Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

NO. 3 WILL NOT CRANK [AJ] DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Connect WDS or equivalent to DLC-2. Do following conditions appear? Engine is not completely started. DTC B1681 is displayed.	Yes	Both conditions appear: Go to Step 4.
1		No	Either or other condition appears:
2	Is coil connector securely connected to coil?	Yes	Go to the next step.
2	Is coil connector securely connected to coil?	No	Connect coil connector securely. Return to step 1.
3	Does security light illuminate?	Yes	Go to the next step.
3	Does security light illuminate?	No	Inspect instrument cluster and wiring harness. (See INSTRUMENT CLUSTER INSPECTION .)
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.
4		No	Go to the next step.
5	Is there continuity between PCM GND terminals 6, 22,23,25, 100 and GND?	Yes	Go to the next step.
5		No	Repair or replace wiring harness.
6	Measure voltage between PCM GND terminal 6, 22, 23, 25, 100 and coil terminal C Is voltage below 1.0 V?	Yes	Go to the next step.
6		No	Repair or replace wiring harness.
7	Turn ignition switch to ON position. Measure voltage PCM terminal 34 and 60. Is voltage B+?	Yes	Go to the next step.
7		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.
8		No	Repair or replace wiring harness between coil connector terminal D and fuse panel.
9	Inspect for following wiring harnesses and connectors: Between coil terminal A and PCM terminal 64 Between coil terminal B and PCM terminal 38 Is there any malfunction?	Yes	Repair or replace wiring harness.
9		No	Go to the next step.
10	Is there continuity between PCM terminal 67 and starter relay with clutch pedal depressed (MTX), P or N position (ATX)?	Yes	Go to the next step.
10		No	Repair or replace wiring harness. For ATX inspect starter cut relay and related wiring harness
11	Verify the following: Battery connection Battery condition Transaxle is in Park or Neutral. (ATX) Clutch is fully depressed. (MTX) Fuses Are all items okay?	Yes	Go to the next step.
11		No	Service as necessary. Repeat Step 11.
12	Is clicking sound heard from starter when ignition switch is turned to START position?	Yes	Go to the next step.
12		No	Go to Step 14.
13	Inspect starting system. (See STARTER INSPECTION .) (See STARTER INTERLOCK SWITCH INSPECTION (MTX) .) Is starting system okay?	Yes	Inspect for seized/hydrologic engine, flywheel or drive plate.
13		No	Repair or replace components as required.
14	Do any other electrical accessories work?	Yes	Go to the next step.
14	Do any other electrical accessories work?	No	Inspect charging system. (See BATTERY INSPECTION .) (See GENERATOR INSPECTION .)
15	NOTE: The following test should be performed on ATX only. For MTX, go to the next step. Inspect adjustment of TR switch. (See TRANSAXLE RANGE (TR) SWITCH INSPECTION .) Is TR switch adjusted properly?	Yes	Go to the next step.
15		No	Perform N position learning. (See NEUTRAL POSITION LEARNING .) If problem remains replace TR switch. (See TCM REMOVAL/INSTALLATION .)
16	Connect WDS or equivalent to DLC-2. Turn ignition switch to ON position. Retrieve any DTCs. Are there any DTCs displayed?	Yes	DTC is displayed: Go to appropriated DTC test. Communication error message is displayed: Inspect for following Open circuit between main relay terminal C (harness-side) and PCM terminal 34 or 60 (harness-side) Open main relay GND circuit Main relay is stuck open. Open or poor GND circuit (PCM terminal 6, 22, 23, 25 or 100) Poor connection of vehicle body GND
16		No	No DTC displayed: Inspect START circuit in ignition switch. (See IGNITION SWITCH INSPECTION .) Inspect for open circuit between ignition switch and starter.
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 later calibration is available. Retest.