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Diagnosis - CD4E Automatic Transmission: Diagnosis Mazda 626 GF

Automatic Trans 6 illustrations ~8935 words

Diagnostic Formats

QUICK TEST and SYSTEM TESTS are diagnostic formats used to test and service EEC-V system. QUICK TEST allows technician to identify problems and retrieve Diagnostic Trouble Codes (DTCs). SYSTEM TESTS check circuits, sensors and actuators.

Before starting any SYSTEM TEST, follow all steps under QUICK TEST to determine correct SYSTEM TEST. If vehicle passes QUICK TEST and no driveability symptoms or intermittent faults exist, EEC-V system is okay.

Diagnostic Trouble Codes (DTCs)

During QUICK TEST, 3 types of diagnostic trouble codes are retrieved: KOEO, KOER and Continuous Memory codes. See QUICK TEST for self-test procedures. Codes may be cleared from PCM memory after they have been recorded or repaired. See CLEARING CODES .

VISUAL INSPECTION

Visually inspect all electrical wiring, looking for chafed, stretched, cut or pinched wiring. Check for non-factory installed equipment wired into transaxle or PCM harness. Ensure electrical connectors fit tightly and are not corroded. Ensure vacuum hoses are properly routed and are not pinched or cut. Inspect air induction system for possible vacuum leaks. Check PCM, sensors and actuators for physical damage. Check engine coolant level. Check transaxle fluid level and condition.

Note. Only transaxle related trouble codes are listed. For engine related DTC definitions, see TROUBLE CODE DEFINITIONS article in APPLICATIONS & IDENTIFICATION. For engine related DTC diagnosis, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. These DTCs pertain to engine performance and must be repaired first, as engine performance and related component signals will affect transaxle operation and diagnosis.

SYMPTOM TESTS

Note. Symptoms listed are for electronic diagnosis only. Some symptoms are not listed and may be found in mechanical symptom diagnosis. See SYMPTOM DIAGNOSIS in FORD CD4E (MAZDA LA4A-EL) OVERHAUL article.

DIAGNOSIS & TESTING

Note. In addition to transaxle fault codes, engine related fault codes may be output during QUICK TEST procedure. These fault codes pertain to engine performance and must be repaired first as engine performance will greatly affect transaxle operation. For information and testing procedures of engine related fault codes and components, see SELF-DIAGNOSTICS - EEC-V article in ENGINE PERFORMANCE.

DIAGNOSTIC PROCEDURE

Note. If no Diagnostic Trouble Code (DTC) is present but driveability problem still exists, proceed to FORD CD4E (MAZDA LA4A-EL) OVERHAUL article for symptom diagnosis procedures.

  1. Perform «QUICK TEST»(ref-129633-S17898111942001111500000) and record all DTCs. If no DTCs are set, go to step 5 . If any engine related DTCs are set, repair them first. See SELF-DIAGNOSTICS - EEC-V article in ENGINE PERFORMANCE. If no Continuous Memory codes were set, go to step 5 .
  2. If any DTCs set in previous step were continuous codes, clear all codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000) . Perform «TRANSMISSION DRIVE CYCLE TEST»(ref-129633-S17322089752001111500000) . If Continuous Memory codes are set during drive cycle, go to next step. If Continuous Memory codes are not set during drive cycle, go to step 5 .
  3. Perform SYSTEM test corresponding to code set. See «DTC IDENTIFICATION»(ref-129633-S11336697102001111500000) table. If problem is not corrected, go to next step. If problem is corrected, go to step 6 .
  4. Follow SYSTEM tests corresponding to electronic trouble symptom. Perform static and drive tests. Use manufacturer provided transmission tester overlay to perform static tests. If drive tests do not correct problem, go to next step. If drive tests correct problem, check for intermittent code. Check transaxle circuit wiring harnesses and connectors for damage or poor connection.
  5. Diagnose problem by mechanical symptom. See SYMPTOM DIAGNOSIS in FORD CD4E (MAZDA LA4A-EL) OVERHAUL article. Perform any recommended overhaul procedures. Perform «TRANSMISSION DRIVE CYCLE TEST»(ref-129633-S17322089752001111500000) .
  6. Perform «QUICK TEST»(ref-129633-S17898111942001111500000) and ensure no DTCs and no mechanical problems exist. If any DTCs exist, go to step 1 . If no DTCs exist, clear memory code. See «CLEARING CODES»(ref-129633-S11554415332001111500000) .

