DTC B1425

DTC B1425  : CDS (Collision Detection Signal) Input Circuit Malfunction

DTCs (Telematics System)

NOTE: 

• Before doing this troubleshooting procedure, review SRS Precautions and Procedures , General Troubleshooting Information , and 12 Volt Battery Terminal Disconnection and Reconnection .
• Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software , and retest.
• Check the connectors for poor connections or loose terminals.

1. SRS system check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Turn the vehicle to the ON mode, and check that the SRS indicator comes on for about 6 seconds and then goes off.

   Does the SRS indicator come on for about 6 seconds and then goes off?

   YES 

   Go to step 2.

   NO 

   Go to SRS symptom troubleshooting .

2. Problem verification

   -1. Clear the DTCs with the HDS.

   -2. Turn the vehicle to the OFF (LOCK) mode.

   -3. Open the driver's door, and wait more than 1 minute.

   -4. Turn the vehicle to the ON mode.

   -5. Check for DTCs with the HDS.

   DTC Description	DTC
   B1425 CDS (Collision detection signal) input circuit malfunction

   Is DTC B1425 indicated?

   YES 

   The failure is duplicated, go to step 3.

   NO 

   Intermittent failure, the system is OK at this time.

3. Determine possible failure area (CDS line, others)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Open the driver's door, and wait more than 1 minute.

   -3. Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.

   -4. Disconnect the following connectors.

   SRS unit connector A (39P)

   Power tailgate control unit connector A (24P)

   -5. Reconnect the negative cable to the 12 volt battery.

   -6. Turn the vehicle to the ON mode.

   -7. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	SRS unit connector A (39P): disconnected
   	Power tailgate control unit connector A (24P): disconnected
   Test point 1	SRS unit connector A (39P) No. 1
   Test point 2	Body ground

   Is there about 5.0 V?

   YES 

   Replace the SRS unit .

   NO 

   Go to step 4.

4. Open wire check (CDS line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	SRS unit connector A (39P): disconnected
   	Power tailgate control unit connector A (24P): disconnected
   Test point 1	Telematics control unit connector A (32P) No. 29

   Test point 2

   Body ground

   Is there about 5.0 V?

   YES 

   Repair an open in the wire.

   NO 

   The CDS wire is not open. Go to step 5.

5. Shorted wire check (CDS line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Open the driver's door, and wait more than 1 minute.

   -3. Disconnect the following connector.

   Telematics control unit connector A (32P)

   -4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	SRS unit connector A (39P): disconnected
   	Power tailgate control unit connector A (24P): disconnected
   	Telematics control unit connector A (32P): disconnected
   Test point 1	Telematics control unit connector A (32P) No. 29
   Test point 2	Body ground

   Is there continuity?

   YES 

   Repair a short to body ground in the wire.

   NO 

   Replace the telematics control unit .