LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2022 >> CX-5 Turbo Signature >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Symptom Troubleshooting - Engine (VIN M)) >> No. 3 Will Not Crank >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.
NO. 3 WILL NOT CRANK (SKYACTIV-G 2.5, VIN M) DIAGNOSTIC PROCEDURE

STEP INSPECTION RESULTS ACTION
1 INSPECT POWER SUPPLY
 Yes Go to the next step.
No Inspect the following:
2 DETERMINE IF MALFUNCTION CAUSE IS IMMOBILIZER SYSTEM OR OTHER
  • Are any of the following conditions present?
    • Engine does not start completely.
    • PCM DTC P1260:00 is displayed.
 Yes Both conditions present:
  • Go to Step 5.
No Either or other condition present:
  • Go to the next step.
3 INSPECT PUSH BUTTON START CONNECTOR CONNECTION
  • Inspect the connection of push button start connector.
  • Is the push button start connector securely connected to the coil antenna?
 Yes Go to the next step.
No Reconnect the push button start securely, then repeat from Step 1.
4 DETERMINE IF MALFUNCTION CAUSE IS INSTRUMENT CLUSTER OR OTHER
  • Switch the ignition ON (engine off).
  • Does the security indicator light illuminate?
 Yes Go to the next step.
No Inspect the wiring harness between the following terminals:
  • Instrument cluster terminal B-Front body control module (FBCM) terminal 2K
  • Instrument cluster terminal D-Front body control module (FBCM) terminal 2I
  • Front body control module (FBCM) terminal 2P-PCM terminal 2S
  • Front body control module (FBCM) terminal 2N-PCM terminal 2T
    • If there is any malfunction:
      • Repair or replace the malfunctioning part according to the inspection results, then go to Step 27.
      • Inspect the instrument cluster (See INSTRUMENT CLUSTER INSPECTION ).
    • If there is any malfunction:
5 VERIFY IMMOBILIZER SYSTEM DTC
 Yes Go to the applicable DTC inspection.
(See DTC TABLE [START STOP UNIT] ).
No Go to the next step.
6 VERIFY PCM DTC
 Yes Continuous memory DTC is displayed:
  • Go to the applicable DTC inspection. (See DTC TABLE [PCM (SKYACTIV-G 2.5 (VIN M))] ).

    Communication error message is displayed:

  • Inspect the following:
    • Open circuit in wiring harness between main relay terminal E and PCM terminal 2B
    • Open circuit in wiring harness between main relay terminal C and PCM terminal 2BO or 2BR
    • Main relay (stuck open)
    • Open or short circuit in wiring harness between DLC-2 and PCM terminal 2S or 2T
    • Open or poor ground circuit (PCM terminal 2BQ and 2BT)
    • Poor connection of vehicle body ground
  • Repair or replace the malfunctioning part according to the inspection results.
No Go to the next step.
7 DETERMINE IF MALFUNCTION CAUSE IS STARTER RELAY CONTROL SIGNAL CIRCUIT OR OTHER
  • Switch the ignition ON (engine on).
  • Is a clicking sound heard from the starter relay?
 Yes Go to Step 17.
No Go to the next step.
8 INSPECT TCM CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the TCM connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the connector and/or terminals, then repeat Step 7.
No Go to the next step.
9 INSPECT TCM CIRCUIT FOR OPEN CIRCUIT
  • Verify that the TCM connector is disconnected.
  • Inspect for continuity between TCM terminal J (wiring harness-side) and PCM terminal 2BD (wiring harness-side).
  • Is there continuity?
 Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between TCM terminal J and PCM terminal 2BD.
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.

Repeat Step 7.
10 INSPECT STARTER RELAY
 Yes Replace the starter relay.
Repeat Step 7.
No Go to the next step.
11 INSPECT START STOP UNIT CONNECTOR CONDITION
  • Disconnect the start stop unit connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the connector and/or terminals, then repeat Step 7.
No Go to the next step.
12 INSPECT STARTER RELAY CONTROL CIRCUIT FOR SHORT TO GROUND
  • Verify that starter relay is removed.
  • Verify that the start stop unit connector is disconnected.
  • Inspect for continuity between starter relay terminal A (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 starter relay terminal A and start stop unit terminal 2V.
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.

Repeat Step 7.
No Go to the next step.
13 INSPECT STARTER RELAY CONTROL CIRCUIT FOR OPEN CIRCUIT
  • Verify that starter relay is removed.
  • Verify that the start stop unit connector is disconnected.
  • Inspect for continuity between starter relay terminal A (wiring harness-side) and start stop unit terminal 2V (wiring harness-side).
  • Is there continuity?
 Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between starter relay terminal A and start stop unit terminal 2V.
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.

Repeat Step 7.
14 INSPECT PCM CONNECTOR CONDITION
  • Disconnect the PCM connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the connector and/or terminals, then repeat Step 7.
No Go to the next step.
15 INSPECT STARTER RELAY CONTROL CIRCUIT FOR SHORT TO GROUND
  • Verify that starter relay is removed.
  • Verify that the start stop unit and PCM connectors are disconnected.
  • Inspect for continuity between starter relay terminal E (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 the following terminals:
  • Starter relay terminal E-PCM terminal 2H
  • Starter relay terminal E-Start stop unit terminal 1D

    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.

