DTC P1270 Mercury Mystique I

This DTC indicates that engine or vehicle speed has exceeded calibrated limit. Possible causes are as follows

1. Wheel slippage caused by mud, ice, water, snow, etc.
2. Over revved engine.
3. Vehicle driven at excessive rate of speed.

If any of the specified causes have occurred, system is okay. Clear PCM memory. If none of specified causes have occurred, clear PCM memory. If no other faults are present, testing is complete.

Diagnostic Aids

Perform this test when instructed during QUICK TEST or if directed by other test procedures. This test is used to diagnose the following

Scheme 92

1. Standard Corporate Protocol (SCP) communication circuits BUS (+) and BUS (-).
2. Wiring harness circuits (CHASSIS GROUND, PWR GND and VBAT).
3. Faulty Powertrain Control Module (PCM). (Scheme 92): Identifying Data Link Connector (DLC) Test Circuit & Connector Terminals

Scheme 93

1. 1) Verify Self-Test Procedure Is Correct Ensure scan tester is correctly attached to DLC located under dash panel. Ensure scan tester is not damaged or defective. Verify correct self-test procedure is used. Correct as necessary. If no faults are found, go to next step.
2. 2) Check For VREF At TP Sensor Turn ignition off. Disconnect TP sensor. Turn ignition on. Measure voltage between SIG RTN terminal and VREF terminal at TP wiring harness connector. (Scheme 93) If voltage is 4-6 volts, go to next step. If voltage is not 4-6 volts, go to «CIRCUIT TEST C»(ref-24082-S14410186652001010400000). NOTE: KOER SELF-TEST failure or Communication Error message could result if a failure is present in MAF sensor, MLP sensor, VSS or related circuits. (Scheme 93): Identifying TP Sensor Harness Connector Terminals
3. 3) Ability To Access Continuous Memory DTCs If Continuous Memory DTCs were accessible, go to next step. If Continuous Memory DTCs were not accessible, go to step 7).
4. 4) Ability To Activate KOEO SELF-TEST If KOEO SELF-TEST was entered, go to next step. If KOEO SELF-TEST was not entered, go to step 6).
5. 5) Ability To Activate KOER SELF-TEST If KOER SELF-TEST was entered, DTC is false. Obtain PCM part number and check manufacturer for correct PCM application. If KOER SELF-TEST was not entered, go to next step for alternative fuel models or step 7) for all other models.
6. 6) If self-test was performed using gasoline, go to next step. If self-test was performed on alternative fuel, repeat QUICK TEST using gasoline. If still unable to retrieve trouble codes, go to next step.
7. 7) Perform «QUICK TEST»(ref-24082-S37578241852001010400000). If any DTCs are present, service as necessary before continuing. If unable to retrieve trouble codes, go to next step.
8. 8) Check For Voltage At Data Link Connector (DLC) Inspect DLC for damage and repair as necessary. Turn ignition on. Measure voltage between B+ terminal of DLC and engine ground. If 10.5 volts or more are present, go to next step. If less than 10.5 volts are present, repair open in B+ circuit and repeat «QUICK TEST»(ref-24082-S37578241852001010400000).
9. 9) Check DLC Ground Circuit Continuity Turn ignition off. Measure resistance between CHASSIS GROUND terminal of DLC and engine ground. If less than 5 ohms are present, go to next step. If 5 ohms or more are present, repair open in CHASSIS GROUND circuit and repeat «QUICK TEST»(ref-24082-S37578241852001010400000).
10. 10) Check DLC PWR GND Circuit Continuity Turn ignition off. Disconnect PCM 104-pin connector. Inspect pins for damage and repair if necessary. Install EEC-V Breakout Box (014-00950), leaving PCM disconnected. Measure resistance between test pins No. 51 and 103 (PWR GND) at the breakout box and PWR GND terminal of DLC. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in PWR GND circuit to DLC and repeat «QUICK TEST»(ref-24082-S37578241852001010400000).
11. 11) Check BUS(-) Circuit Leave ignition off. Measure resistance between test pin No. 15 (BUS-) at the breakout box and BUS(-) terminal of DLC. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in BUS(-) circuit to DLC and repeat «QUICK TEST»(ref-24082-S37578241852001010400000).
12. 12) Leave ignition off. Disconnect scan tester from DLC (if applicable). Measure resistance between test pin No. 15 at the breakout box and engine ground. If resistance is 10,000 ohms or more, go to next step. If resistance is less than 10,000 ohms, repair short to ground in BUS(-) circuit and repeat «QUICK TEST»(ref-24082-S37578241852001010400000).
13. 13) Turn ignition on. Measure voltage between test pin No. 15 and test pins No. 51 and 103 (PWR GND) at the breakout box and engine ground. If voltage is less than 6.0 volts, go to next step. If voltage is 6.0 volts or more, repair short to power in BUS(-) circuit and repeat «QUICK TEST»(ref-24082-S37578241852001010400000).
14. 14) Check BUS(+) Circuit Continuity Turn ignition off. Measure resistance between test pin No. 16 (BUS+) at the breakout box and BUS(+) terminal of DLC. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in BUS(+) circuit to DLC and repeat «QUICK TEST»(ref-24082-S37578241852001010400000).
15. 15) Check BUS(+) Circuit For Short To Ground Leave ignition off and scan tester disconnected from DLC. Measure resistance between chassis ground and test pin No. 16 (BUS+) at the breakout box. If resistance is more than 10,000 ohms, go to next step. If resistance is 10,000 ohms or less, repair BUS(+) circuit short to ground and repeat «QUICK TEST»(ref-24082-S37578241852001010400000).
16. 16) Check BUS(+) Circuit For Short To Power Turn ignition on. Measure voltage between test pin No. 16 and test pins No. 51 and 103 (PWR GND) at the breakout box. If voltage is less than 1.0 volt, go to next step. If voltage is 1.0 volt or more, repair short to power in BUS(+) circuit and repeat «QUICK TEST»(ref-24082-S37578241852001010400000).
17. 17) Power Take Off (PTO) Applications If vehicle is equipped with PTO, go to next step. If vehicle is not equipped with PTO, replace PCM and repeat «QUICK TEST»(ref-24082-S37578241852001010400000).
18. 18) Check PTO On/Off Input Turn ignition off. While toggling switch, measure voltage between test pin No. 4 (PTO) and test pins No. 51 and 103 (PWR GND) at the breakout box. If voltage is less than 1.0 volt with PTO off, and 1.0 volt or more with PTO on, PTO circuit is okay. Replace PCM and repeat «QUICK TEST»(ref-24082-S37578241852001010400000). If voltage is not as specified, go to «CIRCUIT TEST FB»(ref-24082-S07204038252001010400000).

