DETECTED CONDITION | POSSIBLE CAUSE |
PAIR control solenoid valve voltage is not input to ECM. | PAIR control solenoid valve circuit open or short PAIR control solenoid valve malfunction ECM malfunction |
Inspection
Step 1
When indicating C49/P1768 for #2
When indicating C61/P1656 for #1
- 1) Turn the ignition switch OFF.
- 2) Lift up the fuel tank. (6-3)
- 3) Check the PAIR control solenoid valve coupler for loose or poor contacts.
If OK, then measure the PAIR control solenoid valve resistance.
- 4) Disconnect the PAIR control valve coupler and measure the resistance between terminals.
- PAIR valve resistance: 18 - 22 Ω at 20 - 30°C (68 - 86°F) (Terminal - Terminal)
- 09900-25008: Multi-circuit tester set
- Tester knob indication: Resistance (Ω)
Is the resistance OK?
YES | Go to Step 2. |
NO | Replace the PAIR valve with a new one. |
- 5) After repairing the trouble, clear the DTC using SDS tool. (5-26)
Step 2
- 1) Turn the ignition switch ON.
- 2) Measure the voltage between O/B wire and ground.
- PAIR valve voltage: Battery voltage
- (+ O/B - − Ground)
- 09900-25008: Multi-circuit tester set
- Tester knob indication: Voltage
Is the voltage OK?
YES | W/G or R/G wire open or shorted to ground, or poor 44 or 63 connection failure. If wire and connection are OK, intermittent trouble or faulty ECM. Recheck each terminal and wire harness for open circuit and poor connection. Replace the ECM with a known good one, and inspect it again. |
NO | Open or short circuit in the O/W wire. |
- 3) After repairing the trouble, clear the DTC using SDS tool. (5-26)
Active control inspection
- 1) Set up the SDS tool. (Refer to the SDS operation manual for further details.)
- 2) Turn the ignition switch ON.
- 3) Click "PAIR Sol operating control" 1.
- 4) Click each button 2.
At this time, if an operation sound is heard from the PAIR control solenoid valve, the function is normal.