Inspection Steps
WARNING: This page is about a different car, the 2019 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 cruise control command switch connector.
- Turn the ignition switch to ON.
- Measure the voltage between connector terminal and chassis ground.
VOLTAGE SPECIFICATIONInspection terminals Inspection conditions Standard value Z8-11 - 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.
- Measure the resistance between connector terminal and chassis ground.
STANDARD VALUE RESISTANCE SPECIFICATION (OPEN CIRCUIT CHECK)Inspection terminals Inspection conditions Standard value Z8-10 - chassis ground Always Less than 10 Ω NG: Check ECM and roll connector, 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.
STANDARD VALUE RESISTANCE SPECIFICATION (OPEN CIRCUIT CHECK)Inspection terminals Inspection conditions Standard value Cruise control main switch side connector terminal 10 - cruise control main switch side connector terminal 11 IG ON 1 MΩ or more NG: Replace the cruise control main switch.
OK: Go to next step
- Check cruise control main switch circuit.
- Measure the resistance when the cruise control ON-OFF switch is pressed.
STANDARD VALUE RESISTANCE SPECIFICATION (OPEN CIRCUIT CHECK)Inspection terminals Inspection conditions Standard value Cruise control main switch side connector terminal 10 - cruise control main switch side connector terminal 11 IG ON Less than 1 Ω NG: Replace the cruise control main switch.
OK: Go to next step
- Check cruise control main switch circuit.
- Measure the resistance when the CANCEL switch is pressed.
STANDARD VALUE RESISTANCE SPECIFICATION (OPEN CIRCUIT CHECK)Inspection terminals Inspection conditions Standard value Cruise control main switch side connector terminal 10 - cruise control main switch side connector terminal 11 Always Approx. 1540 Ω NG: Replace the cruise control main switch
OK: Go to next step
- Check cruise control main switch circuit.
- Measure the resistance when the -SET switch is pressed.
STANDARD VALUE RESISTANCE SPECIFICATION (OPEN CIRCUIT CHECK)Inspection terminals Inspection conditions Standard value Cruise control main switch side connector terminal 10 - cruise control main switch side connector terminal 11 Always Approx. 630 Ω NG: Replace the cruise control main switch.
OK: Go to next step
- Check cruise control main switch circuit.
- Measure the resistance when the +RES switch is pressed.
STANDARD VALUE RESISTANCE SPECIFICATION (OPEN CIRCUIT CHECK)Inspection terminals Inspection conditions Standard value Cruise control main switch side connector terminal 10 - cruise control main switch side connector terminal 11 Always Approx. 240 Ω NG: Replace the cruise control main switch.
OK: Go to next step
Replace the ECM.