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Home >> Mazda >> 2017 >> CX-9 Touring, AWD >> Repair and Diagnosis (Single Page) >> Drivelines & Axles >> Differentials & Drive Axles >> On-Board Diagnostic - AWD System >> DTC P1887-11; P1887-12; P1887-13; P1887-14; System Wiring Short Circuit To Ground >> Diagnostic Procedure

Diagnostic Procedure

DIAGNOSTIC PROCEDURE

Step Inspection Action
1 INSPECT AWD SOLENOID Yes Replace the coupling component, then go to Step 8.
(See COUPLING COMPONENT REMOVAL/INSTALLATION .)
No Go to the next step.
2 INSPECT AWD SOLENOID POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT Yes Go to the next Step.
No
  • If the open circuit could be detected in the wiring harness:
    • Refer to the wiring diagram and verify whether or not there is a common connector between AWD control module terminal O and AWD solenoid terminal A.
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 an open circuit.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has an open circuit.
  • Go to Step 8.
  • If the resistance is out of specification:
    • Refer to the wiring diagram and verify whether or not there is a common connector between AWD control module terminal O and AWD solenoid terminal A.

    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 an open circuit and a poor ground.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has an open circuit and a poor ground.
  • Go to Step 8.
3 INSPECT AWD SOLENOID POWER SUPPLY CIRCUIT FOR SHORT TO GROUND
  • Disconnect the AWD control module connector. (See AWD CONTROL MODULE REMOVAL/INSTALLATION .)
  • Inspect for continuity between AWD control module terminal O (wiring harness-side) and body ground.
  • Is there continuity?
 Yes Refer to the wiring diagram and verify whether or not there is a common connector between AWD control module terminal O and AWD solenoid terminal A.
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 ground.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

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

Go to Step 8.
No Go to the next step.
4 INSPECT AWD SOLENOID GROUND CIRCUIT FOR OPEN CIRCUIT Yes Go to the next step.
No
  • If the open circuit could be detected in the wiring harness:
    • Refer to the wiring diagram and verify whether or not there is a common connector between AWD control module terminal P and AWD solenoid terminal B.

    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 an open circuit.
    • Repair or replace the malfunctioning part.

      If there is no common connector:

    • Repair or replace the wiring harness which has an open circuit.
    • Go to Step 8.
  • If the resistance is out of specification:
    • Refer to the wiring diagram and verify whether or not there is a common connector between AWD control module terminal P and AWD solenoid terminal B.

    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 an open circuit and a poor ground.
    • Repair or replace the malfunctioning part.

      If there is no common connector:

    • Repair or replace the wiring harness which has an open circuit and a poor ground.
    • Go to Step 8.
5 INSPECT AWD SOLENOID GROUND CIRCUIT FOR SHORT TO GROUND
  • Disconnect the AWD control module connector. (See AWD CONTROL MODULE REMOVAL/INSTALLATION .)
  • Inspect for continuity between AWD control module terminal P (wiring harness-side) and body ground.
  • Is there continuity?
 Yes Refer to the wiring diagram and verify whether or not there is a common connector between AWD control module terminal P and AWD solenoid terminal B.
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 ground.
    • Repair or replace the malfunctioning part.

      If there is no common connector:

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

Go to Step 8.
No Go to the next step.
6 INSPECT AWD SOLENOID POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND
  • Measure the voltage between AWD control module terminal K (wiring harness-side) and body ground.
  • Is the voltage B+?
 Yes Replace the AWD control module, then go to Step 8.
(See AWD CONTROL MODULE REMOVAL/INSTALLATION .)
No Go to the next step.
7 INSPECT FUSE CONDITION
  • Is the fuse (AT 15A) normal?
 Yes Go to the next step.
No
  • If the fuse is blown:
    • Refer to the wiring diagram and verify whether or not there is a common connector between fuse and AWD control module terminal K.

    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 ground.
    • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has a short to ground.
    • Replace the fuse.
    • If the fuse is damaged:
    • Replace the fuse.
Go to the next step.
8 VERIFY DTC TROUBLESHOOTING COMPLETED Yes Replace the AWD control module, then go to the next step.
(See AWD CONTROL MODULE REMOVAL/INSTALLATION .)
No Go to the next step.
9 VERIFY NO DTC IS PRESENT
  • Are any DTCs present?
 Yes Go to the applicable DTC inspection.
(See DTC TABLE [ELECTRONIC AWD CONTROL SYSTEM] .)
No DTC troubleshooting completed.
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