Diagnostic procedure

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

STEP	INSPECTION	RESULTS	ACTION
1	NOTE: The following test should be performed on the advanced keyless entry and push button start system. If not equipped, go to the next step. Insert the emergency key in the emergency slot and start the engine.Does the engine start?	Yes	Inspect the advanced keyless entry and push button start system and repair or replace according to the inspection result. (See SYMPTOM TROUBLESHOOTING CHART [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
1		No	Go to the next step.
2	Connect the M-MDS to the DLC-2. Do the following conditions appear? The engine is not completely started. DTC B10DA:62 is displayed.	Yes	Both conditions appear: Go to Step 5.
2		No	Either condition or other one appears: Go to the next step.
3	Is the coil antenna connector securely connected to the coil antenna?	Yes	Go to the next step
3		No	Connect the coil antenna connector securely Return to Step 1.
4	Does the security light flash?	Yes	Go to the next step.
4	Does the security light flash?	No	Inspect the instrument cluster and the wiring harness. (See INSTRUMENT CLUSTER INSPECTION .)
5	Connect the M-MDS to DLC-2 and retrieve the DTC for the PCM, instrument cluster and keyless control module Are the following DTCs present? B10D5:13, B10D7:05, B10D7:51, D10D7:81, B10D7:94, B10D8:00, B10D9:87, B10DA:51, B10DA:62, U0100:87	Yes	Go to the appropriate DTC inspection.
5		No	Go to the next step.
6	Inspect the following wiring harnesses and connectors: With advanced keyless entry and push button start system: Between coil antenna terminal C and keyless control module terminal 2D Between coil antenna terminal D and keyless control module terminal 2B Between PCM terminal 1AM and keyless control module terminal 2G Between PCM terminal 1AI and keyless control module terminal 2I Without advanced keyless entry and push button start system: Between coil antenna terminal C and instrument cluster terminal 2E Between coil antenna terminal D and instrument cluster terminal 2G Between PCM terminal 1AM and instrument cluster terminal 2X Between PCM terminal 1AI and instrument cluster terminal 2W Is there any malfunction?	Yes	Repair or replace suspected wiring harness and connector
6		No	Go to the next step.
7	Inspect the following: Battery connection Battery condition (See BATTERY INSPECTION [L5] .) Fuses (See NO. 1 MELTING OF MAIN OR OTHER FUSES [L5] ) Selector lever is in P or N position (ATX) Are all items normal?	Yes	Go to the next step, (with advanced keyless entry and push button start system) Go to Step 19. (without advanced keyless entry and push button start system)
7		No	Service if necessary. Repeat Step 7
8	Inspect the starter relay. Is the starter relay normal?	Yes	Go to the next step
8	Inspect the starter relay. Is the starter relay normal?	No	Replace the starter relay.
9	Remove the starter relay Switch the ignition to ON (Engine off) Measure the voltage of the connector terminal (primary coil power supply) on the starter relay wiring harness. Is the voltage B+?	Yes	Go to Step 12.
9		No	Go to the next step
10	Switch the ignition to off Disconnect the keyless control module connector Verify continuity between connector terminal 4B on the keyless control module wiring harness and connector terminal (primary coil power supply) on the starter relay wiring harness Is there continuity?	Yes	Go to the next step.
10		No	Repair or replace suspected wiring harness and connector
11	Verify continuity between connector terminal 4B on the keyless control module wiring harness and body ground Is there continuity?	Yes	Replace the keyless control module. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
11		No	Repair or replace suspected wiring harness and connector.
12	Install the starter relay. Short the terminals of the starter interlock switch connector (2-pin) using a jumper wire (MTX). Short TR switch terminals A and F using a jumper wire (ATX). Switch the ignition to start. Does the engine start?	Yes	Replace the starter interlock switch. (MTX) Replace the TR switch. (ATX)
12		No	Go to the next step.
13	Is the starter relay operation sound heard when the engine starting procedure is performed in Step 12?	Yes	Go to the next step.
13		No	Go to Step 17.
14	Switch the ignition to ON (Engine off) Measure the voltage at keyless control module terminal 4AA. Is the voltage B+?	Yes	Go to the next step.
14		No	Repair or replace suspected wiring harness and connector.
15	Switch the ignition to off. Disconnect the keyless control module, starter interlock switch (MTX) or TR switch (ATX) connectors. Verify continuity between the following terminals: Between connector terminal 4K of the keyless control module wiring harness and starter interlock switch (MTX) Between connector terminal 4K of the keyless control module wiring harness and connector terminal A of the TR switch wiring harness (ATX) Is there continuity?	Yes	Go to the next step.
