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 PCM HARNESS-SIDE CONNECTOR TERMINALS SPECIFICATIONS 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 PCM HARNESS-SIDE CONNECTOR TERMINALS SPECIFICATIONS 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.
PCM HARNESS-SIDE CONNECTOR TERMINALS SPECIFICATIONS
| 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 (104°F)] | ||
| 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) |