KOEO Self-Test

Ensure engine is at normal operating temperature. If engine does not start (or stalls after starting), continue KOEO SELF-TEST. Turn ignition switch to OFF position. Ensure test equipment is properly attached. Program scan tool using the following steps

  1. Select vehicle and engine selection menu.
  2. Select year, engine, model and any additional information requested by scan tool.
  3. Select DIAGNOSTIC DATA LINK.
  4. Select PCM - POWERTRAIN CTRL MODULE.
  5. Select DIAGNOSTIC TEST MODE.
  6. Select KOEO ON-DEMAND SELF-TEST.
  7. Turn ignition on.
  8. Follow operating instructions from scan tool menu.

KOER Self-Test

Ensure engine is at normal operating temperature. Turn ignition switch to OFF position. Ensure test equipment is properly attached. Program scan tool using the following steps

  1. Select vehicle and engine selection menu.
  2. Select year, engine, model and any additional information requested by scan tool.
  3. Select DIAGNOSTIC DATA LINK.
  4. Select PCM - POWERTRAIN CTRL MODULE.
  5. Select DIAGNOSTIC TEST MODE.
  6. Select KOER ON-DEMAND SELF-TEST.
  7. Start engine and allow to idle.
  8. Follow operating instructions from scan tool menu.
  9. Perform BPP and TCS cycling (if equipped).

Continuous Memory Self-Test

Turn ignition switch to OFF position. Ensure test equipment is properly attached. Program scan tool using the following steps

  1. Select vehicle and engine selection menu.
  2. Select year, engine, model and any additional information requested by scan tool.
  3. Select DIAGNOSTIC DATA LINK.
  4. Select PCM - POWERTRAIN CTRL MODULE.
  5. Select DIAGNOSTIC TEST MODES.
  6. Select RETRIEVE/CLEAR CONTINUOUS DTCs.
  7. Turn ignition on.
  8. Follow operating instructions from scan tool menu.

KOEO & KOER Self-Test Codes

Record codes in order received. These codes indicate current faults in system and should be serviced in order of appearance. Use DTC IDENTIFICATION to identify correct CIRCUIT TEST and SYSTEM TEST to perform.

Note. If self-test will not activate or TOOL COMMUNICATION ERROR is received, see SCAN TOOL UNABLE TO COMMUNICATE .

Diagnostic Aids

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

  1. Standard Corporate Protocol (SCP) communication circuits BUS (+) and BUS (-).
  2. Wiring harness circuits (CHASSIS GROUND, PWR GND and VBAT). (Scheme 208)
  3. Faulty Powertrain Control Module (PCM).

