DTC 137: Pressure Sensor Offset Malfunction

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch to ON (II).
Disconnect the brake pedal position switch 4P connector (see step 2 under BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT ).
Do the brake pedal position switch test (see HIGH MOUNT BRAKE LIGHT REPLACEMENT ).
Is the switch OK?

YES -Go to step 4.

NO -Replace the brake pedal position switch (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT ).
Short the SCS line with the HDS.
Disconnect the PCM connector A (49P).
Turn the ignition switch to ON (II).
Measure the voltage between PCM connector A (49P) terminal No. 8 and body ground.

Fig 1: Measuring Voltage Between PCM Connector A (49P) Terminal No. 8 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 0.1 V or more when the brake pedal is released?

YES -Repair a short to power in the wire between the brake pedal position switch and the PCM.

NO -Go to step 8.
Turn the ignition switch to LOCK (0).
Reconnect all connectors.
Update the PCM if it does not have the latest software (see KNOCK SENSOR REPLACEMENT ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ).
Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Test-drive the vehicle at 8 mph (12 km/h) for 60 seconds or more.
NOTE: Drive the vehicle on the road, not on a lift.
Check for DTCs with the HDS.
Is DTC 137 indicated?

YES -Check for loose terminals in the PCM connector A (49P). If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then retest. If the PCM was substituted, go to step 15.

NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see PCM REPLACEMENT ).
Update the VSA modulator-control unit if it does not have the latest software (see VSA MODULATOR-CONTROL UNIT UPDATE ).
Test-drive the vehicle. Drive the vehicle at 8 mph (12 km/h) for 60 seconds or more, around a number of corners.
NOTE: Drive the vehicle on the road, not on a lift.
Check for DTCs with the HDS.
Is DTC 137 indicated?

YES -Check for loose terminals in the VSA modulator-control unit 46P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).

NO -If the VSA modulator-control unit was updated, troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCS TROUBLESHOOTING .