DTC C1745: Exhaust Solenoid Valve Circuit Malfunction (TO 08/2009): Procedure
- INSPECT HEIGHT CONTROL COMPRESSOR ASSEMBLY (EXHAUST VALVE)
- Turn the engine switch off.
- Disconnect the exhaust valve connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Condition Specified Condition 2 (B) - 1 (L) at 15 to 25°C (59 to 77°F) 10 to 14 Ω TEXT IN ILLUSTRATION*1 Component without harness connected
(Exhaust Valve) - Inspect if the exhaust valve is stuck:
- Connect a positive (+) lead from the battery to terminal 2 (B) and a negative (-) lead to terminal 1 (L).
- Check the operating sound of the exhaust valve.
OK
It makes an operating sound (click).
NG → See step 4
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (EXHAUST VALVE - SUSPENSION CONTROL ECU AND BODY GROUND)
- Turn the engine switch off.
- Disconnect the A54 ECU connector.
- Disconnect the O27 exhaust solenoid valve connector.
- Measure the resistance according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard resistance
Tester Connection Condition Specified Condition O27-2 (B) - A54-9 (SLEX) Always Below 1 Ω A54-9 (SLEX) - Body ground Always 10 kΩ or higher O27-1 (L) - Body ground Always Below 1 Ω TEXT IN ILLUSTRATION*1 Front view of wire harness connector
(to Exhaust Valve)*2 Rear view of wire harness connector
(to Suspension Control ECU)
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 3
- REPLACE SUSPENSION CONTROL ECU. Refer to REMOVAL
- REPLACE HEIGHT CONTROL COMPRESSOR ASSEMBLY. Refer to REMOVAL