KAPWR is interrupted when PCM or battery is disconnected. DTC P0603/P1605 may be generated during the next PCM power-up.

Perform this test when instructed during QUICK TEST or if directed by other test procedures. This test is used to diagnose the following

Scheme 94

1. Battery terminal condition.
2. Keep Alive Power (KAPWR) circuit routing.
3. KAPWR circuit condition.
4. Faulty Powertrain Control Module (PCM). (Scheme 94): Keep Alive Power (KAPWR) Circuit Schematic

1. 1) DTC P0603/P1605: Check Battery Terminals Inspect battery terminals for corrosion or loose connection. Service or replace as necessary. If battery terminals are okay, go to next step.
2. 2) Check Wiring Harness Inspect wiring harness and connectors for damage or corrosion. Ensure wiring harness is not improperly routed too close to ignition or exhaust components. Service or replace if necessary. If wiring harness looks okay, go to next step.
3. 3) Check KAPWR Circuit Turn ignition off. Disconnect PCM 104-pin connector. Inspect pins for damage. Install EEC-V Breakout Box (014-00950), leaving PCM disconnected. Connect DVOM between test pin No. 55 (KAPWR) and test pins No. 51 and 103 (PWR GND) at breakout box. Shake and bend small sections of wiring harness between PCM and dash panel. If voltage is continuously 10.5 volts or more, go to next step. If voltage drops to less than 10.5 volts, isolate open in KAPWR circuit and repair as necessary. Repeat «QUICK TEST»(ref-24082-S37578241852001010400000) .
4. 4) Check For DTC P0603/P1605 Perform «KOEO SELF-TEST»(ref-24082-S17000748712001010400000) . If DTC P0603/P1605 is present, replace PCM and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) . If any other DTCs are present, service as necessary. If no trouble codes are present, testing is complete.

Perform this test when instructed during QUICK TEST or if directed by other test procedures. This code indicates that On Board Diagnostics II (OBD II) system self-testing has not been completed. To erase DTC P1000, a complete drive cycle, with successful OBD II system self-test, must occur.

A drive cycle consists of vehicle warmed to normal engine temperature and operated in all speed ranges. After self-test successfully completes, SYSTEM PASS can be obtained from PCM.

DTC P1000 will set in PCM memory when any of the following conditions occur

1. Battery or PCM has been disconnected.
2. An OBD II monitor has failed before completion of drive cycle.
3. PCM memory has been erased with a scan tester.

1. 1) Check For Other DTCs If any trouble codes are present, service as necessary. If no trouble codes are present, and vehicle is equipped with PTO, go to next step. If no trouble codes are present, and vehicle is not equipped with PTO, go to step 3).
2. 2) Check PTO PID Turn ignition off. Connect scan tester to Data Link Connector (DLC). Start engine and allow to idle. Using scan tester, access PTO STAT PID. Cycle PTO switch/activator on and off. If PTO STAT PID does not cycle on and off, go to «CIRCUIT TEST FB»(ref-24082-S07204038252001010400000) . If PTO STAT PID cycles on, pauses, and then cycles off, PTO is okay. Go to next step.
3. 3) Attempt To Remove DTC P1000 Test drive vehicle to complete drive cycle. Cruise at 20-45 MPH for at least 4 minutes. Cruise at 30-40 MPH for at least 60 seconds. Cruise at 40-65 MPH for at least 80 seconds. If DTC P1000 is still present, go to next step. If DTC P1000 is not present, testing is complete.
4. 4) Check VSS PID Turn ignition off. Connect scan tester to Data Link Connector (DLC). Using scan tester, access VSS PID. Test drive vehicle to complete drive cycle. If VSS PID is more than zero, go to next step. If VSS PID is zero, repair open in VSS circuit and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) .
5. 5) Check ECT Temperature Ensure engine is at operating temperature. Using scan tester, access ECT PID. If ECT PID is more than 180°F (82°C), repeat step 3). If ECT PID is less than 180°F (82°C), repair cooling system fault and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) .

Perform this test when instructed during QUICK TEST or if directed by other test procedures. This code indicates that anti-theft system has been activated. When activated, anti-theft system will disable fuel system. To disarm anti-theft system, use key or remote keyless entry to unlock door.

1. 1) Check For Other DTCs If any other DTCs are present, service as necessary. If no DTCs other than P1260 are present, go to next step.
2. 2) Use key or remote keyless entry to disarm anti-theft system. Clear PCM memory. Start engine. If engine starts, testing is complete. If engine does not start, go to next step.
3. 3) Perform «QUICK TEST»(ref-24082-S37578241852001010400000) . If DTC P1260 is still present, fault is in anti-theft system.

Perform this test when instructed during QUICK TEST or if directed by other test procedures. This test is used to diagnose the following

Scheme 95

1. Wiring harness circuits (CPP, PNP and SIG RTN).
2. Faulty Clutch Pedal Position (CPP) switch.
3. Faulty Park & Neutral Position (PNP) switch.
4. Faulty Powertrain Control Module (PCM). (Scheme 95): Identifying CPP & PNP Switch Test Circuit & Connector Terminals

