Connect the negative battery terminal.
3. Erase DTC memory.

Q: Is DTC 79 or 93 erased and DTC 89 or 96 output?

YES: Replace the side impact sensor (LH) with a new one. Then go to Step 3.

NO: Go to step 2.







STEP 2. Check the harness wires between SRS-ECU connector C-74 and side impact sensor (LH) connector D-12.

Q: Are the harness wires between SRS-ECU connector C-74 and side impact sensor (LH) connector D-12 in good condition?

YES: Go to Step 3.

NO: Repair them. Then go to Step 3.

STEP 3. Check for DTC.

Q: Is any of DTC 79 or 93 output?

YES: Replace the SRS-ECU.

NO: This diagnosis is complete. (If no malfunctions are not found in all steps, an intermittent malfunction is suspected. Refer to How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction.)