Code No.B1137 P range detect SW



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

DIAGNOSTIC FUNCTION


If an error is detected in the P range detection switch circuit system when the vehicle speed is 10 km/h or more, OSS-ECU sets the diagnosis code No.B1137, and displays the immobiliser certification system inspection warning screen to the multi information display of the combination meter.

JUDGEMENT CRITERIA


Check Conditions
Judgment Criterion

PROBABLE CAUSES




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 ).