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	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins and/or on-line repair information availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information If the vehicle is not repaired, go to the next step.
1		No	Go to the next step.
2	INSPECT CRUISE CONTROL SWITCH CONNECTOR CONDITION Switch the ignition to off. Disconnect the cruise control switch connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion) Is there any malfunction?	Yes	Repair or replace the terminal and/or connector, then go to Step 9.
2		No	Go to the next step.
3	INSPECT PCM CONNECTOR CONDITION Disconnect the PCM connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the terminal and/or connector, then go to Step 8.
3		No	Go to the next step.
4	INSPECT CRUISE CONTROL SWITCH CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the following terminals and body ground. Cruise control switch terminal B (wiring harness-side) Cruise control switch 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 8.
4		No	Go to the next step.
5	INSPECT CRUISE CONTROL SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY Switch the ignition to ON (engine off). Measure the voltage between the following terminals and body ground: Cruise control switch terminal B (wiring harness-side) Cruise control switch terminal C (wiring harness-side) 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 CRUISE CONTROL SWITCH Inspect the cruise control switch. (See CRUISE CONTROL SWITCH INSPECTION [L5] .) Is there any malfunction?	Yes	Replace, the cruise control switch, then go to Step 8. (See AUDIO CONTROL SWITCH REMOVAL/INSTALLATION .)
6		No	Go to the next step.
7	INSPECT CRUISE CONTROL SWITCH CIRCUIT FOR OPEN CIRCUIT Switch the ignition to off. Inspect for continuity between the following terminals: Cruise control switch terminal B (wiring harness-side) and PCM terminal 1AQ (wiring harness-side) Cruise control switch terminal C (wiring harness-side) and PCM terminal 1AN (wiring harness-side) 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 DTC TROUBLESHOOTING COMPLETED Make sure to reconnect all disconnected connectors. Clear the DTC from the PCM memory using the M-MDS. Drive the vehicle using cruise control for 2 min or more. Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L5] .)
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
9		No	DTC troubleshooting completed.