Diagnostic Procedure

WARNING: This page is about a different car, the 2010 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DTC P081C:62 (ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM) DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	VERIFY RELATED STORED DTC 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 DTC U0001:88 or U0101.00 also present?	Yes	Go to the applicable DTC inspection. (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM] .)
1		No	Go to the next step.
2	INSPECT SELECTOR LEVER COMPONENT CONNECTOR Switch the ignition to off. Disconnect the negative battery cable. Disconnect the selector lever component 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 KEYLESS CONTROL MODULE CONNECTOR 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.
3		No	Go to the next step.
4	INSPECT SELECTOR LEVER COMPONENT CIRCUIT FOR SHORT TO GROUND Selector lever component and keyless control module connectors are disconnected. Inspect for continuity between the following terminal (wiring harness-side) and body ground: Selector lever component terminal G Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 8.
4		No	Go to the next step.
5	INSPECT SELECTOR LEVER COMPONENT CIRCUIT FOR SHORT TO POWER SUPPLY Selector lever component and keyless control module connectors are disconnected. Reconnect the negative battery cable. Switch the ignition to ON. Measure the voltage at the following terminal (wiring harness-side): Selector lever component terminal G Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 8.
5		No	Go to the next step.
6	INSPECT SELECTOR LEVER COMPONENT Inspect the selector lever component. (See SELECTOR LEVER INSPECTION .) Is there any malfunction?	Yes	Replace the selector lever component, then go to Step 8. (See AUTOMATIC TRANSAXLE SHIFT MECHANISM REMOVAL/INSTALLATION .)
6		No	Go to the next step.
7	INSPECT SELECTOR LEVER COMPONENT CIRCUIT FOR OPEN CIRCUIT Selector lever component and keyless control module connectors are disconnected. Switch the ignition to off. Disconnect the negative battery cable. Inspect for continuity between the following terminals (wiring harness-side): Selector lever component terminal G-Keyless control module terminal 3S Is there continuity?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
8	VERIFY TROUBLESHOOTING COMPLETED Make sure to reconnect the disconnected connectors. Reconnect the negative battery cable. Clear the DTC from the keyless control module using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .) Switch the ignition to off, then to ON. 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 DTC P081 C:62 present?	Yes	Replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION .)
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.