BR–149 BRAKE SYSTEM – TRACTION CONTROL SYSTEM (TRAC) DTC 45 46 Main Throttle Position Sensor Circuit CIRCUIT DESCRIPTION This circuit is not directly related to the TRAC control, but as it has an influence on TRAC control when trouble occurs in this circuit, it is used to switch off the TRAC system as a fail safe function. DTC No. | Diagnostic Trouble Code Detecting Condition | Trouble area 45 Conditions (1) and (2) continue for 0.31 sec.: (1) CTP switch of main throttle position sensor is ON. (2) Input voltage of ECM terminal VTA1: 1.5 V or more. Main throttle position sensor Short in IDL1 circuit ECM TRAC ECU 46 Either of the following (1) or (2) continues for 0.6 sec.: (1) Input voltage of ECM terminal VTA1: 4.9 V or more. (2) Input voltage of ECM terminal VTA1: 0.1 V or less. Main throttle position sensor Open or short in VTA1 circuit ECM WIRING DIAGRAM Main Throttle Position Sensor 1 L-R 2 Y 4 BR-B 3 R ECM 41 (E9) VCC ⊕ 5 V 43 (E9) VTA1 65 (E9) E2 ⊕ 12 V 64 (E9) IDL1 EFI+ 27 (E10) EFI- 26 (E10) B W R TRAC ECU 3 (T10) EFI+ 8 (T10) EFI- ⊕ 5 V 1 (T10) IDL1 R07198