CONTROL SYSTEM - Check Point for Each Terminal
F-131spec tableCheck Point for Each Terminal
Check Point for Each Terminal (1A-1O)
1A
Connection toBattery
Abnormal voltageAlways approx. 0V (Battery OK)
Possible cause• ROOM 10A fuse burned
• Open circuit in wiring from ROOM 10A fuse to ECU terminal 1A
1B
Connection toMain relay
Abnormal voltageAlways approx. 0V
Possible cause• Main relay malfunction (Refer to page F-139)
• Open circuit in wiring from main relay to ECU terminal 1B
1C
Connection toIgnition switch (Start position)
Abnormal voltageAlways approx. 0V (Starter turns)
Possible cause• Open circuit in wiring from starter interlock switch to ECU terminal 1C
1D
Connection toSelf-Diagnosis Checker (Monitor lamp)
Abnormal voltageAlways approx. 0V
Possible cause• Main relay malfunction (Refer to page F-139)
• Open circuit in wiring from main relay to diagnosis connector terminal +B
• Open or short circuit in wiring from diagnosis connector terminal MEN to ECU terminal 1D
1D
Connection toSelf-Diagnosis Checker (Monitor lamp)
Abnormal voltageAlways approx. 12V
Possible cause• Poor connection at ECU connector
• ECU malfunction
1D
Connection toSelf-Diagnosis Checker (Monitor lamp)
Abnormal voltageAlways approx. 5V
Possible cause• ECU malfunction
1E
Connection toMalfunction indicator lamp (MIL)
Abnormal voltageAlways below 2.5V (MIL always ON)
Possible cause• Short circuit in wiring from combination meter to ECU terminal 1E
• ECU malfunction
1E
Connection toMalfunction indicator lamp (MIL)
Abnormal voltageAlways below 2.5V (MIL never ON)
Possible cause• Open circuit in wiring from combination meter to ECU terminal 1E
1E
Connection toMalfunction indicator lamp (MIL)
Abnormal voltageAlways approx. 12V
Possible cause• Poor connection at ECU connector
• ECU malfunction
1F
Connection toSelf-Diagnosis Checker (Code No.)
Abnormal voltageAlways below 2.5V (No display on Self-Diagnosis Checker)
Possible cause• Main relay malfunction (Refer to page F-139)
• Open circuit in wiring from main relay to diagnosis connector terminal +B
1F
Connection toSelf-Diagnosis Checker (Code No.)
Abnormal voltageAlways below 2.5V ("88" is displayed and buzzer sounds continuously)
Possible cause• Open or short circuit in wiring from diagnosis connector terminal FEN to ECU terminal 1F
1F
Connection toSelf-Diagnosis Checker (Code No.)
Abnormal voltageAlways approx. 12V
Possible cause• Poor connection at ECU connector
• ECU malfunction
1G / 1H
Connection toIgniter
Abnormal voltageAlways approx. 0V
Possible causeRefer to Code No.01 troubleshooting (Refer to page F-81)
1J
Connection toA/C relay
Abnormal voltageAlways below 2.5V (A/C does not operate)
Possible cause• A/C relay malfunction (Refer to page U-39)
• Open circuit in wiring from main relay to A/C relay
• Open circuit in wiring from A/C relay to ECU terminal 1J
1J
Connection toA/C relay
Abnormal voltageAlways below 2.5V (A/C switch OFF but A/C operates)
Possible cause• Short circuit in wiring from A/C relay to ECU terminal 1J
• ECU malfunction
1J
Connection toA/C relay
Abnormal voltageAlways approx. 12V
Possible cause• A/C switch malfunction (Refer to page U-25)
• Poor connection at ECU connector
• ECU malfunction
1K
Connection toDiagnosis connector (Terminal TEN)
Abnormal voltageAlways approx. 0V
Possible cause• Short circuit in wiring from ECU terminal 1K to diagnosis connector terminal TEN
1K
Connection toDiagnosis connector (Terminal TEN)
Abnormal voltageAlways approx. 12V
Possible cause• Open circuit in wiring from ECU terminal 1K to diagnosis connector terminal TEN
• Open circuit in wiring from diagnosis connector terminal GND to ground
1N
Connection toThrottle sensor (Idle terminal)
Abnormal voltageAlways approx. 0V
Possible cause• Throttle sensor misadjustment (Refer to page F-136)
• Short circuit in wiring from ECU terminal 1N to throttle sensor
• ECU malfunction
1N
Connection toThrottle sensor (Idle terminal)
Abnormal voltageAlways approx. 12V
Possible cause• Throttle sensor misadjustment (Refer to page F-136)
• Open circuit in wiring from ECU terminal 1N to throttle sensor
• Open circuit in wiring from throttle sensor to ground
1O
Connection toStoplight switch
Abnormal voltageAlways approx. 0V (Stoplights OK)
Possible cause• Open circuit in wiring from stoplight switch to ECU terminal 1O