Scheme 208

Scheme 208
Scheme 208
  1. Verify Self-Test Procedure Is Correct This DTC indicates «KOEO SELF-TEST»(ref-129633-S42308861042001111500000) cannot be completed. Ensure scan tool is correctly attached to DLC, located under dash panel. Ensure scan tool is not damaged or defective. Verify correct procedure was used to activate «CONTINUOUS MEMORY SELF-TEST»(ref-129633-S31205233642001111500000), «KOEO SELF-TEST»(ref-129633-S42308861042001111500000) or «KOER SELF-TEST»(ref-129633-S18785389272001111500000). Correct as necessary. If no faults are found, go to next step.
  2. Ability To Access Continuous Memory DTCs If Continuous Memory DTCs are accessible, go to next step. If Continuous Memory DTCs are not accessible, go to step 6.
  3. Ability To Activate KOEO Self-Test If KOEO self-test can be activated, go to next step. If KOEO self-test cannot be activated, go to step 5.
  4. Ability To Activate KOER Self-Test If KOER self-test can be activated, DTC is false. Obtain PCM part number and check manufacturer for correct PCM application. If KOER self-test cannot be activated, go to next step.
  5. Retrieve Any Continuous Memory DTCs Perform «CONTINUOUS MEMORY SELF-TEST»(ref-129633-S31205233642001111500000) in QUICK TEST. If any Continuous Memory DTCs are present, service DTCs as necessary before continuing. If unable to retrieve any Continuous Memory DTCs, go to next step.
  6. Check Voltage To Data Link Connector (DLC) Inspect DLC for damage and repair as necessary. Turn ignition on. Measure voltage between terminal No. 16 (B+) at DLC and engine ground. (Scheme 208) If voltage is more than 10.5 volts, go to next step. If voltage is 10.5 volts or less, repair open in B+ circuit.
  7. Check DLC Ground Circuit Continuity Turn ignition off. Measure resistance between terminal No. 4 (CHASSIS GROUND) at DLC and chassis ground. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in CHASSIS GROUND circuit.
  8. Check DLC PWR GND Circuit Continuity Turn ignition off. Measure resistance between terminal No. 5 (PWR GND) at DLC and negative battery terminal. 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.
  9. Perform Data Link Diagnostic Network Test Turn ignition on. Using scan tool, perform DATA LINK DIAGNOSTICS. If PCM: NO RESPONSE/NOT EQUIPPED, PCM: NO RESPONSE CKT 914 (BUS-) or PCM: NO RESPONSE CKT 915 (BUS+) message is displayed, go to next step. If none of the specified messages are displayed, no problem is indicated at this time. Repeat «QUICK TEST»(ref-129633-S17898111942001111500000).
  10. Check Network Test Results If scan tool displayed CKT 914=ALL MODULE NO RESP/NOT EQUIP or CKT 915=ALL MODULE NO RESP/NOT EQUIP message after performing DATA LINK DIAGNOSTICS test, proceed as follows: If only CKT 914=ALL MODULE NO RESP/NOT EQUIP message is displayed, go to step 11. If only CKT 915=ALL MODULE NO RESP/NOT EQUIP message is displayed, go to step 14. If both CKT 914=ALL MODULE NO RESP/NOT EQUIP and CKT 915=ALL MODULE NO RESP/NOT EQUIP messages are displayed, repair open to BUS+ and BUS- circuits or repair short between BUS+ and BUS- circuits and all associated modules If scan tool did not display CKT 914=ALL MODULE NO RESP/NOT EQUIP or CKT 915=ALL MODULE NO RESP/NOT EQUIP message after performing DATA LINK DIAGNOSTICS test, proceed as follows: If CKT 914=SOME MODULE NO RESP/NOT EQUIP or PCM: NO RESPONSE ON CKT 914 (BUS+) message is displayed, go to step 13. If CKT 915=SOME MODULE NO RESP/NOT EQUIP or PCM: NO RESPONSE ON CKT 915 (BUS-) message is displayed, go to step 16.
  11. Check BUS(+) Circuit For Short To Ground Turn ignition off. Disconnect PCM 104-pin connector. Inspect connector for loose, damaged or corroded terminals. Repair as necessary. Measure resistance between chassis ground and PCM connector pin No. 16 (BUS+). If resistance is more than 50 ohms, go to next step. If resistance is 50 ohms or less, a short to ground in BUS(+) circuit or associated modules exists. See appropriate MODULE COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT.
  12. Check BUS(+) Circuit For Short To Power Turn ignition on. Measure voltage between PCM connector pin No. 16 (BUS+) and chassis ground. If voltage is one volt or less, go to next step. If voltage is more than one volt, a short to power in BUS(+) circuit or associated modules exists. See appropriate MODULE COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT.
  13. Check BUS(+) Circuit Continuity Turn ignition off. Measure resistance of BUS(+) circuit between PCM connector pin No. 16 and terminal No. 2 at DLC. (Scheme 208) 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.
  14. Check For Short To Ground Ensure PCM is disconnected. Measure resistance between PCM connector pin No. 15 and chassis ground. If resistance is more than 50 ohms, go to next step. If resistance is 50 ohms or less, a short to ground in BUS(-) circuit or associated modules exists. See appropriate MODULE COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT.
  15. Check For Short To Power Turn ignition on. Measure voltage between PCM connector pin No. 15 and chassis ground. If voltage is 6 volts or less, go to next step. If voltage is more than 6 volts, repair a short to power in BUS(-) circuit or associated modules exists. See appropriate MODULE COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT.
  16. Check BUS(-) Circuit Turn ignition off. Measure resistance of BUS(-) circuit between PCM connector pin No. 15 and terminal No. 10 at DLC. If resistance is less than 5 ohms, replace PCM. If resistance is 5 ohms or more, repair open in BUS(-) circuit to DLC.

