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, KOS&OSS-ECU sets diagnosis code No.B1137, and displays the immobiliser certification system inspection warning the combination meter.

JUDGEMENT CRITERIA

Check Conditions

Power supply mode: ON

Judgement 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 ASC-ECU
Malfunction of the engine-ECU
Malfunction of the CVT-ECU
Malfunction of KOS&OSS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check of selector lever assembly (P range detection switch)

Disconnect the selector lever assembly connector, and check the continuity at the equipment side.

Check item	Terminal No.	Normal value
Selector lever: P position	4 - 6	No continuity
Selector lever: Other than P position	4 - 6	Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 2.

Replace the selector lever assembly.

STEP 2. M.U.T.-III other system diagnosis code

Check the diagnosis code of engine-ECU, ASC-ECU or CVT-ECU.

Q. Is the diagnosis code set?

YES <Set in engine-ECU> : Troubleshoot the engine-ECU (Refer to GROUP 13A - Troubleshooting).

YES <Set in ASC-ECU> : Troubleshoot the ASC-ECU (Refer to GROUP 35C - Troubleshooting).

YES <Set in CVT-ECU> : Troubleshoot the CVT-ECU (Refer to GROUP 23A - Troubleshooting).

NO

: Go to Step 3.

STEP 3. Check of short to power supply or open circuit in PDSW line between selector lever assembly connector and KOS&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 KOS&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 4.

Repair the connector(s) or wiring harness.

STEP 4. M.U.T.-III other system data list

Check the KOS&OSS-ECU data list.

Operate the selector lever.

Item No.	Check item	Operation state	Display
24	P range detect SW	Selector lever: P position	Park position
24	P range detect SW	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 KOS&OSS-ECU and register the chassis number (Refer to

STEP 5. Check whether the diagnosis code is set again.

Q. Is the diagnosis code set?

Replace the KOS&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).