SECURITY LIGHT: 13, WDS OR EQUIVALENT: B1600

id0902a5003100

Detection Condition

• The key ID number data cannot be read.

Possible Cause

• No transponder in the key

• Transponder malfunction (Key ID number is not output.)

• Coil malfunction

• PCM malfunction

• Communication error

- If any of the following items are touching or near the key head, the ignition key cannot communicate with the vehicle properly and the engine cannot be started.
• Any metallic object
• Spare keys or ones for other vehicles equipped with an immobilizer system
• Any electronic device, or credit or other cards with magnetic strips

Diagnostic Procedure

STEP

INSPECTION

ACTION

1
VERIFY DTC USING WDS OR EQUIVALENT
• Is DTC B1600 displayed?
Yes
Go to Step 3.
No
Go to the next step.
2
VERIFY DTC USING WDS OR EQUIVALENT
• Is DTC B2431 displayed?
Yes
Perform "SECURITY LIGHT: 13, WDS OR EQUIVALENT: B2431."
No
Go to the next step.
3
VERIFY WHETHER KEY IS VALID OR NOT
• Are there any keys with which the engine can be started, other than the key that is the cause of the displayed DTC?
Yes
Go to Step 5.
No
Go to the next step.
4
VERIFY WHETHER MALFUNCTION IS IN KEY OR COIL ANTENNA
• Using the WDS or equivalent, program an additional key.
• Using the programmed key, turn the ignition switch to the ON position.
• VERIFY DTC USING WDS OR EQUIVALENT
- Is DTC B1600 displayed again?
Yes
Replace the coil antenna, then go to Step 6.
No
• Dispose of the malfunctioning key.
• Program a new key if necessary.
5
VERIFY WHETHER MALFUNCTION IS IN KEY OR COIL ANTENNA
• Using another valid key, turn the ignition switch to the ON position.
• Verify the DTC using the WDS or equivalent.
- Is DTC B1600 displayed again?
Yes
Replace the coil antenna, then go to the next step.
No
• Dispose of the malfunctioning key.
• Program a new key if necessary.
6
Inspect the PCM.
• Using the programmed key, turn the ignition switch to the ON position.
• Verify the DTC using the WDS or equivalent.
- Is B1600 displayed again?
Yes
Replace the PCM and perform the resetting procedure for the immobilizer system when replacing the PCM.
No
DTC inspection completed.