Diagnostic Aids

Enter this CIRCUIT TEST only when instructed during QUICK TEST . This test is only intended to diagnose:

CID +, CID -, CID and SIG RTN wiring harness circuits.
CID sensor.
ECA.

Fig 1: CID Harness Circuits (1.9L)

Fig 2: CID Harness Circuits (Mustang 2.3L)

Fig 3: CID Harness Circuits (2.3 HSC & 4.6L)

Fig 4: CID Harness Circuits (3.0L SHO & 3.8L SC)

1) Continuous Memory Code 214 Code 214 indicates error has been detected in CID sensor input signal. Error could be due to a hard fault or an intermittent fault. Possible causes for this fault are:

Open or shorted harness.
Faulty CID sensor.
Faulty ECA.

2) Attempt To Generate Code 214 If engine will not start, go to IGNITION SYSTEMS in I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section. If engine will start, clear continuous memory codes. Start engine. Raise engine speed to 1500 RPM for 10 seconds. Return to idle speed. Raise speed to 1500 RPM for 10 seconds again. Turn ignition off. Perform KOEO SELF-TEST . If Continuous Memory Code 214 is not present, go to step 20). If Continuous Memory Code 214 is present, go to step 3).

3) Check Continuity Of CID Circuits Disconnect CID, camshaft or crankshaft sensor. Disconnect ECA 60-pin connector. Inspect terminals, and repair if damaged. Install EEC-IV Breakout Box (T83L-50-EEC-IV), leaving ECA disconnected. Set DVOM on 200-ohm scale. Measure resistance between CID or CID (+) test pin at breakout box and CID or CID (+) terminal at sensor wiring harness connector. On 1.9L, also measure resistance between test pin No. 42 and CID (-) circuit at CID sensor wiring harness connector. On 2.3L and 4.6L, also measure resistance between test pin No. 46 and SIG RTN circuit at CID sensor wiring harness connector. On all models, go to step 4) if each resistance is less than 5 ohms. If any resistance is 5 ohms or more, repair open circuit and repeat QUICK TEST .

4) Check CID Circuit For Short To Power Turn ignition off. Install breakout box. Ensure ECA and CID sensor are disconnected. Ensure scan tester is not connected to vehicle. On DIS-equipped models, disconnect DIS module pins No. 1-6. Turn ignition on. On all models, measure voltage between CID or CID (+) test pin and test pin No. 40 at breakout box. If voltage is less than 1.0 volt, go to step 5). If voltage is 1.0 volt or more, repair circuit short to power.

5) Check CID Circuit For Short To Ground Turn ignition off. Install breakout box. Ensure ECA and CID sensor are disconnected. On DIS-equipped models, disconnect DIS module pins No. 1-6. On all models, measure resistance between CID or CID (+) test pin and pins No. 16, 40 and 46 at breakout box. On 1.9L, also measure resistance between test pins No. 41 and No. 42. On all models, repair short circuit and repeat QUICK TEST if resistance is less than 10,000 ohms. If resistance is more than 10,000 ohms, go to IGNITION SYSTEMS in I - SYS/COMP TESTS article (DIS-equipped models) or step 6) (except DIS-equipped models).

6) Check For Shorts In ECA With ignition off, breakout box installed and ECA connected, disconnect CID sensor, camshaft sensor or crankshaft sensor. On DIS-equipped models, disconnect DIS module pins No. 1-6 connector. On 1.9L, measure resistance between test pin No. 41 and pins No. 37, 40, 42, 57 and 60 at breakout box. On all other models, measure resistance between test pin No. 24 and pins No. 37, 40, 46, 57 and 60 at breakout box. If each resistance is more than 500 ohms, go to step 7). If any resistance is 500 ohms or less, replace ECA and repeat QUICK TEST .

7) Check CID Sensor Output Turn ignition off. Connect ECA to breakout box. Connect CID or crankshaft sensor. Set DVOM on AC 5-volt scale. Start engine. On 1.9L, measure voltage between test pins No. 41 and 42 while varying engine RPM. On all other models, measure voltage between test pins No. 24 and 40 while varying engine RPM. If voltage varies, replace ECA and repeat QUICK TEST . If voltage does not vary, replace CID or crankshaft sensor and repeat QUICK TEST.

NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 7) to step 20). No test procedures have been omitted.

20) Check CID Circuit Enter wiggle test. See CONTINUOUS MONITOR MODE (WIGGLE TEST) under QUICK TEST . Observe analog VOM or diagnostic tester for indication of fault while performing following: grasp wiring harness near sensor connector while observing VOM or diagnostic tester for fault indication. Shake and bend small sections of harness, working from sensor toward firewall. Shake and bend harness from firewall to ECA. If fault is indicated, isolate fault and repair as necessary. Repeat QUICK TEST. If no fault is indicated, problem cannot be duplicated at this time. Clear codes, and see SYMPTOMS in TESTS W/O CODES article in the ENGINE PERFORMANCE Section.