Output Test Mode

This mode allows a technician to energize and de-energize most of the system output actuators on command. After accessing OUTPUT TEST MODE, outputs and cooling fans can be turned on and off separately. To access OUTPUT TEST MODE, turn ignition switch to OFF position. Ensure test equipment is properly attached. Program scan tool using the following steps

  1. Select vehicle and engine selection menu.
  2. Select year, engine, model and any additional information requested by scan tool.
  3. Follow operating instructions from scan tool menu.
  4. Select DIAGNOSTIC DATA LINK.
  5. Select PCM - POWERTRAIN CTRL MODULE.
  6. Select DIAGNOSTIC TEST MODE.
  7. Select ACTIVE TESTS.
  8. Select OUTPUT CONTROL.
  9. Turn ignition on.
  10. Follow operating instructions from scan tool menu.

TRANSMISSION DRIVE CYCLE TEST

Note. The transmission drive cycle test must be followed exactly. Malfunctions have to occur 4 times consecutively for continuous codes P0731, P0732, P0733 and P0734 to set, and 5 times consecutively for continuous codes P0741 and P1741 to set.

  1. After repairing any engine performance trouble codes, erase remaining transaxle codes. Warm engine to normal operating temperature. Ensure transaxle fluid level is correct. Shift transaxle to "D" position. Press TCS on shifter handle. O/D OFF light should illuminate.
  2. Accelerate from stop to 40 MPH. Hold speed for at least 15 seconds (30 seconds above 4000 ft.). Press TCS and accelerate to 50 MPH. Hold speed for at least 15 seconds (30 seconds above 4000 ft.). While maintaining speed with transaxle in 4th gear, lightly depress brake pedal and release (to operate brake lights). Hold speed for at least an additional 5 seconds. Bring vehicle to stop for at least 20 seconds with transaxle in "D" position. Repeat steps 1) and 2) at least 5 times. Perform «QUICK TEST»(ref-129633-S17898111942001111500000) and record continuous codes.

Transmission Tester Removal & Clearing Trouble Codes

Disconnect Transmission Tester from transaxle connector. Install vehicle wiring harness to transaxle connector. Install all heat shields that were removed. Disconnect tester power lead from vehicle. See CLEARING CODES to erase any trouble codes that were set. Run QUICK TEST to determine if any trouble codes are present.

