Standard Testing

DTC B1407 PPD Communication Error

Circuit Description

Wiring Diagram:

The release system for the airbag consists of the SRSCM, an interface unit and PPD. The above DTC's are recorded when the defect or communication error of PPD is detected in the PPD circuit.


INSPECTION PROCEDURE

1. Preparation.
1. Disconnect negative (-) terminal cable from the battery, and wait at least 30 seconds.
2. Disconnect the connector of PPD.
3. Disconnect connector of SRSCM.




2. Check PPD circuit (Communication error).

CHECK: Check continuity between SRSCM connector and PPD interface unit as high (+) and high, low (-) and low (-).

OK : Continuity

NG: Replace harness between SRSCM and ppD I/F unit.

OK: Go to step "3".

3. Check PPD interface unit.

CHECK: Check continuity of PPD interface unit and PPD as high (+) and high (+), low (-) and low (-).

NG: Replace harness between PPD and PPD I/F unit.

OK: Go to step "4".




4. Check PPD sensor (Defect).

CHECK: Check the resistance in accordance with the changed weight.

R <= 50 k Ohm for W => 15 kg
R > 50 k Ohm for W <= 0.6 kg

NG: Replace PPD sensor

OK: Go to step "5".

5. Check PPD squib.

PREPARATION
1. Turn ignition switch to LOCK.
2. Disconnect negative (-) terminal cable from the battery and wait at least 30 seconds.
3. Connect the SRSCM connector and the PPD connector.




4. Connect negative (-) terminal cable to battery and wait at least 30 seconds.

CHECK:
1. Turn ignition switch to ON, and wait at least 30 seconds.
2. Clear malfunction code stored in memory with Mi-scan.
3. Turn ignition switch to LOCK, and wait at least 30 seconds.
4. Turn ignition switch to ON, and wait at least 30 seconds.
5. Using Hi-scan, check DTC.

DTC is not output.

HINT: Codes other than these ones may be output at this time, but they are not relevant to this check.

NG: Replace SRSCM.

OK: From the results of the above inspection, the malfunctioning part can now be considered normal.