1. 1) DTC P0704 & P1709: Check CPP/PNP Switch Function These DTCs indicate CPP/PNP switch malfunction. Possible causes are as follows: Starter relay disconnected during KOER SELF-TEST. CPP/PNP switch circuit damage. Faulty CPP/PNP switch. Faulty Powertrain Control Module (PCM). Turn ignition off. Connect scan tester to Data Link Connector (DLC). Ensure shift lever is in Neutral. Turn ignition on. Using scan tester, access CPP/PNP PID. While observing CPP/PNP PID, apply and release clutch pedal. If CPP/PNP PID does not cycle on and off, go to next step. If CPP/PNP PID cycles on and off, check PCM connector. If connector is okay, replace PCM.
2. 2) Check CPP/PNP Switch Turn ignition off. Locate CPP switch near clutch pedal or PNP switch near transmission shift linkage. Inspect switch and bracket for damage and repair if necessary. Disconnect CPP/PNP switch wiring harness connector. Inspect terminals for damage and repair if necessary. Measure resistance between switch terminals. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, replace CPP/PNP switch and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) .
3. 3) Check CPP Circuit Turn ignition off. Disconnect scan tester. Disconnect PCM 104-pin connector. Inspect pins for damage. Install EEC-V Breakout Box (014-00950), leaving PCM disconnected. Measure resistance between test pin No. 64 (CPP) at breakout box and CPP terminal at CPP switch wiring harness connector. Measure resistance between test pin No. 91 (SIG RTN) at breakout box and SIG RTN terminal at CPP/PNP switch wiring harness connector. If both resistance measurements are less than 5 ohms, go to next step. If either resistance is 5 ohms or more, repair open circuit and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) .
4. 4) Leave ignition off and CPP switch disconnected. Measure resistance between chassis ground and test pins No. 64 and 91 (SIG RTN) at breakout box. If resistance is more than 10,000 ohms, replace PCM and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) . If resistance is 10,000 ohms or more, repair short circuit and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) .
5. 5) DTC P0704 & P1709: Check CPP/PNP Switch Function These DTCs indicate CPP/PNP switch malfunction. Possible causes are as follows: Starter relay disconnected during KOER SELF-TEST. CPP/PNP switch circuit damage. Faulty CPP/PNP switch. Faulty Powertrain Control Module (PCM). Turn ignition off. Ensure shift lever is in Neutral. Connect scan tester to Data Link Connector (DLC). Turn ignition on. Using scan tester, access CPP/PNP PID. While observing CPP/PNP PID, apply and release clutch pedal; place shift lever in gear then return to Neutral. If CPP/PNP PID does not cycle on and off, go to next step. If CPP/PNP PID cycles on and off, check PCM connector. If connector is okay, replace PCM.
6. 6) Check CPP/PNP Switch Turn ignition off. Locate CPP switch near clutch pedal or PNP switch near transmission shift linkage. Inspect switch and brackets for damage and repair if necessary. Disconnect CPP/PNP switch wiring harness connector. Inspect terminals for damage and repair if necessary. Measure resistance between CPP switch terminals with clutch pedal down. Measure resistance between PNP switch terminals with shift lever in Neutral. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, replace CPP/PNP switch and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) .
7. 7) Check CPP/PNP Circuit Turn ignition off. Disconnect scan tester. Disconnect PCM 104-pin connector. Inspect pins for damage. Install EEC-V Breakout Box (014-00950), leaving PCM disconnected. Measure resistance between test pin No. 64 (CPP) at breakout box and CPP/PNP terminal at CPP/PNP switch wiring harness connector. Measure resistance between test pin No. 91 (SIG RTN) at breakout box and SIG RTN terminal at CPP/PNP switch wiring harness connector. If both resistance measurements are less than 5 ohms, go to next step. If either resistance is 5 ohms or more, repair open circuit and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) .
8. 8) Leave ignition off and CPP/PNP switch disconnected. Measure resistance between chassis ground and test pins No. 64 and 91 (SIG RTN) at breakout box. If resistance is more than 10,000 ohms, replace PCM and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) . If resistance is 10,000 ohms or more, repair short circuit and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) .

Perform this test when instructed during QUICK TEST or if directed by other test procedures. This test is used to diagnose the following

Scheme 96

1. Wiring harness circuits (TCIL and TCS).
2. Faulty Powertrain Control Module (PCM). (Scheme 96): TCIL & TCS Circuit Schematic

1. 1) DTC P1780 Turn ignition off. Connect scan tester to Data Link Connector (DLC). Start engine and allow to idle. Using scan tester, access TCS PID. Cycle TCS switch, then hold depressed. If TCS PID is on, go to next step. If TCS PID is off, repeat «KOER SELF-TEST»(ref-24082-S07955820122001010400000) to cycle TCS.
2. 2) Check TCS Circuit Voltage Turn ignition off. Disconnect PCM 104-pin connector. Inspect pins for damage. Install EEC-V Breakout Box (014-00950), leaving PCM disconnected. Turn ignition on. Measure voltage between test pin No. 29 (TCS) and test pins No. 24 and 77 (PWR GND) at breakout box while cycling TCS. If voltmeter reading does not cycle when TCS is cycled, go to next step. If voltmeter reading cycles when TCS is cycled, replace PCM and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) .
3. 3) Check Circuit For Short To Ground Turn ignition off. Disconnect TCS. Inspect pins for damage and repair if necessary. Measure resistance between breakout box test pin No. 29 (TCS) and test pins No. 24 and 77 (PWR GND). If resistance is 10,000 ohms or more, go to next step. If resistance is less than 10,000 ohms, repair short circuit and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) .
4. 4) Check Continuity Of TCS Circuits Leave ignition off. Connect ohmmeter positive lead to TCS key power at the fuse panel. Connect negative lead to power terminal of TCS wiring harness connector. Note resistance measurement. Measure resistance between breakout box test pin No. 29 (TCS) and TCS terminal of TCS connector. If both resistance measurements are less than 5 ohms, go to next step. If either resistance measurement is 5 ohms or more, repair open circuit and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) .
5. 5) Check Circuit For Short To Power Leave ignition off. Measure resistance between breakout box test pin No. 29 (TCS) and test pins No. 71 and 97 (VPWR). If resistance is 10,000 ohms or more, replace TCS switch and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) . If resistance is less than 10,000 ohms, repair short circuit and repeat «QUICK TEST»(ref-24082-S37578241852001010400000) .
6. 6) Check TCIL PID Turn ignition off. With scan tester connected to Data Link Connector (DLC), access TCIL PID. Cycle TCS switch. If TCIL PID changes from ON to OFF, fault is intermittent. Go to «CIRCUIT TEST Z»(ref-24082-S16577748702001010400000) . If TCIL PID does not change as specified, go to next step.
7. 7) Check For Short to Ground In TCIL Circuit Turn ignition off. Disconnect PCM 104-pin connector. Inspect pins for damage and repair if necessary. Turn ignition on. If TCIL goes off, replace PCM. If TCIL remains on, repair TCIL circuit short to ground.
8. 8) Check For DTC P1780 Perform «KOER SELF-TEST»(ref-24082-S07955820122001010400000) . If DTC P1780 is not present, go to next step. If DTC P1780 is present, go to step 1).
9. 9) Turn ignition on. Measure voltage between TCIL test pin and test pins No. 24 and 76 (PWR GND) at breakout box. If voltage is 2 volts or more, replace PCM. If voltage is less than 2 volts, check indicator bulb and fuse. If bulb and fuse are okay, repair open circuit between test pin No. 79 and ignition switch.