TEST B: TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR

  1. Electronic Diagnostics Check transaxle harness connector. Inspect connector for damaged pins, corrosion and loose wires. Ensure transaxle connector is fully seated. Repair as necessary. Go to next step.
  2. Check Electrical Signal Operation Ensure ignition is off. Disconnect transaxle harness connector. Using DVOM, connect positive lead to transaxle harness connector terminal No. 3 and negative lead to terminal No. 2. see scheme 7 Turn ignition on. If voltage is 4.75-5.25 volts, go to step 5. If voltage is not within specification, go to next step.
  3. Check Continuity Of TFT Signal Return (SIG RTN) Circuits Turn ignition off. Disconnect PCM 104-pin connector, and inspect it for damaged pins, corrosion and loose wires. Repair as necessary. Install breakout box, leaving PCM disconnected. Measure and record resistance between breakout box test pin No. 37 and transaxle harness connector terminal No. 3. see scheme 7 Measure and record resistance between test pin No. 91 and transaxle harness connector terminal No. 2. If each resistance is less than 5 ohms, go to next step. If any resistance is more than 5 ohms, repair open circuit. Connect all components. Erase trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000).
  4. Check TFT Circuit For Short To VPWR & Ground Ensure ignition is off. Disconnect PCM 104-pin connector, and inspect it for damaged pins, corrosion and loose wires. Repair as necessary. Install breakout box, leaving PCM disconnected. Measure and record resistance between breakout box test pin No. 37 and test pins No. 71 and 97. Measure and record resistance between test pins No. 77, 91 and 103, and test pin No. 37. If any resistance is less than 10 k/ohms, repair short circuit. Disconnect breakout box and repeat «QUICK TEST»(ref-129633-S17898111942001111500000). If resistance is 10 k/ohms or more, go to next step.
  5. Check Resistance Of TFT Sensor/Harness Install transmission tester. Set tester Bench/Drive switch to BENCH position. Set Solenoid Selector switch to OHMS CHECK. Connect ohmmeter leads to appropriate TFT jacks. Measure and record resistance. Resistance should be within specification. See «TFT TEMPERATURE/RESISTANCE»(ref-129633-S33904983972001111500000) table. If resistance is within specification for specific temperature, either warm up transaxle or allow transaxle to cool to check resistance at different temperatures. If resistances measured remain within specification, go to next step. If resistances measured are not within specification, replace solenoid body assembly. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000). TFT TEMPERATURE/RESISTANCE Temperature °F (°C) Resistance (k/Ohms) 32-68 (0-20) 41-84 69-104 (21-40) 14-41 105-158 (41-70) 5.9-14 159-194 (71-90) 3.1-5.9 195-230 (91-110) 1.7-3.1 231-266 (111-130) 1.0-1.7 267-302 (131-150).6-1.0
  6. Check TFT Sensor For Short To Ground Check continuity between BAT (-) tester jack and TFT jacks. If continuity exists, replace solenoid body assembly. Erase all trouble codes. See See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000). If continuity does not exist, Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000). See TROUBLE SHOOTING in FORD CD4E (MAZDA LA4A-EL) OVERHAUL article for non-electronic symptom diagnostics.

TEST D: TRANSMISSION RANGE (TR) SENSOR

  1. Electronic Diagnostics Disconnect TR connector, and inspect it for damaged pins, corrosion and loose wires. Repair as necessary. Reconnect TR sensor connector. Ensure TR sensor is correctly adjusted. See appropriate AUTOMATIC TRANSMISSION SERVICING article in TRANSMISSION SERVICING. If sensor requires adjustment, clear trouble codes after adjustment. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000). If sensor is correctly adjusted, go to next step.
  2. Check Electrical Signal Operation Ensure ignition is off. Disconnect TR sensor harness connector. Turn ignition on. Measure voltage between harness connector terminals No. 5 and 10. See «TR SENSOR WIRE COLOR IDENTIFICATION»(ref-129633-S35158278202001111500000) table. If voltage is 4.75-5.25 volts, go to next step. If voltage is not within specification, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE to diagnose no reference voltage. TR SENSOR WIRE COLOR IDENTIFICATION Terminal No. Wire Color 5 Brown/Green 10 White/Green
  3. Check Continuity Of TR Sensor Harness Circuits Turn ignition off. Disconnect PCM 104-pin connector, and inspect it for damaged pins, corrosion and loose wires. Repair as necessary. Install breakout box, leaving PCM disconnected. Measure and record resistance between breakout box test pin terminal No. 91 and TR sensor harness connector terminal No. 5. Measure and record resistance between breakout box test pin terminal No. 64 and TR sensor harness connector terminal No. 10. See «TR SENSOR WIRE COLOR IDENTIFICATION»(ref-129633-S35158278202001111500000) table. If each resistance measurement is less than 5 ohms, go to next step. If any resistance measurement is more than 5 ohms, repair open circuit. Remove breakout box and connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000).
  4. Check TR Circuit For Shorts To Power & Ground Measure resistance between breakout box test pin No. 64 and test pins No. 24, 71, 77, 91, 97 and 103. Measure resistance between breakout box test pin No. 64 and ground. If each resistance measurement is more than 10 k/ohms, go to next step. If any resistance measurement is less than 10 k/ohms, repair short circuit. Remove breakout box and connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000).
  5. Check TR Sensor Resistance Install TR sensor overlay on transmission tester. Connect tester to TR sensor. Check continuity and resistances in all positions. (Scheme 209) If TR sensor does not operate within specification, replace sensor. Connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000). If sensor operates within specification, replace PCM. Connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000).
  6. Check Park/Neutral Circuits Monitor transmission tester indicator lights while moving gear shift lever through all positions. If indicator light display matches gear shift lever position, go to next step. If indicator light display does not match gear shift lever position, replace TR sensor. Connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000).
  7. Check Reverse/Back-Up Light Circuits Monitor transmission tester indicator light while moving gear shift lever to Reverse position. Verify if back-up lights are illuminated. If indicator light display matches gear shift lever position and back-up lights operate correctly, system is currently operating correctly. If indicator light display does not match gear shift lever position and/or back-up lights are not illuminated, replace TR sensor. Connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000).

