Engine Does Not Start

Engine does not Start

DESCRIPTION

ENGINE START SYSTEM FUNCTION

a. If the engine switch is pressed with the shift lever in the P or N position and the brake pedal depressed, 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.
c. The main body ECU activates the ACC relay.
d. The main body ECU activates the IG1 and IG2 relays.
e. The certification ECU outputs a steering UNLOCK signal. The signal is sent to the main body ECU via the steering lock ECU.
f. The main body ECU sends an engine start request signal to the ECM.
g. The ECM sends an ACC cut request signal to the main body ECU.
h. The ECM and main body ECU activate the ST relay.
i. The main body ECU deactivates the ACC relay until the ECU detects an engine start.
j. When engine revolution speed reaches 200 rpm, the main body ECU determines that the engine has been started.

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

Wiring Diagram:

Step 1-3:

Step 3(continued)-6:

Step 6(continued)-8:

Step 8(continued)-10:

Step 11-13:

Step 13(continued):

Step 14-16:

Step 16(continued)-17:

Step 18:

Step 19-21:

Step 21(continued)-23:

Step 23(continued)-24:

INSPECTION PROCEDURE

EMERGENCY ENGINE START CONTROL

If there is a malfunction in the stop light switch or STOP fuse, their signals may not be correctly transmitted to the main body ECU. This may result in the engine not starting even if the engine switch is pressed while the brake pedal is depressed and the shift lever is in the P position.

To activate the starter:
1. Turn the engine switch from off to on (ACC).
2. Press and hold the engine switch for 15 seconds.

HINT: After the main body ECU, certification ECU, steering lock ECU, ID code box and/or ECM are/is replaced, perform the registration procedures for the engine immobilizer system.