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DTC B2500: Reference

When the ignition switch is turned ON, the warning lamp blinks 7 times during 7 seconds.

If the warning lamp stays ON or blinks a second after the above normal blinking, 7 times during 7 seconds, then it is regarded as a defect, old or current. Please inspect the defect with the scan tool.

DTC B2500

Step Action Values Yes No
CAUTION: Refer to Sensing and Diagnostic Module Handling Caution .
CAUTION: Refer to SDM Voltage After Ignition Is Turned OFF Caution .
Schematic Reference:  SIR Schematics (Except North American)  or  SIR Schematics (North American) Connector End View Reference:  SIR Connector End Views 
1 Did you perform a Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2 Inspect fuse F4.
Is the fuse blown?		 - Go to Step 3  Go to Step 4 
3 Replace fuse F4.
Is the repair complete?		 - Go to Step 15  -
4
  1. Confirm the ignition switch is ON.
  2. Measure the voltage from fuse F4.
Is the voltage within the specified range?		 11-14 V Go to Step 6  Go to Step 5 
5 Repair the power supply and the wiring to fuse F4.
Is the repair complete?		 - Go to Step 15  -
6
  1. Confirm the ignition switch is OFF.
  2. Remove the clock.
  3. Inspect the bulb of the air bag warning lamp.
Is the bulb OK?		 - Go to Step 8  Go to Step 7 
7 Replace the bulb of the air bag warning lamp.
Is the repair complete?		 - Go to Step 15  -
8
  1. Confirm the ignition switch is ON.
  2. Measure the voltage from terminal 17 of the clock wiring connector.
Is the voltage within the specified range?		 11-14 V Go to Step 10  Go to Step 9 
9 Repair the wiring between fuse F4 and terminal 17 of the clock wiring connector.
Is the repair complete?		 - Go to Step 15  -
10 Inspect the connection between terminal 17 and 7 of the clock.
Is the connection OK?		 - Go to Step 12  Go to Step 11 
11 Replace the clock.
Is the repair complete?		 - Go to Step 15  -
12
  1. Confirm the ignition switch is OFF.
  2. Remove the connector of the I/P module and the connector of steering wheel module coil.
  3. Remove the connector of the sensing and diagnostic module (SDM).
  4. Confirm the ignition switch is ON.
  5. Carefully lift the shorting bar from terminal 27 of the SDM connector and measure the voltage.
Is the voltage within the specified range?		 11-14 V Go to Step 13  Go to Step 14 
13 Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .
Is the repair complete?		 - Go to Step 15  -
14 Repair the wiring between terminal 27 of the SDM and the clock.
Is the repair complete?		 - Go to Step 15  -
15
  1. Reconnect all SIR components.
  2. Verify that all components, connectors and connector position assurances (CPAs) are properly mounted.
  3. Use the scan tool in order to clear the DTCs.
  4. Operate the vehicle within the Conditions for Running the DTC, as specified in the supporting text.
Does the DTC reset?		 - Go to Step 2  System OK
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