Scheme 209

Scheme 209
Scheme 209

TEST E: ELECTRONIC PRESSURE CONTROL (EPC) SOLENOID

  1. Electronic Diagnostics Ensure transaxle harness connector is in acceptable condition. Repair as necessary. Ensure transaxle harness connector is fully seated. Connect NGS tester or equivalent to DLC. Perform KOEO test until Continuous Memory Code(s) have been displayed. See «QUICK TEST»(ref-129633-S17898111942001111500000). Enter output test mode. See «ADDITIONAL SYSTEM FUNCTIONS»(ref-129633-S19547804582001111500000). Select ALL ON mode. Push START to turn outputs ON. Push STOP to outputs OFF. If vehicle enters output state, go to next step. If vehicle will not enter output state, see See «SCAN TOOL UNABLE TO COMMUNICATE»(ref-129633-S28357830972000020900000).
  2. Check Electrical Signal Operation Turn ignition off. Disconnect transaxle harness connector. Inspect condition of connector and repair as needed. Turn ignition on. Using DVOM, connect positive lead to transaxle harness connector terminal No. 8 and negative lead to terminal No. 9. see scheme 7 While monitoring DVOM, press START and STOP to cycle solenoid output on and off. If voltage changes at least.5 volt, go to step 5. If voltage is unaffected, go to next step.
  3. Check Continuity Of Solenoid Signal & VPWR Harness Circuits Ensure ignition is off. Disconnect PCM 104-pin connector, and inspect it for damaged pins, corrosion and loose wires. Repair as necessary. Install breakout box, leaving PCM disconnected. Measure and record resistance between test pins No. 71 and 97 and transaxle harness connector terminal No. 9. Measure and record resistance between test pin No. 81 and transaxle harness connector terminal No. 8. If any resistance is greater than 5 ohms, repair open circuit. Connect all components. Disconnect breakout box and repeat «QUICK TEST»(ref-129633-S17898111942001111500000). If each resistance is 5 ohms or less, go to next step.
  4. Check Solenoid Harness For Shorts To Power & Ground Measure and record resistance between breakout box test pin No. 81, and test pins No. 71 and 97. Measure and record resistance between chassis ground and test pin No. 81 and between test pins No. 24, 51, 77, 91 and 103. If any resistance is less than 10 k/ohms, repair short circuit. Connect all components. Disconnect breakout box and repeat «QUICK TEST»(ref-129633-S17898111942001111500000). If each resistance is 10 k/ohms or more, go to next step.
  5. EPC Functional Test Connect PCM 104-pin connector. Disconnect transaxle harness connector. Connect transaxle tester. Connect line pressure gauge. See FORD CD4E (MAZDA LA4A-EL) OVERHAUL article. Set Bench/Drive switch to DRIVE position. Set Gear Selector switch to "1" position. Perform EPC function test. See tester instructions. Observe line pressure on gauge while depressing EPC switch with KOER. EPC solenoid should activate (Green LED) and line pressure should drop when EPC switch is depressed. If solenoid operates correctly, replace PCM. Connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000). If solenoid is not operating, go to next step.
  6. Check Resistance Of Solenoid Ensure tester power is off. Connect ohmmeter to EPC jacks. If resistance is 3.75-5.92 ohms, go to next step. If resistance is not within specifications, replace solenoid body assembly. See FORD CD4E (MAZDA LA4A-EL) OVERHAUL article. Connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000).
  7. Check Solenoid For Short To Ground Check continuity between BAT(-) jack of transmission tester and EPC jacks. If continuity exists, replace solenoid body assembly. See FORD CD4E (MAZDA LA4A-EL) OVERHAUL article. Connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000). If continuity does not exist, see TROUBLE SHOOTING in FORD CD4E (MAZDA LA4A-EL) OVERHAUL article.

