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		Action
1	INSPECT RELAY Switch the ignition to off Disconnect the negative battery cable Remove the starter relay Inspect the starter relay. (See RELAY INSPECTION .) Is there any malfunction?	Yes	Replace the starter relay, then go to Step 8.
1		No	Go to the next step.
2	INSPECT KEYLESS CONTROL MODULE CONNECTOR CONDITION Disconnect the keyless control module connector Inspect the connector and terminals (corrosion, damage, pin disconnection) Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 8.
2		No	Go to the next step
3	INSPECT STARTER RELAY CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the following terminals and body ground Starter relay terminal E (wiring harness-side) Starter relay terminal A (wiring harness-side) Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 8
3		No	Go to the next step
4	INSPECT PCM CONNECTOR CONDITION Disconnect the PCM connector Inspect the connector and terminals (corrosion, damage, pin disconnection). Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 8
4		No	Go to the next step.
5	INSPECT STARTER RELAY CIRCUIT FOR SHORT TO GROUND Inspect for continuity between transaxle range switch terminal F (wiring harness-side) and body ground Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 8.
5		No	Go to the next step.
6	INSPECT PCM Reconnect the disconnected connectors Reconnect the negative battery cable Switch the ignition to ON Measure the voltage between PCM terminal 1BB (wiring harness-side) and body ground Is the voltage normal (See PCM INSPECTION [L5] .)	Yes	Go to the next step
6		No	Replace the PCM, then go to Step 8 (See PCM REMOVAL/INSTALLATION [L5] .)
7	INSPECT KEYLESS CONTROL MODULE Switch the ignition to off Disconnect the negative battery cable. Disconnect the PCM connector Reconnect the negative battery cable. Measure the voltage between keyless control module terminal 4AA (wiring harness-side) and body ground with the shift lever in P or N range Is the voltage more than 4 V?	Yes	Go to the next step
7		No	Replace the keyless control module, then go to the next step (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
8	VERIFY TROUBLESHOOTING COMPLETED Make sure to reconnect the disconnected connectors. Reconnect the negative battery cable. Clear the DTC from keyless control module memory using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .) Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS (See DTC INSPECTION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .) Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
8		No	Go to the next step
9	VERIFY THAT NO OTHER DTCs ARE PRESENT Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
9		No	DTC troubleshooting completed.

Step	Inspection		Action
1	INSPECT RELAY Switch the ignition to off Disconnect the negative battery cable Remove the starter relay Inspect the starter relay (See RELAY INSPECTION ) Is there any malfunction?	Yes	Replace the starter relay, then go to Step 8.
1		No	Go to the next step.
2	INSPECT KEYLESS CONTROL MODULE CONNECTOR CONDITION Disconnect the keyless control module connector Inspect the connector and terminals (corrosion, damage, pin disconnection) Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 8.
2		No	Go to the next step.
3	INSPECT STARTER RELAY CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the following terminals and body ground. Starter relay terminal E (wiring harness-side) Starter relay terminal A (wiring harness-side) Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 8
3		No	Go to the next step.
4	INSPECT PCM CONNECTOR CONDITION Disconnect the PCM connector Inspect the connector and terminals (corrosion, damage, pin disconnection) Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 8
4		No	Go to the next step.
5	INSPECT STARTER RELAY CIRCUIT FOR SHORT TO GROUND Inspect for continuity between starter interlock switch terminal B (wiring harness-side) and body ground Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 8.
5		No	Go to the next step
6	INSPECT PCM Reconnect the disconnected connectors Reconnect the negative battery cable Switch the ignition to ON Measure the voltage between PCM terminal 1BB (wiring harness-side) and body ground Is the voltage normal? (See PCM INSPECTION [L5] .)	Yes	Go to the next step.
6		No	Replace the PCM, then go to Step 8 (See PCM REMOVAL/INSTALLATION [L5] .)
7	INSPECT KEYLESS CONTROL MODULE Switch the ignition to off Disconnect the negative battery cable Disconnect the PCM connector Reconnect the negative battery cable. Measure the voltage between keyless control module terminal 4AA (wiring harness-side) and body ground with the clutch depressed Is the voltage more than 4 V?	Yes	Go to the next step
7		No	Replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
8	VERIFY TROUBLESHOOTING COMPLETED Make sure to reconnect the disconnected connectors Reconnect the negative battery cable Clear the DTC from keyless control module memory using the M-MDS (See CLEARING DTC [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .) Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS (See DTC TABLE [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .) Is the same DTC present?	Yes	Repeat the inspection from Step 1 If the malfunction recurs, replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
8		No	Go to the next step.
9	VERIFY THAT NO OTHER DTCs ARE PRESENT Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
9		No	DTC troubleshooting completed

Step	Inspection		Action
1	INSPECT RELAY Switch the ignition to off Disconnect the negative battery cable Remove the starter relays Inspect the starter relays (See RELAY INSPECTION ) Are there any malfunction?	Yes	Replace the relay, then go to Step 7
1		No	Go to the next step
2	INSPECT KEYLESS CONTROL MODULE CONNECTOR CONDITION Disconnect the keyless control module connector Inspect the connector and terminals (corrosion, damage, pin disconnection) Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 7
2		No	Go to the next step.
3	INSPECT PCM CONNECTOR CONDITION Disconnect the PCM connector Inspect the connector and terminals (corrosion, damage, pin disconnection) Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 7.
3		No	Go to the next step.
4	INSPECT STARTER RELAY CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the following terminals and body ground Starter relay terminal E (wiring harness-side) Starter relay terminal A (wiring harness-side) Starter relay No 2 terminal C (wiring harness-side) Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 7
4		No	Go to the next step.
5	INSPECT PCM Reconnect the disconnected connectors Reconnect the negative battery cable Switch the ignition to ON Measure the voltage between the following terminals and body ground PCM terminal 1F (wiring harness-side) PCM terminal 1BD (wiring harness-side) PCM terminal 1AQ (wiring harness-side) Is the voltage normal? (See PCM INSPECTION [MZI-3.7] .)	Yes	Go to the next step.
5		No	Replace the PCM, then go to Step 7. (See PCM REMOVAL/INSTALLATION [MZI-3.7] .)
6	INSPECT KEYLESS CONTROL MODULE Switch the ignition to off Disconnect the negative battery cable Remove the starter relays Reconnect the negative battery cable Measure the voltage between keyless control module terminal 4AA (wiring harness-side) and body ground with the shift lever in P or N range Is the voltage more than 1.1 V?	Yes	Go to the next step.
6		No	Replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
7	VERIFY TROUBLESHOOTING COMPLETED Make sure to reconnect the disconnected connectors Reconnect the negative battery cable Clear the DTC from keyless control module memory using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .) Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .) Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
7		No	Go to the next step.
8	VERIFY THAT NO OTHER DTCs ARE PRESENT Are any DTCs present?	Yes	Go to the applicable DTC inspection (See DTC TABLE [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
8		No	DTC troubleshooting completed.