Perform this test when instructed during QUICK TEST or if directed by other test procedures. Before continuing with this circuit test, ensure that the following areas are in good condition

Scheme 97

1. Air induction system.
2. Vacuum hoses and connections.
3. Wiring harness connectors.
4. Fuel level and quality.
5. Added aftermarket equipment.
6. Base engine. (Scheme 97): Testing Typical PCM Output Control Circuit

1. 1) Intermittent Test Procedure Proceed to the appropriate circuit test as follows: INPUT CIRCUIT TEST PRIORITY Circuit (1) Step 10) (2) Step 30) (3) Step 40) ACCS 1st 3rd 2nd BOO 1st 3rd 2nd CMP (4) 1st 2nd 3rd DPFEGR 1st 2nd 3rd ECT 1st 2nd 3rd FP 1st 3rd 2nd IAT 1st 2nd 3rd IMRCM 1st 2nd 3rd MAF 1st 2nd 3rd OCTADJ 1st 3rd 2nd O2S 1st 3rd 2nd PF 1st 2nd 3rd PSP 1st 3rd 2nd TCS 1st N/A 2nd TFT 1st 3rd 2nd TP 1st 3rd 2nd TPB 1st 3rd 2nd TR 1st 3rd 2nd VSS 1st 3rd 2nd (1) Input test (sensor) procedure. (2) Water soak check procedure. (3) Road test procedure. (4) Go to step 50) before performing WATER SOAK TEST. OUTPUT CIRCUIT TEST PRIORITY Circuit (1) Step 20) (2) Step 30) (3) Step 40) ACP 1st 3rd 2nd AIR 1st 3rd 2nd EVAPCVA 1st 3rd 2nd EVAPCP 1st 3rd 2nd EPC 1st 3rd 2nd EVRVR 1st 3rd 2nd FPM 1st 3rd 2nd HFC 1st 3rd 2nd HTR11A 1st 3rd 2nd HTR12A 1st 3rd 2nd HTR21A 1st 3rd 2nd HTR22A 1st 3rd 2nd IAC 1st 3rd 2nd IMRC 1st 3rd 2nd INJ 1st 3rd 2nd LFC 1st 3rd 2nd MIL 1st N/A 2nd SS1 1st 3rd 2nd SS2 1st 3rd 2nd SS3 1st 3rd 2nd TCTC (4) 1st 3rd 2nd TCC 1st 3rd 2nd TCIL 1st N/A 2nd WAC 1st 3rd 2nd 4X4L 1st 3rd 2nd (1) Output test (actuator) procedure. (2) Water soak check procedure. (3) Road test procedure. (4) Go to step 50) before performing WATER SOAK TEST. NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 1) to step 10). No test procedures have been omitted.
2. 10) Intermittent Input Test (Sensor) Procedure Turn ignition off. Connect scan tester to DLC. Access PIDs from the area of suspected wiring or component fault. Turn ignition on. While observing PID value, wiggle and pull on component wiring and connector. See PIN VOLTAGE/PID VALUE CHARTS article in this section. Lightly tap on component. If PID value(s) is okay, go to next step. If sudden change occurs in PID value or PID value drops out of sensor range, isolate fault and repair as necessary. If fault cannot be located, replace suspect component. If replacement component does not repair fault, install original component and go to next step.
3. 11) Leave ignition on with PIDs accessed. While observing PID value, wiggle and pull on wiring harness between suspect component and PCM. Lightly tap on component. If PID value(s) remain within specification, go to next step. If sudden change occurs in PID value or PID value drops out of sensor range, isolate fault and repair as necessary. If fault cannot be located, replace PCM. If replacement PCM does not repair fault, install original PCM. Return to step 1) and choose another procedure.
4. 12) Intermittent Input KOER Wiggle Test Leave ignition on with PIDs accessed. Access PIDs from the area of suspected wiring or component fault. Start engine and allow to idle. While observing PID value, wiggle and pull on component wiring and connector. See PIN VOLTAGE/PID VALUE CHARTS article in this section. Lightly tap on component. If PID value(s) is okay, go to next step. If sudden change occurs in PID value or PID value drops out of sensor range, isolate fault and repair as necessary. If fault cannot be located, replace suspect component. If replacement component does not repair fault, install original component and go to next step.
5. 13) Leave engine running at idle speed with PIDs accessed. While observing PID value, wiggle and pull on wiring harness between suspect component and PCM. Lightly tap on component. If PID value(s) remain within specification, fault cannot be identified with this procedure. Return to step 1) and choose another procedure. If sudden change occurs in PID value or PID value drops out of sensor range, isolate fault and repair as necessary. If fault cannot be located, replace PCM. If replacement PCM does not repair fault, install original PCM. Return to step 1) and choose another procedure. NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 13) to step 20). No test procedures have been omitted.
6. 20) Intermittent Output Test (Actuator) Procedure If no symptoms or trouble codes are present, perform road test procedure specified insteps 40) through 43). Turn ignition off. Connect scan tester to DLC. Access PIDs from the area of suspected wiring or component fault. Record trouble codes in PCM memory, if present. Disconnect 104-pin connector from PCM. Install Breakout Box (014-000959). Connect PCM to breakout box. Connect positive lead of voltmeter to output control circuit of suspect component. (Scheme 97) Connect negative lead to ground. Turn ignition on. Using scan tester, enter Output Test Mode. Activate suspect component. While observing voltmeter reading and PID value, lightly tap on component. Compare readings to specification. See PIN VOLTAGE/PID VALUE CHARTS article in this section. If readings are correct and remain stable within one volt, go to next step. If readings are incorrect or unstable within one volt, replace component. If replacement component does not repair fault, install original component and go to next step.
7. 21) Leave ignition on with PIDs accessed. While observing voltmeter reading and PID value, wiggle and pull on wiring harness between suspect component and PCM. Lightly tap on component. Compare readings to specification. See PIN VOLTAGE/PID VALUE CHARTS article in this section. If readings are correct and remain stable within one volt, fault cannot be identified with this procedure. Return to step 1) and choose another procedure. If readings are incorrect or unstable within one volt, isolate fault and repair as necessary. NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 21) to step 30). No test procedures have been omitted.
8. 30) Intermittent Water Soak Check Procedure Turn ignition off. Connect scan tester to DLC. Access PIDs from the area of suspected wiring or component fault. Start engine and allow to idle. Spray water on suspect component, circuit and connector. Watch for fault indicated by incorrect PID value, sudden change in PID value or fluctuating engine speed. If no faults occur, go to next step. If fault occurs, isolate and repair as necessary.