15		No	Repair or replace suspected wiring harness and connector.
16	Inspect the following: Starter Wiring harness between the starter and ground Starter power supply (from battery through secondary starter relay, to starter) Is there any malfunction?	Yes	Repair or replace the malfunctioning part.
16		No	Replace the keyless control module. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
17	Switch the ignition to off. Disconnect the keyless control module, starter interlock switch (MTX) or TR switch (ATX) connectors Verify continuity between the following terminals: Between connector terminal 4K on the keyless control module wiring harness and starter interlock switch (MTX) Between connector terminal 4K on keyless control module wiring harness and connector terminal A on TR switch wiring harness (ATX). Is there continuity?	Yes	Go to the next step.
17		No	Repair or replace suspected wiring harness and connector
18	Disconnect the PCM connector (with starter interlock switch (MTX) or TR switch (ATX) connectors left removed). Verify continuity between the following terminals: Between the starter interlock switch and PCM terminal 1BB (MTX) Between TR switch terminal A and PCM terminal 1 BB (ATX) Is there continuity?	Yes	Go to Step 27.
18		No	Repair or replace suspected wiring harness and connector.
19	Is there continuity between PCM terminal 1BB and starter relay with P or N position (ATX)/clutch pedal depressed (MTX)?	Yes	Go to the next step.
19		No	Repair or replace the wiring harness.
20	Selector lever is in P or N position (ATX) Depress the clutch pedal. (MTX) Is a clicking sound heard from the starter relay when the switch the ignition to start?	Yes	Go to Step 25
20		No	Go to the next step (ATX) Go to Step 22 (MTX)
21	Connect the M-MDS to the DLC-2 Switch the ignition to ON (Engine off). Access TR PID. Is TR PID indicated P/N when selecting the P or N position?	Yes	Go to Step 23
21		No	Verify that the TR switch is adjusted properly. Inspect for an open or short circuit between the TR switch and the TCM Repair or replace components if required Then repeat Step 20
22	Inspect the starter interlock switch. (See STARTER INTERLOCK SWITCH INSPECTION [L5] .) Is the starter interlock switch normal?	Yes	Go to the next step.
22		No	Inspect the starter interlock switch and related wiring harnesses Repair or replace components if required. Then repeat Step 20.
23	Inspect the starter relay and the following wiring harnesses: Between the starter relay and the PCM. Between the starter relay and the ignition switch. (See RELAY INSPECTION .) Are they normal?	Yes	Go to the next step
23		No	Repair or replace components if required Then repeat Step 20.
24	Inspect the ignition switch and related wiring harnesses. Are they normal?	Yes	Go to the next step
24		No	Repair or replace components if required Then repeat Step 20
25	Inspect the following wiring harnesses: Between the starter relay and the battery. Between the starter relay and the starter. Are they normal?	Yes	Go to the next step
25		No	Repair or replace if required Then go to the next step.
26	Inspect the starting system (See STARTER INSPECTION [L5] .) Is the starting system normal?	Yes	Go to the next step.
26		No	Repair or replace components if required.
27	Inspect for a seized/hydro locked engine or flywheel (MTX) or drive plate (ATX). Is the engine seized or hydro locked?	Yes	Go to the next step.
27		No	Repair or replace components if required.
28	Connect the M-MDS to the DLC-2 Retrieve any continuous memory DTCs Are there any continuous memory DTCs displayed?	Yes	DTC is displayed: Go to the appropriate DTC inspection. (See DTC TABLE [L5] .) Communication error message is displayed: Inspect for the following Open circuit in the wiring harness between main relay terminal B and PCM terminal 1Q Open circuit in the wiring harness between main relay terminal E and PCM terminal 1A, 1B Main relay is stuck open Open or short circuit in the wiring harness between the DLC-2 and PCM terminals 1AM or 1AI Open or poor ground circuit (PCM terminal 1E, 1F, 1G, 1BE, or 1BF) Poor connection of vehicle body ground.
28		No	No DTC is displayed: Go to the next step
29	Retrieve any KOEO DTCs using M-MDS. Are there DTCs displayed during the KOEO inspection?	Yes	DTC is displayed: Go to the appropriate DTC inspection (See DTC TABLE [L5] .)
29		No	No DTC is displayed: Inspect the following Start circuit in ignition switch Open circuit in wiring harness between ignition switch and starter
30	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If a 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.