Inspection steps
WARNING: This page is about a different car, the 2014 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.
- Check cruise control main switch circuit.
- Remove the driver's airbag module.
- Disconnect the harness connector of cruise control command switch.
- Turn the ignition switch to ON.
- Measure the voltage between harness connector terminal and chassis ground.VOLTAGE
Inspection terminals Inspection conditions Standard value Z5-4 - chassis ground IG ON 5V or more NG: Check the roll connector, and repair or replace the harness.
OK: Go to Next Step
- Check cruise control main switch circuit.
- Turn the ignition switch to OFF.
- Remove the cruise control command switch.
- Turn the ignition switch to ON.
- Measure the voltage between connector terminal and chassis ground.RESISTANCE (OPEN CIRCUIT CHECK)
Inspection terminals Inspection conditions Standard value Z5-3 - chassis ground IG ON Less than 1 Ω NG: Check ECM, and repair or replace the harness.
OK: Go to Next Step
- Check cruise control main switch circuit.
- Measure the resistance when the cruise control main switch is not in operation.RESISTANCE (OPEN CIRCUIT CHECK)
Inspection terminals Inspection conditions Standard value Cruise control main switch side connector terminal 3 - cruise control main switch side connector terminal 1 IG ON 1 MΩ or more NG: Replace the cruise control main switch.
OK: Go to Next Step
- Measure the resistance when the cruise control main switch is not in operation.
- Check cruise control main switch circuit.
- Measure the resistance when the cruise control ON-OFF switch is pressed.RESISTANCE (OPEN CIRCUIT CHECK)
Inspection terminals Inspection conditions Standard value Cruise control main switch side connector terminal 3 - cruise control main switch side connector terminal 1 IG ON Less than approx. 4 Ω NG: Replace the cruise control main switch.
OK: Go to Next Step
- Measure the resistance when the cruise control ON-OFF switch is pressed.
- Check cruise control main switch circuit.
- Measure the resistance when the CANCEL switch is pressed.RESISTANCE (OPEN CIRCUIT CHECK)
Inspection terminals Inspection conditions Standard value Cruise control main switch side connector terminal 3 - cruise control main switch side connector terminal 1 Always Approx. 1540 Ω NG: Replace the cruise control main switch.
OK: Go to Next Step
- Measure the resistance when the CANCEL switch is pressed.
- Check cruise control main switch circuit.
- Measure the resistance when the -SET switch is pressed.RESISTANCE (OPEN CIRCUIT CHECK)
Inspection terminals Inspection conditions Standard value Cruise control main switch side connector terminal 3 - cruise control main switch side connector terminal 1 Always Approx. 630 Ω NG: Replace the cruise control main switch.
OK: Go to Next Step
- Measure the resistance when the -SET switch is pressed.
- Check cruise control main switch circuit.
- Measure the resistance when the +RES switch is pressed.RESISTANCE (OPEN CIRCUIT CHECK)
Inspection terminals Inspection conditions Standard value Cruise control main switch side connector terminal 3 - cruise control main switch side connector terminal 1 Always Approx. 240 Ω NG: Replace the cruise control main switch.
OK: Replace the ECM.
- Measure the resistance when the +RES switch is pressed.