Repeat Step 7.
No Go to the next step.
16 INSPECT STARTER RELAY CONTROL CIRCUIT FOR OPEN CIRCUIT
  • Verify that starter relay is removed.
  • Verify that the start stop unit and PCM connectors are disconnected.
  • Inspect for continuity between the following terminals (wiring harness-side):
    • Starter relay terminal E-PCM terminal 2H
    • Starter relay terminal E-Start stop unit terminal 1D
  • Is there continuity?
 Yes Inspect the start stop unit.
(See START STOP UNIT INSPECTION ).
No Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
  • Starter relay terminal E-PCM terminal 2H
  • Starter relay terminal E-Start stop unit terminal 1D

    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.

Repeat Step 7.
17 INSPECT STARTER CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the starter connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is the connector normal?
 Yes Go to the next step.
No Repair or replace the connector and/or terminals, then go to Step 27.
18 DETERMINE IF MALFUNCTION CAUSE IS STARTER OR OTHER
  • Verify that the starter connector is disconnected.
  • Crank the engine.
  • Measure the voltage at the starter terminal 2A (wiring harness-side)
  • Is the voltage B+?
 Yes Go to Step 22.
No Go to the next step.
19 INSPECT FOR SHORT TO GROUND AND OPEN CIRCUIT IN SECONDARY (STARTER POWER SUPPLY) OF STARTER RELAY
  • Switch the ignition off.
  • Remove the starter relay.
  • Verify that the starter connector is disconnected.
  • Measure the voltage at the starter relay terminal D (wiring harness-side)
  • Is the voltage B+?
 Yes Go to the next step.
No Inspect the MAIN 200 A fuse and IG2 30 A fuse.
  • If the fuse is blown:
    • Repair or replace the wiring harness for a possible short to ground.
    • Replace the malfunctioning fuse.
  • If the fuse is deteriorated:
    • Replace the malfunctioning fuse.
  • If all fuses are normal:
    • Repair or replace the wiring harness for a possible open circuit.

Go to Step 27.
20 INSPECT STARTER POWER SUPPLY CIRCUIT FOR SHORT TO GROUND
  • Verify that the starter relay is removed.
  • Verify that the starter connector is disconnected.
  • Inspect for continuity between starter relay terminal C (wiring harness-side) and body ground.
  • Is there continuity?
 Yes Repair or replace the wiring harness, then go to Step 27.
No Go to the next step.
21 INSPECT STARTER POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
  • Verify that the starter relay is removed.
  • Verify that the starter connector is disconnected.
  • Inspect for continuity between starter relay terminal C (wiring harness-side) and starter terminal 2A (wiring harness-side).
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace the wiring harness, then go to Step 27.
22 INSPECT STARTER POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT
  • Verify that the starter connector is disconnected.
  • Switch the ignition off.
  • Measure the voltage at the starter terminal 1A (wiring harness-side)
  • Is the voltage B+?
 Yes Go to the next step.
No Inspect the STR 250 A fuse.
  • If the fuse is blown:
    • Repair or replace the wiring harness for a possible short to ground.
    • Replace the fuse.
  • If the fuse is deteriorated:
    • Replace the fuse.
  • If the fuse is normal:
    • Repair or replace the wiring harness for a possible open circuit.

Go to Step 27.
23 INSPECT STARTER
 Yes Go to the next step.
No Replace the starter, then go to Step 27.
(See STARTER REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (VIN M)] ).
24 INSPECT IMMOBILIZER SYSTEM RELATED CIRCUIT
  • Inspect the following wiring harness and connectors:
    • Between push button start terminal A and start stop unit terminal 1AC
    • Between push button start terminal B and start stop unit terminal 1AE
    • Between start stop unit terminal 2M-Front body control module (FBCM) terminal 2K
    • Between start stop unit terminal 2O-Front body control module (FBCM) terminal 2I
    • Between front body control module (FBCM) terminal 2P- PCM terminal 2S
    • Between front body control module (FBCM) terminal 2N-PCM terminal 2T
  • Is there any malfunction?
 Yes Repair or replace the malfunctioning part according to the inspection results.
No Go to the next step.
25 VERIFY PRESENT MALFUNCTION DTC
 Yes Go to the applicable DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-G 2.5 (VIN M))] ).
No Go to the next step.
26 DETERMINE IF MALFUNCTION CAUSE IS BASE ENGINE OR OTHER
  • Inspect for a seized drive plate.
  • Is the drive plate seized?
 Yes Repair or replace the malfunctioning part according to the inspection results.
No Base engine malfunction or engine damage during compression due to liquid (such as water, fuel, or engine oil) penetration into cylinder.
  • Overhaul or replace the engine.
27 Verify the test results.
  • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-G 2.5 (VIN M)] ).
  • If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.
    • If the vehicle is repaired, troubleshooting is completed.
    • If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.
scientia non olet · About LEMON Manuals