Terminal Resistance And Continuity Check
- Turn the ignition switch to OFF.
- Disconnect the PCM connector.
- Measure the resistance and check for continuity between the terminals of the PCM harness-side connector while referring to the check chart.NOTE:
- When measuring resistance and checking continuity, a harness for checking connect pin pressure should be used instead of inserting a test probe.
- Checks do not have to be carried out in the order given in this chart.
CAUTION: If resistance or continuity checks are performed on the wrong terminals, damage to the vehicle wiring, sensors, PCM, and/or ohmmeter may occur. Use care to prevent this! - If the ohmmeter shows any deviation from the normal condition, check the corresponding sensor, actuator and related electrical wiring, and then repair or replace.
- After repair or replacement, recheck with the ohmmeter to confirm that the repair or replacement has corrected the problem.
TERMINAL RESISTANCE AND CONTINUITY SPECIFICATION
| Terminal No. | Inspection item | Normal condition (Check condition) |
|---|---|---|
| C121-A (1)~C121-B (1) | No.1 injector | 13-16Ω [At 20°C(68°F) |
| C121-A (9)~C121-B (1) | No.2 injector | |
| C121-A (24)~C121-B (1) | No.3 injector | |
| C121-A (2)~C121-B (1) | No.4 injector | |
| C121-A (10)~C121-B (1) | No.5 injector | |
| C121-A (25) ~C121-B (1) | No.6 injector | |
| C121-A (6) ~C121-B (1) | EGR solenoid | 62-74Ω [At 20°C(68°F)] |
| C121-A (34)~C121-B (1) | Evaporative emission purge solenoid | 24.5~27.5Ω [At 20°C(68°F)] |
| C121-B (8) - Body ground | PCM ground | Continuity (0Ω) |
| C121-A (13)~C121-B (1) | Heated oxygen sensor heater (B2/S1) | 7-40Ω [At 20°C(68°F)] |
| C121-A (14) ~C121-B (1) | Heated oxygen sensor heater (B2/S1) | |
| C121-A (28)~C121-B (1) | Heated oxygen sensor (B2/S2) | 7-40Ω [At 20°C(68°F)] |
| C121-A (29) ~C121-B (1) | Heated oxygen sensor (B1/S2) | |
| C121-B (24)~C121-C (24) | Intake air temperature sensor | 5.3-6.7Ω [When intake air temperature is 0°C(32°F)] |
| 2.3-3.0Ω [When intake air temperature is 20°C(68°F)] | ||
| 1.0-1.5Ω [When intake air temperature is 40°C(104°F)] | ||
| 0.30-0.42Ω [When intake air temperature is 80°C(176°F)] | ||
| C121-B (4)~C121-C (24) | Engine coolant temperature sensor | 5.1 -6.5Ω [When coolant temperature is 0°C(32°F)] |
| 2.1-2.7Ω [When coolant temperature is 20°C(68°F)] | ||
| 0.9-1.3Ω [When coolant temperature is 40°C(104cF)] | ||
| 0.26-0.36Ω [When coolant temperature is 80°C(176°F)] | ||
| C121-C (9)~C121-C (24) | Closed throttle position switch | Continuity (When throttle valve is at idle position) |
| No continuity (When throttle valve is slightly open) | ||
| C121-D (21) -Body ground | Park/Neutral position switch (A/T) | Continuity (When select lever is at P or N) |
| No continuity (When select lever is at D, 2, L or R) |