Code No.B1137 P range detect SW


caution When replacing the ECU, always check that the communication circuit is normal.

DIAGNOSTIC FUNCTION



JUDGEMENT CRITERIA


Check Conditions
  • Power supply mode: ON
Judgment Criterion
  • When the vehicle speed is 10 km/h or more, 1 second or more has elapsed since the P range detection switch is detected to be OFF (selector lever is in P position).
  • When the P range detection switch is OFF, the signal other than selector lever P position is received for 2 seconds or more.

PROBABLE CAUSES



  • Damaged wiring harness or connector (short to power supply or open circuit in PDSW line)
  • Selector lever assembly malfunction (OFF seizure of P range detection switch)
  • Malfunction of the ABS-ECU or the ASC-ECU
  • Malfunction of the CVT-ECU
  • Malfunction of OSS-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III other system diagnosis code
Check the diagnosis code of ABS-ECU or ASC-ECU and CVT-ECU.

Q. Is the diagnosis code set?
YES <Set in ABS-ECU or ASC-ECU> : Troubleshoot the ABS-ECU or ASC-ECU. (Refer to GROUP 35B - Troubleshooting <ABS> or GROUP 35C - Troubleshooting <ASC>.)
YES <Set in CVT-ECU> : Troubleshoot the CVT-ECU. (Refer to GROUP 23A - Troubleshooting .)
NO : Go to Step 2

STEP 2. Check of short to power supply, short to earth and open circuit in PDSW line between selector lever assembly connector and OSS-ECU connector
note Because the conformity cannot be determined even when the digital tester is used to measure the voltage of PDSW line between the selector lever assembly connector and OSS-ECU connector, be sure to use the oscilloscope. (Outputs the saw tooth waveform of 0 to 5 V with intervals of 10 ms.)

Q. Is the check result normal?
Go to Step 3
Repair the connector(s) or wiring harness.

STEP 3. Check of selector lever assembly (P range detection switch)
Disconnect the selector lever assembly connector, and check the continuity at the equipment side.
Item No.
 Check item
 Normal value
4 - 6
 Selector lever: P position
 No continuity
Selector lever: Other than P position
 Continuity exists (2 Ω or less)

Q. Is the check result normal?
Go to Step 4
Replace the selector lever assembly.

STEP 4. M.U.T.-III other system data list
Check the OSS-ECU data list.

  • Operate the selector lever.
Operation state
 Item No.
 Check item
 Display
Selector lever: P position
 8
 P range detect SW
 Park position
Selector lever: Other than P position
 Other than Park position
OK: Operation state and data list display agree with each other.

Q. Is the check result normal?
Go to Step 5
Replace the OSS-ECU and register the chassis number (Refer to ).

STEP 5. Check whether the diagnosis code is reset.

Q. Is the diagnosis code set?
Replace the OSS-ECU and register the chassis number (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).