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 FUSE Switch the ignition to off Disconnect the negative battery cable Remove the ST SIG 5 A fuse Inspect the ST SIG 5 A fuse Is there any malfunction?	Yes	Replace the ST SIG 5 A fuse, then go to Step 6
1		No	Go to the next step.
2	INSPECT RELAY Remove the starter relay. Inspect the starter relay (See RELAY INSPECTION .) Is there any malfunction?	Yes	Replace the starter relay, then go to Step 6
2		No	Go to the next step
3	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 6
3		No	Go to the next step
4	INSPECT STARTER RELAY CIRCUIT FOR OPEN CIRCUIT Install the ST SIG 5 A fuse Install the starter relay. Inspect for continuity between the following terminals. Starter relay terminal E (wiring harness-side) and keyless control module terminal 4B (wiring harness-side) Starter relay terminal A (wiring harness-side) and keyless control module terminal 4AA (wiring harness-side) Is there continuity?	Yes	Go to the next step.
4		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 6
5	INSPECT KEYLESS CONTROL MODULE Reconnect the disconnected connectors Reconnect the negative battery cable Bring the valid key into the vehicle Measure the voltage between the following terminals and body ground with the shift lever in P range. Keyless control module terminal 4B (wiring harness-side) Keyless control module terminal 4AA (wiring harness-side) Is the voltage more than 4 V?	Yes	Go to the next step.
5		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] .)
6	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] .)
6		No	Go to the next step.
7	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] .)
7		No	DTC troubleshooting completed.

Step	Inspection		Action
1	INSPECT KEYLESS CONTROL MODULE CONNECTOR CONDITION Switch the ignition to off. Disconnect the negative battery cable. 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 4
1		No	Go to the next step.
2	INSPECT STARTER RELAY CIRCUIT FOR OPEN CIRCUIT Inspect for continuity between the following terminals. Starter interlock switch terminal A (wiring harness-side) and keyless control module terminal 4AA (wiring harness-side) Transaxle range switch terminal B (wiring harness-side) and keyless control module terminal 4K (wiring harness-side) Is there continuity?	Yes	Go to the next step.
2		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 4
3	INSPECT KEYLESS CONTROL MODULE Reconnect the disconnected connectors Reconnect the negative battery cable Bring the valid key into the vehicle. Measure the voltage between the following terminals and body ground with the clutch depressed. Keyless control module terminal 4B (wiring harness-side) Keyless control module terminal 4AA (wiring harness-side) Is the voltage more than 4 V?	Yes	Go to the next step.
3		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] .)
4	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] .)
4		No	Go to the next step.
5	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] .)
5		No	DTC troubleshooting completed.

Step	Inspection		Action
1	INSPECT FUSE Switch the ignition to off. Disconnect the negative battery cable Remove the ST SIG 5 A fuse Inspect the ST SIG 5 A fuse. Is there any malfunction?	Yes	Replace the ST SIG 5 A fuse, then go to Step 5.
1		No	Go to the next step.
2	INSPECT RELAY Remove the starter relay Inspect the starter relay (See RELAY INSPECTION ) Is there any malfunction?	Yes	Replace the starter relay, then go to Step 5
2		No	Go to the next step
3	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 5
3		No	Go to the next step
4	INSPECT KEYLESS CONTROL MODULE Reconnect the disconnected connectors Reconnect the negative battery cable. Bring the valid key into the vehicle Measure the voltage between the following terminals and body ground with the shift lever in P range Keyless control module terminal 4B (wiring harness-side) Keyless control module terminal 4AA (wiring harness-side) Is the voltage more than 2 V	Yes	Go to the next step.
4		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] .)
5	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] .)
5		No	Go to the next step
6	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] .)
6		No	DTC troubleshooting completed