DTC 64

DTC 64 - Front Passenger's Side Air Bag Module (Squib) System

DTC 24, 25, 64, 65 - Front Passenger's Side Air Bag Module (squib) System:

Connector - C-44, C-09:

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.

The ignition signal is input to the air bag module to inflate the air bag.




DTC SET CONDITIONS
These diagnostic trouble codes are output if there is abnormal resistance between the input terminals of the front passenger's side air bag module (squib). The most likely causes for this code to be set are shown in the table.

However, regarding code numbers 24 and 25, once trouble is resolved, the SRS warning lamp will go out. (Diagnostic trouble code will be retained)

TROUBLESHOOTING HINTS
- Damaged wiring harnesses or connectors
- Malfunction of the front passenger's side air bag module (squib)
- Malfunction of the SRS-ECU

DIAGNOSIS
Required Special Tools:
MB991502: Scan Tool (MUT-II)
MB991613: SRS Check Harness




STEP 1. Check the front passenger's side air bag module line at scan tool MB991613
1. Disconnect front passenger's side air bag module connector C-09.
2. Connect special tool MB991613 connector (1).
3. Connect the negative battery terminal.
4. Erase the diagnostic trouble code memory.

If yes, go to Step 2.
If no output, replace the front passenger's side air bag module. Then go to Step 3.







STEP 2. Check the harness wires between SRS-ECU connector C-44 and front passenger's side air bag module connector C-09
If harness wires are in good condition, go to Step 3. If any harness wires between SRS-ECU connector C-44 and front passenger's side air bag module connector C-09 are damaged, repair them. Then go to Step 3.

STEP 3. Check the diagnostic trouble codes
Confirm that the diagnostic trouble code is not output.