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Home >> Mazda >> 2006 >> 6 s, 4D Wagon, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Symptom Troubleshooting [Engine Control System L3)) >> No. 3 Will Not Crank >> Diagnostic procedure

Diagnostic procedure

WARNING: This page is about a different variant/trim than selected.
DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 Connect WDS or equivalent to DLC-2.
Do the following conditions appear?
  • Engine is not completely started.
  • DTC B1681 is displayed.
 Yes Both conditions appear: 
Go to Step 4.
No Either or other condition appears: 
Go to the next step.
2 Is coil connector securely connected to coil? Yes Go to the next step.
No Connect coil connector securely.
Return to Step 1.
3 Does security light illuminate? Yes Go to the next step.
No Inspect instrument cluster and wiring harness.
4 Connect WDS or equivalent to DLC-2 and retrieve DTC.
DTC 
B1213, B1342, B1600, B1601, B1602, B1681, B2103, B2431 		 Yes Go to appropriate DTC test.
No Go to the next step.
5 Is there continuity between PCM GND terminals 1AZ, 1BB, 1BD, 1BH and GND? Yes Go to the next step.
No Repair or replace wiring harness.
6 Measure voltage between PCM GND terminals 1AZ, 1BB, 1BD, 1BH and coil terminal C.
Is the voltage below 1.0 V  ?		 Yes Go to the next step.
No Repair or replace wiring harness.
7 Turn ignition switch to ON position.
Access VPWR PID.
Is VPWR PID normal?
Specification 
Battery voltage 		 Yes Go to the next step.
No Repair or replace wiring harness.
8 Disconnect coil connector.
Turn ignition switch to ON position.
Is there battery voltage at coil connector terminal D (harness-side)?		 Yes Go to the next step.
No Repair or replace wiring harness between coil connector terminal D and fuse panel.
9 Inspect for the following wiring harnesses and connectors:
  • Between coil terminal A and PCM terminal 1F.
  • Between coil terminal B and PCM terminal 1E.

Is there any malfunction?		 Yes Repair or replace wiring harness.
No Go to the next step.
10 Is there continuity between PCM terminal 1B and starter relay with clutch pedal depressed (MTX with starter interlock system), P or N position (ATX)? Yes Go to the next step.
No Repair or replace wiring harness.
11 Inspect the following:
  • Battery connection
  • Battery condition
  • Transaxle is in Park or Neutral. (ATX)
  • Clutch is fully depressed. (MTX)
  • Fuses

Are all items normal?		 Yes Go to the next step.
No Service if necessary.
Repeat Step 11.
12 Is clicking sound heard from starter when ignition switch is turned to START? Yes Go to the next step.
No Go to Step 14.
13 Inspect starting system.
(See STARTER INSPECTION ).
Is starting system normal?		 Yes Inspect for seized/hydrolocked engine, flywheel or drive plate.
(See FLYWHEEL INSPECTION [G35M-R, A65M-R] ).
No Repair or replace components if required.
14 Do any other electrical accessories work? Yes Go to the next step.
No Inspect charging system.
(See BATTERY INSPECTION [L3, AJ] ).
(See GENERATOR INSPECTION [L3, AJ] ).
15
NOTE:
  • The following test should be performed on ATX only. For MTX, go to the next step.
Connect WDS or equivalent to DLC-2.Access TR PID.Turn ignition switch to ON position.Is TR PID indicated P/N when selecting P or N position?		 Yes Go to the next step.
No Inspect adjustment of TR switch.
If TR switch is adjusted properly, inspect for open circuit between TR switch and TCM terminal 2H or starter.
16 Connect WDS or equivalent to DLC-2.
Turn ignition switch to ON position (Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?		 Yes DTC is displayed: 
Go to appropriate DTC test.
Communication error message is displayed: 
Inspect for the following:
  • Open circuit between main relay and PCM terminal 1BE or 1AW(1)
  • Open circuit between main relay terminal E and PCM terminal 1Q
  • Main relay is stuck open.
  • Open or poor GND circuit (PCM terminal 1AZ, 1BB, 1BD or 1BH)
  • Poor connection of vehicle body GND
No No DTC is displayed: 
Inspect the following:
  • START circuit in ignition switch
  • Open circuit between ignition switch and starter
  • Starter interlock switch (MTX)
17 Verify test results.
  • If okay, return to diagnostic index to service any additional symptoms.
  • If malfunction remains, inspect related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.
    • If vehicle is repaired, troubleshooting completed.
    • If vehicle is not repaired or additional diagnostic information is not available, reprogram PCM if later calibration is available. Retest.
(1) California emission regulation applicable ATX model
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