DESCRIPTIONThe ECM constantly uses 5 V from the battery voltages supplied to the +B (BATT) terminal to operate the microprocessor. The ECM also provides this power to the sensors through the VC output circuit. When the VC circuit is shorted, the microprocessor in the ECM and sensors that are supplied power through the VC circuit are inactivated because the power is not supplied from the VC circuit. Under this condition, the system does not start up and the MIL does not illuminate even if the system malfunctions. HINT: Under normal conditions, the MIL is illuminated for several seconds when the ignition switch is first turned ON. The MIL goes off when the engine is started. WIRING DIAGRAMCAUTION / NOTICE / HINTHINT:
PROCEDURE
(a) Check that the Malfunction Indicator Lamp (MIL) illuminates when turning the ignition switch to ON. OK: MIL lights up.
(a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Check the communication between the Techstream and ECM. Result
(a) Disconnect the B20 throttle body with motor assembly connector. (b) Turn the ignition switch to ON. (c) Check the MIL. Result
HINT: Perform "Inspection After Repair" after repairing the throttle body with motor assembly (See page ).
(a) Disconnect the A57 accelerator pedal sensor assembly connector. (b) Turn the ignition switch to ON. (c) Check the MIL. Result
(a) Disconnect the B16 VVT sensor (for intake side of bank 1) connector. (b) Turn the ignition switch to ON. (c) Check the MIL. Result
(a) Disconnect the B17 VVT sensor (for intake side of bank 2) connector. (b) Turn the ignition switch to ON. (c) Check the MIL. Result
(a) Disconnect the B36 VVT sensor (for exhaust side of bank 1) connector. (b) Turn the ignition switch to ON. (c) Check the MIL. Result
(a) Disconnect the B37 VVT sensor (for exhaust side of bank 2) connector. (b) Turn the ignition switch to ON. (c) Check the MIL. Result
(a) Disconnect the g1 canister pump module connector. (b) Turn the ignition switch to ON. (c) Check the MIL. Result
(a) Disconnect the B20 throttle body with motor assembly connector. (b) Disconnect the B1 ECM connector. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Disconnect the A57 accelerator pedal sensor assembly connector. (b) Disconnect the B1 ECM connector. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Disconnect the B16 VVT sensor (for intake side of bank 2) connector. (b) Disconnect the B1 ECM connector. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Disconnect the B17 VVT sensor (for intake side of bank 1) connector. (b) Disconnect the B36 VVT sensor (for exhaust side of bank 1) connector. (c) Disconnect the B37 VVT sensor (for exhaust side of bank 2) connector. (d) Disconnect the g1 canister pump module connector. (e) Disconnect the B1 ECM connector. (f) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|