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DTC B1137 P range detect SW
 
 
cautionWhen 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 DTC B1137, and displays the immobilizer certification system inspection warning the combination meter.
 
 
JUDGMENT 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 ECM
  • Malfunction of the TCM
  • Malfunction of KOS&OSS-ECU
 
 
DIAGNOSIS
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 itemTerminal No.Normal value
Selector lever: P position3 - 6No continuity
Selector lever: Other than P positionContinuity exists (2 Ω or less)
Check itemTerminal No.Normal value
Selector lever: P position3 - 6No continuity
Selector lever: Other than P positionContinuity exists (2 Ω or less)
Is the check result normal?
Go to Step 2.
Replace the selector lever assembly.
 
STEP 2. Using scan tool (M.U.T.-IIISE), check the other system DTC.
Check the DTC of ECM or TCM.
Is the DTC set?
: Troubleshoot the ECM (Refer to GROUP 13A - Diagnosis ).
: Troubleshoot the TCM (Refer to GROUP 23A - Diagnosis ).
: 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.
noteBecause 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 volts with intervals of 10 ms.).
Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness.
 
STEP 4. Using scan tool (M.U.T.-IIISE), check the other system data list
Check the KOS&OSS-ECU data list.
  • Operate the selector lever.
 
Item No.Check itemOperation stateDisplay
7P position detect switchSelector lever: P positionP
Selector lever: Other than P positionExcept P
Item No.Check itemOperation stateDisplay
7P position detect switchSelector lever: P positionP
Selector lever: Other than P positionExcept P
OK: Operation state and data list display agree with each other.
Is the check result normal?
Go to Step 5.
Replace the KOS&OSS-ECU and register the ID codes (Refer to ).
 
STEP 5. Check whether the DTC is set again.
Is the DTC set?
Replace the KOS&OSS-ECU and register the ID codes (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).