9. 31) With engine running, spray water on spark plugs, spark plug wires, ICM, CKP sensor and CMP sensor. Watch for fault indicated by incorrect PID value, sudden change in PID value or fluctuating engine speed. See PIN VOLTAGE/PID VALUE CHARTS article in this section. If no faults occur, fault cannot be identified with this procedure. Return to step 1) and choose another procedure. If fault occurs, isolate and repair as necessary. NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 31) to step 40). No test procedures have been omitted.
10. 40) Intermittent Road Test Procedure This procedure will monitor PIDs and components using a scan tester on a road test. An assistant is necessary for some procedures. This procedure is performed under 4 different conditions; KOEO, engine running at idle speed, 30 MPH and 55 MPH. Compare information with specifications listed in PIN VOLTAGE/PID VALUE CHARTS article in this section. Turn ignition off. Connect scan tester to DLC. Access PIDs from the area of suspected wiring or fault. Compare values to KOEO values given in PIN VOLTAGE/PID VALUE CHARTS article in this section. Watch for fault indicated by PID value out of specification. If no faults occur, go to next step. If fault occurs, go to step 10) for input system fault or step 20) for output system fault.
11. 41) With scan tester connected to DLC, remain in PID access mode. Start engine and allow to idle. With engine warmed to operating temperature, watch for fault indicated by incorrect PID value, sudden change in PID value or fluctuating engine speed. Compare values to HOT IDLE values given in PIN VOLTAGE/PID VALUE CHARTS article in this section. If values remain within specification, go to next step. If values do not remain within specification, go to step 10) for input system fault or step 20) for output system fault.
12. 42) Leave scan tester connected to DLC in PID access mode. Ensure all accessories are off. Using an assistant, test drive vehicle at 30 MPH. Watch for fault indicated by incorrect PID value, sudden change in PID value or fluctuating engine speed. Compare values to 30 MPH values given in PIN VOLTAGE/PID VALUE CHARTS article in this section. If values remain within specification, go to next step. If values do not remain within specification, go to step 10) for input system fault or step 20) for output system fault.
13. 43) Leave scan tester connected to DLC in PID access mode. Test drive vehicle at 55 MPH. Watch for fault indicated by incorrect PID value, sudden change in PID value or fluctuating engine speed. Compare values to 55 MPH values given in J- PIN VOLTAGE/PID VALUE CHARTS article in this section. If values remain within specification, fault cannot be identified with this procedure. Return to step 1) and choose another procedure. If values do not remain within specification, go to step 10) for input system fault or step 20) for output system fault. NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 43) to step 50). No test procedures have been omitted.
14. 50) Intermittent Ignition Test Procedure Ensure all accessories are off. Perform «QUICK TEST»(ref-24082-S37578241852001010400000). If trouble codes are present, service as necessary before continuing. If no trouble codes are present, connect Intermittent Ignition Analyzer (007-000075) and go to next step. If intermittent ignition analyzer is not available, return to step 1) and choose another procedure.
15. 51) Turn ignition off. Ensure all accessories are off. Install correct overlay on front of tester panel. Install program cartridge in slot. Connect EI HIGH DATA RATE harness adapter to DIST tester. Ensure that CKP SIMULATION switch and WIGGLE TEST switch are off. Disconnect ICM wiring harness connector. Check connector terminals for damage or contamination and repair as necessary. Attach male ICM connector of tester to ICM wiring harness connector. Attach female ICM connector of tester to ICM. Turn ignition on and press tester RESET button. If tester performs self-test and VPWR LED comes on, go to step 53). If tester does not perform self-test or VPWR LED does not come on, go to next step.
16. 52) Scan Tester Check Turn ignition off. Disconnect intermittent ignition analyzer. Connect jumper wire between VPWR terminal of tester and positive battery terminal. Connect jumper wire between PWR GND terminal of tester and negative battery terminal. If tester passes self-test, go to step 220). If tester does not pass self-test, repair or replace as necessary and go to next step.
17. 53) Recreate Fault Turn ignition on. Check Fault Memory and System Status LEDs. If LEDs are not on, go to next step. If LEDs are on, go to step 270).
18. 54) Test drive vehicle. If vehicle will not start, crank engine for 5-10 seconds. If FAULT MEMORY or SYSTEM STATUS are not on, go to step 1). If FAULT MEMORY or SYSTEM STATUS LEDs are on, go to step 270). NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 54) to step 190). No test procedures have been omitted.
19. 190) Check For VPWR Turn ignition on. Measure voltage between VPWR jack of intermittent ignition analyzer and negative battery terminal. If voltage is 6 volts or more, go to next step. If voltage is less than 6 volts, repair open in VPWR circuit to ICM.
20. 191) Check PWR GND Circuit Turn ignition off. Measure resistance between PWR GND jack of intermittent ignition analyzer and negative battery terminal. If resistance is less than 5 ohms, go to next step. If voltage is 5 ohms or more, repair open in PWR GND circuit to ICM.
21. 192) Wiggle Check Connect jumper wire between PWR GND jack of intermittent ignition analyzer and negative battery terminal. Shake and bend wiring harness and connectors. If the intermittent ignition analyzer performs reset, repair open in VPWR circuit to ICM. If the intermittent ignition analyzer does not perform reset, repair open in PWR GND circuit to ICM. NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 192) to step 220). No test procedures have been omitted.
22. 220) Check For Coil Faults Turn ignition on. Press ignition analyzer RESET button. If COIL FAULT MEMORY LED is off, go to next step. If COIL FAULT MEMORY LED is on or flashing, go to step 229).
23. 221) Check CASE GND/CKP SHIELD Turn ignition on. If CASE GND/CKP SHIELD FAULT MEMORY LED is off, go to next step. If CASE GND/CKP SHIELD FAULT MEMORY is on or flashing, go to step 253).
24. 222) Check CKP BIAS Leave ignition on. If CKP BIAS SYSTEM STATUS LED is on, go to next step. If CKP BIAS SYSTEM STATUS LED is off, go to step 243).
25. 223) Test drive vehicle. If vehicle will not start, crank engine for 5-10 seconds. If COIL FAULT MEMORY LEDs are not on, go to next step. If COIL FAULT MEMORY LEDs are on, go to step 229).
