TGE/Troubleshooting 2JZ-GE — Dtc 43 Starter Signal Circuit, page 68

EG–448

ENGINE – 2JZ–GE ENGINE TROUBLESHOOTING

DTC 43 Starter Signal Circuit

CIRCUIT DESCRIPTION
When the engine is being cranked, the intake air flow is slow, so fuel vaporization is poor. A rich mixture is therefore necessary in order to achieve good startability. While the engine is being cranked, the battery positive voltage is applied to terminal STA of the ECM. The starter signal is mainly used to increase the fuel injection volume for the starting injection control and after–start injection control.

DTC No. | Diagnostic Trouble Code Detecting Condition | Trouble Area
43 | No starter signal to ECM | • Open or short in starter signal circuit
• Open or short in ignition switch or starter relay circuit
• ECM

WIRING DIAGRAM

Engine Control Module

7    B    B-W
6    ST    4
1J       1K    B    B    13    B-W
Ignition Switch                         IJ2
J/B No. 1              ω (for M/T)    (for A/T)
                        Clutch          6
4 (1J)                 Start           Park/
                        Switch          Neutral
J/B No.1              B-W    2         Position
4 (1B)                                 5 Switch

B
B              3              B
2 IJ1          EA1    B    ω    B    B    77    STA
W                                              E9
2              EA3    B
                              S3  1
2    2    2                              Starter
AM1
5    1
Starter Relay
2
3    2
R/B No.2
2
ALT
MAIN
1 (2A)    2

B
L-O    6    L-O    10    L-O    25    4
IB2         IF2         T13        T7    W-B
Battery                    Theft Deterrent
                           and Door Lock
                           Control ECU

p21138

E1