Engine Does Not Start

Engine does not Start

DESCRIPTION

1. ENGINE START SYSTEM OPERATION
a. When the engine switch is pressed with the brake pedal depressed and shift lever in P or N, the main body ECU determines that it is an engine start request.
b. The certification ECU and other ECUs perform key verification via the LIN communication line. The engine switch indicator light illuminates in green.
c. The main body ECU activates the D-ACC, D-IG1 and IG2 relays.
d. The certification ECU outputs a steering UNLOCK signal. The signal is sent to the steering lock ECU via the LIN communication line.
e. The main body ECU sends an engine start request signal to the ECM.
f. The ECM sends an ACC cut request signal to the main body ECU.
g. The ECM and main body ECU activate the ST cut relay.
h. The main body ECU deactivates the D-ACC relay until the ECU detects an engine start.







i. The ECU reactivates the D-ACC relay and turns off the engine switch indicator light.

WIRING DIAGRAM
Refer to Computers and Control Systems / Component Tests / Cranking Holding Function Circuit.

Step 1:

Step 1 (Continued)-4:

Step 4 (Continued)-7:

Step 7 (Continued)-9:

Step 9 (Continued):

INSPECTION PROCEDURE