26. 224) Leave ignition on. If CASE GND/CKP SHIELD FAULT MEMORY LEDs are not on, go to next step. If CASE GND/CKP SHIELD FAULT MEMORY LEDs are on, go to step 253).
27. 225) Leave ignition on. If CKP FAULT MEMORY LEDs are not on, go to next step. If CKP FAULT MEMORY LEDs are on, go to step 247).
28. 226) Leave ignition on. If CTO FAULT MEMORY LEDs are not on, go to next step. If CTO FAULT MEMORY LEDs are on, go to step 239).
29. 227) Leave ignition on. If CKP SIGNAL SYSTEM STATUS LEDs are on, ignition system is okay and testing is complete. If CKP SIGNAL SYSTEM STATUS LEDs are not on, go to step 247). NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 227) to step 229). No test procedures have been omitted.
30. 229) VBATC Circuit Check Turn ignition off. Disconnect ignition coil packs. Connect Intermittent Ignition Analyzer (007-000075). Turn ignition on. Measure voltage between B+ terminal at ignition coil pack wiring harness connector and PWR GND jack of ignition analyzer. If voltage is 10-14 volts, go to next step. If voltage is not 10-14 volts, repair open in B+ circuit.
31. 230) Check For Short Turn ignition off. Measure resistance between PWR GND jack and COIL jack of ignition analyzer. Measure resistance between VPWR jack and COIL jack of ignition analyzer. If resistance is 6000 ohms or more, go to next step. If resistance is less than 6000 ohms, go to step 236).
32. 231) Check Coil Line Resistance Turn ignition off. Measure resistance between each COIL jack of ignition analyzer and same terminal at ignition coil harness connector. If resistance is 5000 ohms or less, go to next step. If resistance is more than 5000 ohms, repair circuit and retest system.
33. 232) Check Coil Line For Short Leave ignition off. Measure resistance between each COIL jack of ignition analyzer. If resistance is 10,000 ohms or more, go to next step. If resistance is less than 10,000 ohms, go to step 237).
34. 233) Check For Hard Faults Reconnect coil packs. Turn ignition on. Press ignition analyzer RESET button. Wait for initialization and coil test. If COIL FAULT MEMORY LED is off, go to next step. If CKP SHD LED is on or flashing, go to step 238).
35. 234) Wiggle Test Mode B Turn intermittent ignition analyzer WIGGLE TEST switch on. Turn MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
36. 235) Turn ignition off. Disconnect coil packs. Turn ignition on. Press RESET button and wait 5 seconds for initialization. If fault memory LEDs are off, replace PCM. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
37. 236) Circuit Check Turn ignition off. Disconnect PCM. Reconnect DIST to vehicle harness. Measure resistance between each COIL jack and PWR GND jack of ignition analyzer. Measure resistance between COIL jack and VPWR jack. If resistance is 10,000 ohms or more, replace PCM. If resistance is less than 10,000 ohms, repair open in COIL circuit.
38. 237) Turn ignition off. Disconnect PCM. Measure resistance between each COIL jack and all other COIL jacks of intermittent ignition analyzer. If each resistance is 10,000 ohms or more, replace PCM. If resistance is less than 10,000 ohms, repair open in COIL circuit.
39. 238) System Visual Check Leave ignition off. Check ignition system for damage, loose connections or corrosion. Repair if necessary. If ignition system looks okay, replace ignition coil pack(s).
40. 238) Circuit Check Turn ignition off. Measure resistance between CTO jack and PWR GND jack of ignition analyzer. Measure resistance between CTO jack and VPWR jack. If resistance is 1000 ohms or less, go to next step. If resistance is more than 1000 ohms, go to step 241).
41. 240) Leave ignition off. Disconnect PCM. Reconnect DIST to vehicle harness. Measure resistance between CTO jack and PWR GND jack of ignition analyzer. Measure resistance between CTO jack and VPWR jack. If resistance is 1000 ohms or more, replace PCM. If resistance is less than 1000 ohms, repair fault in CTO circuit.
42. 241) Wiggle Test Mode B Turn ignition on. Turn WIGGLE TEST switch on. Set MODE switch to "B". Press intermittent ignition analyzer RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
43. 242) For 4 or 6 cylinder models, set MODE switch to "A". For 8 cylinder models, set MODE switch to "C". Press intermittent ignition analyzer RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, replace PCM and retest. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
44. 243) Check CKP BIAS Turn ignition off. Disconnect CKP sensor harness connector. Turn ignition on. Press ignition analyzer RESET button and wait 5 seconds for initialization. If CKP BIAS SYSTEM STATUS LEDs are off, go to next step. If CKP BIAS SYSTEM STATUS LEDs are on, go to step 245).
45. 244) Turn ignition off. Disconnect PCM. Reconnect DIST to vehicle harness. Measure resistance between CKP+ jack and PWR GND jack of ignition analyzer. Measure resistance between CKP+ jack and VPWR jack. If resistance is 10,000 ohms or more, replace PCM. If resistance is less than 10,000 ohms, repair fault in CKP circuit.
46. 245) Circuit Check Leave ignition off. Measure resistance between CKP- jack and PWR GND jack of ignition analyzer. Measure resistance between CKP- jack and VPWR jack. If resistance is 10,000 ohms or less, go to next step. If resistance is more than 10,000 ohms, replace CKP sensor and retest.
47. 246) Turn ignition off. Disconnect PCM. Reconnect DIST to vehicle harness. Measure resistance between CKP- jack and PWR GND jack of ignition analyzer. Measure resistance between CKP- jack and VPWR jack. If resistance is 10,000 ohms or more, replace PCM. If resistance is less than 10,000 ohms, repair fault in CKP circuit.
48. 247) Check CKP Signal Press ignition analyzer RESET button and wait 5 seconds for initialization. Crank or start engine. If CKP SIGNAL SYSTEM STATUS LEDs are off, go to next step. If CKP SIGNAL SYSTEM STATUS LEDs are on, go to step 252).
49. 248) Circuit Check Turn ignition off. Disconnect CKP sensor. Measure resistance between CKP+ terminal of CKP sensor wiring harness connector and CKP+ jack of intermittent ignition analyzer. Measure resistance between CKP- terminal of CKP sensor wiring harness connector and CKP- jack of intermittent ignition analyzer. If both resistance measurements are less than 5000 ohms, go to next step. If resistance is 5000 ohms or more, repair CKP circuit and retest.
50. 249) Leave ignition off. Measure resistance between CKP+ jack and CKP- jack of ignition analyzer. If resistance is less than 10,000 ohms, go to next step. If resistance is 10,000 ohms or more, go to step 251).
