Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic Procedure
- CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis check. Refer to "SELF-DIAGNOSTIC RESULT MODE ".
Is any malfunction of the "U1000 CAN COMM CIRCUIT" indicated in the results?
YES: Check CAN communication line. Refer to "DTC U1000 CAN COMMUNICATION LINE ".
NO: GO TO 2.
- CHECK OVERDRIVE CONTROL SWITCH SIGNAL
With CONSULT-III
- Turn ignition switch ON.
- Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
- Read out ON/OFF switching action of the "SPORT MODE SW".ITEM NAME CONDITION CHART
Item name Condition Display value SPORT MODE SW While pushing overdrive cancel switch ON Other conditions OFF
OK or NG
OK: INSPECTION END
NG: GO TO 3.
- CHECK OVERDRIVE CONTROL SWITCH
Check overdrive control switch. Refer to "COMPONENT INSPECTION ".
OK or NG
OK: GO TO 4.
NG: Repair or replace damaged parts.
- CHECK SELF-DIAGNOSTIC RESULTS (COMBINATION METER)
Perform self-diagnosis check. Refer to "SELF-DIAGNOSIS MODE OF COMBINATION METER ".
Is any malfunction detected by self-diagnostic?
YES: Check the malfunctioning system.
NO - 1: With Intelligent Key: GO TO 5.
NO - 2: Without Intelligent Key: GO TO 6.
- CHECK OVERDRIVE CONTROL SWITCH CIRCUIT WITH INTELLIGENT KEY
- Turn ignition switch OFF.
- Disconnect CVT device connector and combination meter connector.
- Check continuity between CVT device harness connector (A) terminal and combination meter harness connector (B) terminal.CONTINUITY REFERENCE CHART
Item Connector Terminal Continuity CVT device harness connector M38 1 Yes Combination meter harness connector M24 29 - Check continuity between CVT device harness connector terminal and ground.CONTINUITY REFERENCE CHART
Item Connector Terminal Continuity CVT device harness connector M38 2 - ground Yes - If OK, check harness for short to ground and short to power.
- Reinstall any part removed.
OK or NG
OK: INSPECTION END
NG: Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK OVERDRIVE CONTROL SWITCH CIRCUIT WITHOUT INTELLIGENT KEY
- Turn ignition switch OFF.
- Disconnect CVT device connector and combination meter connector.
- Check continuity between CVT device harness connector (A) terminal and combination meter harness connector (B) terminal.CONTINUITY REFERENCE CHART
Item Connector Terminal Continuity CVT device harness connector M38 1 Yes Combination meter harness connector M24 29 - Check continuity between CVT device harness connector terminal and ground.CONTINUITY REFERENCE CHART
Item Connector Terminal Continuity CVT device harness connector M38 2 - ground Yes - If OK, check harness for short to ground and short to power.
- Reinstall any part removed.
OK or NG
OK: INSPECTION END
NG: Repair open circuit or short to ground or short to power in harness or connectors.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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