LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 140 (On-Board Diagnostic - Start Stop Unit) >> DTC P0850-24; Transaxle Range Sensor Circuit Malfunction >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE

Step Inspection Action
1 VERIFY TCM DTCs Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (FW6A-EL)] .)
No Go to the next step.
2 VERIFY PCM DTCs Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)] .)
No Go to the next step.
3 INSPECT TCM CONNECTOR CONDITION Yes Go to the next step.
No Repair or replace the connector, then go to Step 9.
4 INSPECT PCM CONNECTOR CONDITION
  • Disconnect the PCM connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
 Yes Go to the next step.
No Repair or replace the connector, then go to Step 9.
5 INSPECT START STOP UNIT CONNECTOR CONDITION
  • Disconnect the start stop unit connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
 Yes Go to the next step.
No Repair or replace the connector, then go to Step 9.
6 INSPECT FOR SHORT TO POWER SUPPLY IN TRANSAXLE RANGE SENSOR CIRCUIT Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
  • TCM terminal J-PCM terminal 2BD
    • TCM terminal J-Start stop unit terminal 1F

If there is a common connector:
  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has a short to power supply.

Go to Step 9.
7 PERFORM DTC INSPECTION AND VERIFY TRANSAXLE RANGE SENSOR MALFUNCTION Yes Replace the TCM, then go to the next step.
(See CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6A-EL] .)
No Go to Step 10.
8 PERFORM DTC INSPECTION AND VERIFY PCM MALFUNCTION
  • Clear the DTC for the start stop unit using the M-MDS. (See CLEARING DTC [START STOP UNIT] .)
  • Switch the ignition ON (engine off).
  • Perform the following work 5 times or more.
    • Operate the selector lever to P or N position and wait for 1 s or more.
    • Operate the selector lever to other than P and N position and wait for 1 s or more.
      • Operate the selector lever to P or N position.
  • Retrieve the start stop unit DTCs using the M-MDS. (See DTC INSPECTION [START STOP UNIT] .)
  • Is the same DTC displayed?
 Yes Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
No Go to Step 10.
9 VERIFY THAT REPAIRS HAVE BEEN COMPLETED Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
10 VERIFY IF OTHER DTCs DISPLAYED
  • Are any other DTCs displayed?
 Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [START STOP UNIT] .)
No DTC troubleshooting completed.
scientia non olet · About LEMON Manuals