51. 250) Leave ignition off. Disconnect PCM. Reconnect DIST to vehicle harness. Measure resistance between CKP+ jack and CKP- jack of ignition analyzer. If resistance is less than 10,000 ohms, repair CKP circuit and retest. If resistance is 10,000 ohms or more, replace PCM and retest.
52. 251) Sensor Check Turn ignition off. Inspect CKP sensor and data wheel for damage, correct alignment and air gap. Service sensor and data wheel as necessary. If no problems are found, replace CKP sensor.
53. 252) Wiggle Test Mode B Turn ignition on. Turn WIGGLE TEST switch on. Set MODE switch to "B". Press intermittent ignition analyzer RESET button and wait 5 seconds for initialization. If any fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
54. 253) Check CKP SHD For Short To Power Measure resistance between CASE GND/CKP SHD jack and VPWR jack of ignition analyzer. If resistance is less than 10,000 ohms, go to next step. If resistance is 10,000 ohms or more, go to step 255).
55. 254) Isolate Short Leave ignition off. Disconnect PCM. Reconnect DIST to vehicle harness. Measure resistance between CASE GND/CKP SHD jack and VPWR jack of ignition analyzer. If resistance is less than 10,000 ohms, repair CASE GND/CKP SHD circuit and retest. If resistance is 10,000 ohms or more, replace PCM and retest.
56. 255) Wiggle Test Mode B Turn ignition on. Turn WIGGLE TEST switch on. Set MODE switch to "B". Press intermittent ignition analyzer RESET button and wait 5 seconds for initialization. If any fault memory LEDs are off, repair CASE GND/CKP SHD circuit and retest. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located. NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 255) to step 270). No test procedures have been omitted.
57. 270) Check For Coil Fault If COIL FAULT MEMORY LED is off, go to next step. If COIL FAULT MEMORY LED is on, go to step 277).
58. 271) Check For IDM Fault If IDM FAULT MEMORY LED is off, go to next step. If IDM FAULT MEMORY is on or flashing, go to step 287).
59. 272) Check PIP Active Fault If PIP ACTIVE SYSTEM STATUS LED is on, go to next step. If PIP ACTIVE SYSTEM STATUS LED is off, go to step 291).
60. 273) If PIP FAULT MEMORY LED is off, go to next step. If PIP FAULT MEMORY LED is on, go to step 291).
61. 274) If PIP DUTY FAULT MEMORY LED is off, go to next step. If PIP DUTY FAULT MEMORY LED is on, go to step 291).
62. 275) Check For Base Timing Fault If BASE TIMING SYSTEM STATUS LED is off, go to next step. If BASE TIMING SYSTEM STATUS LED is on, go to step 302).
63. 276) Check For SPOUT Fault If SPOUT FAULT MEMORY LED is off, go to step 59). If SPOUT FAULT MEMORY LED is on, go to step 310).
64. 277) Check Coil Voltage Turn ignition on. Measure voltage between COIL jack and IGN GND jack of ignition analyzer. If voltage is 10-14 volts, go to next step. If voltage is not 10-14 volts, go to step 280).
65. 278) Check For Short To PWR Turn ignition off. Disconnect ignition coil. Measure resistance between COIL jack and ICM PWR jack of ignition analyzer. If resistance is 2000 ohms or less, go to next step. If resistance is more than 2000 ohms, go to step 284).
66. 279) Turn ignition off. Disconnect ICM. Measure resistance between COIL jack and ICM PWR jack of ignition analyzer. If resistance is 10,000 ohms or less, repair circuit and retest. If resistance is less than 2000 ohms, replace ICM.
67. 280) Check Coil Pack PWR Turn ignition off. Disconnect ignition coil. Turn ignition on. Measure voltage between COIL jack and IGN GND jack of ignition analyzer. If voltage is 10-14 volts, go to next step. If voltage is not 10-14 volts, repair circuit and retest.
68. 281) Check For Short To GND Turn ignition off. Measure resistance between COIL jack and ICM GND jack of ignition analyzer. If resistance is 10,000 ohms or more, go to next step. If resistance is less than 10,000 ohms, go to step 283).
69. 282) Check Harness Resistance Turn ignition off. Measure resistance between COIL jack of ignition analyzer and COIL terminal of harness connector. If resistance is 5 ohms or more, repair circuit. If resistance is less than 5 ohms, replace ignition coil.
70. 283) Check Harness For Short To GND Turn ignition off. Disconnect ICM. Measure resistance between COIL jack and ICM GND jack of ignition analyzer. If resistance is 10,000 ohms or more, replace ICM. If resistance is less than 10,000 ohms, repair circuit.
71. 284) Check Coil Reconnect coil. Turn ignition on. Press ignition analyzer RESET button and wait 5 seconds for initialization. If COIL FAULT MEMORY LED is on, replace coil. If COIL FAULT MEMORY LED is off, go to next step.
72. 285) Wiggle Test Mode B Turn ignition on. Turn WIGGLE TEST switch on. Set MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
73. 286) Turn ignition off. Disconnect coil. Turn ignition on. Press ignition analyzer RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, replace ICM and retest. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
74. 287) Perform QUICK TEST If any KOEO or KOER DTCs are present, go to appropriate CIRCUIT TEST. If Continuous Memory DTC P1351 is present, go to step 289). If no DTCs are present, go to next step.
75. 288) Wiggle Test Mode B Turn ignition on. Turn WIGGLE TEST switch on. Set MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located. If all fault memory LEDs are off, fault cannot be duplicated at this time. Go to step 1) and choose another procedure.
76. 289) Turn ignition off. Install EEC-V Breakout Box (014-00950) leaving PCM disconnected. Measure resistance between IDM/START jack of intermittent ignition analyzer test pin No. 48 at the breakout box. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit and retest.
77. 290) Wiggle Test ROVING Turn ignition off. Connect PCM to breakout box. Using jumper wire, connect ROVING jack of intermittent ignition analyzer to test pin No. 48 at the breakout box. Turn WIGGLE TEST switch on. Set MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, fault cannot be duplicated at this time. Go to step 1) and choose another procedure.
78. 291) Check For Short Turn ignition off. Measure resistance between IGN GND jack and PIP jack of intermittent ignition analyzer. Measure resistance between ICM PWR jack and PIP jack of intermittent ignition analyzer. If both resistance measurements are 10,000 ohms or more, go to next step. If resistance is less than 10,000 ohms, go to step 294).
79. 292) Check Circuit Resistance Turn ignition off. Disconnect distributor connector. Measure resistance between PIP jack of ignition analyzer and PIP terminal of distributor connector. If resistance is 5 ohms or more, repair circuit and retest. If resistance is less than 5 ohms, go to next step.
80. 293) Wiggle Test Mode B Turn ignition off. Reconnect distributor connector. Turn ignition on. Turn WIGGLE TEST switch on. Set MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
81. 294) Wiggle Test Mode A Leave ignition on. Set MODE switch to "A". Press RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
82. 295) Wiggle Test Mode C Leave ignition on. Set MODE switch to "C". Press RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
83. 296) Wiggle Test ROVING Turn ignition off. Using jumper wire, connect ROVING jack and PIP jack of intermittent ignition analyzer. Turn ignition on. Set MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
84. 297) Wiggle Test ROVING At PCM Turn ignition off. Install EEC-V Breakout Box (014-00950) leaving PCM disconnected. Using jumper wire, connect ROVING jack of intermittent ignition analyzer to test pin No. 49 at the breakout box. Turn ignition on. Press RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
85. 298) PIP Sensor Check Turn ignition off. Remove distributor cap. Inspect PIP sensor and pulse wheel for damage, correct mounting and alignment. Service sensor and data wheel as necessary. If no problems are found, go to next step.
86. 299) Check For Short Turn ignition off. Disconnect PCM. Measure resistance between IGN GND jack and PIP jack of ignition analyzer. Measure resistance between ICM PWR jack and PIP jack of ignition analyzer. If both resistance measurements are 10,000 ohms or more, replace PCM. If either resistance measurement is less than 10,000 ohms, go to next step.
87. 300) Leave ignition off. Disconnect ICM. Measure resistance between IGN GND jack and PIP jack of ignition analyzer. Measure resistance between ICM PWR jack and PIP jack of ignition analyzer. If both resistance measurements are 10,000 ohms or more, replace ICM. If either resistance measurement is less than 10,000 ohms, go to next step.
88. 301) Leave ignition off. Disconnect distributor harness connector. Measure resistance between IGN GND jack and PIP jack of ignition analyzer. Measure resistance between ICM PWR jack and PIP jack of ignition analyzer. If both resistance measurements are 10,000 ohms or more, repair or replace PIP sensor harness. If either resistance measurement is less than 10,000 ohms, go to next step.
89. 302) Check Base Timing Status If BASE TIMING LED is on continuously with no FAULT MEMORY LEDs, replace ICM. If LEDs are not as specified, go to next step.
90. 303) Turn ignition off. Measure resistance between IGN GND jack and SPOUT jack of ignition analyzer. Measure resistance between ICM PWR jack and SPOUT jack of ignition analyzer. If both resistance measurements are 10,000 ohms or more, go to next step. If either resistance measurement is less than 10,000 ohms, go to step 310).
91. 304) Check SPOUT Circuit Resistance Turn ignition off. Disconnect PCM. Measure resistance between SPOUT jack of ignition analyzer and test pin No. 50 at the breakout box. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair circuit and retest.
92. 304) Check PIP Circuit Resistance Leave ignition off. Measure resistance between PIP jack of ignition analyzer and test pin No. 50 at the breakout box. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair circuit and retest.
93. 306) Check IGN GND Circuit Resistance Leave ignition off. Measure resistance between IGN GND jack of ignition analyzer and test pin No. 23 at the breakout box. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair circuit and retest.
94. 307) Wiggle Test Mode B With ignition off, reconnect PCM. Turn ignition on. Turn WIGGLE TEST switch on. Set MODE switch to "B". Press RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
95. 308) Wiggle Test Mode C Leave ignition on. Set MODE switch to "C". Press RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, go to next step. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
96. 309) Wiggle Test ROVING At PCM Turn ignition off. Install EEC-V Breakout Box (014-00950) leaving PCM disconnected. Using jumper wire, connect ROVING jack of intermittent ignition analyzer to test pin No. 36 at the breakout box. Turn ignition on. Press RESET button and wait 5 seconds for initialization. If all fault memory LEDs are off, replace PCM. If any fault memory LEDs are on, press RESET button and continue to test until intermittent is located.
97. 310) Check Harness & PCM For Shorts Turn ignition off. Disconnect ICM. Measure resistance between IGN GND jack and SPOUT jack of ignition analyzer. Measure resistance between ICM PWR jack and SPOUT jack of ignition analyzer. If both resistance measurements are 10,000 ohms or more, replace ICM and retest. If either resistance measurement is less than 10,000 ohms, go to step 310).
98. 311) Check Harness & PCM For Shorts Turn ignition off. Disconnect PCM. Measure resistance between IGN GND jack and SPOUT jack of ignition analyzer. Measure resistance between ICM PWR jack and SPOUT jack of ignition analyzer. If both resistance measurements are 10,000 ohms or more, replace PCM and retest. If either resistance measurement is less than 10,000 ohms, repair or replace harness and retest.
99. 312) Check ICM GND Turn ignition off. Measure resistance between negative battery terminal and IGN GND jack of ignition analyzer. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, go to step 315).
100. 313) Check ICM PWR Turn ignition on. Measure voltage between negative battery terminal and IGN PWR jack of ignition analyzer. If voltage is 6 volts or more, go to next step. If voltage is less than 6 volts, repair ICM PWR circuit and retest.
101. 314) Turn ignition off. Connect jumper wire between negative battery terminal and IGN GND jack of ignition analyzer. Turn ignition on. Press RESET button and wait 5 seconds for initialization. If ignition analyzer resets, repair ICM PWR circuit and retest. If ignition analyzer does not reset, repair IGN GND circuit and retest.
102. 315) Check Circuit Resistance Turn ignition off. Disconnect distributor connector. Measure resistance between IGN GND jack of ignition analyzer and IGN GND terminal of distributor connector. If resistance is 5 ohms or more, repair circuit and retest. If resistance is less than 10,000 ohms, go to next step.
103. 316) Check Distributor Ground Leave ignition off. Measure resistance between negative battery terminal and metal surface of distributor. If resistance is 5 ohms or more, check distributor for correct mounting, negative battery cable ground connection and distributor ground circuit. If resistance is less than 5 ohms, service or replace PIP sensor or harness.