TEST F: TURBINE SHAFT SPEED (TSS) SENSOR

  1. Electronic Diagnostics Inspect condition of TSS sensor harness and component connector. Repair as needed.
  2. Check Continuity Of TSS Sensor Harness Circuit Ensure ignition is off. Disconnect PCM 104-pin connector, and inspect it for damaged pins, corrosion and loose wires. Repair as necessary. Install breakout box, leaving PCM disconnected. Disconnect TSS sensor harness connector. Measure and record resistance between breakout box test pin No. 84 and TSS sensor harness connector positive terminal (White/Violet wire). Measure and record resistance between breakout box test pin No. 76 and TSS sensor harness connector negative terminal (Brown/White wire). If each resistance measurement is 5 ohms or less, go to next step. If either resistance measurement is more than 5 ohms, repair open circuit. Connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000) . Repeat «QUICK TEST»(ref-129633-S17898111942001111500000) .
  3. Check TSS Sensor Circuit For Short To Power & Ground Measure and record resistance between test pins No. 76 and 84, and test pins No. 71 and 97. Measure and record resistance between test pins No. 24, 51, 76, 77 and 103, and test pin No. 84. If any resistance measured is less than 10 k/ohms, repair short circuit. Connect all components. Disconnect breakout box and repeat «QUICK TEST»(ref-129633-S17898111942001111500000) . If each resistance is 10 k/ohms or more, go to next step.
  4. TSS Sensor Functional Test Connect PCM 104-pin connector. Ensure TSS sensor harness connector is disconnected. Connect transmission tester to TSS sensor component connector. Connect voltmeter leads to appropriate tester TSS sensor jacks. Set voltmeter to 20-volt AC scale. Perform drive cycle test. See «TRANSMISSION DRIVE CYCLE TEST»(ref-129633-S17322089752001111500000) . If voltage increases with vehicle speed, replace PCM. Connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000) . Repeat «QUICK TEST»(ref-129633-S17898111942001111500000) . If voltage does not increase with speed, go to next step.
  5. Check Resistance Of TSS Sensor Connect ohmmeter leads to appropriate transmission tester TSS sensor jacks. If resistance is 140-290 ohms, go to next step. If resistance is not within specification, replace TSS sensor. Repeat previous step.
  6. Check TSS Sensor For Short To Ground Check for continuity between transmission tester TSS sensor jacks and tester BAT(-) jack. If continuity does not exist, go to next step. If continuity exists, replace TSS sensor. Repeat step 4 .
  7. Check TSS Sensor Magnetism Remove TSS sensor from transaxle. See FORD CD4E (MAZDA LA4A-EL) OVERHAUL article. Determine if TSS sensor is magnetically attracted to ferrous metal. If TSS sensor acts like a magnet, go to next step. If TSS sensor does not stick to ferrous metal surface, replace TSS sensor. Repeat step 4 .
  8. Check Exciter Wheel With TSS sensor removed, inspect condition of exciter wheel. Rotate engine with remote starter switch and ensure all 4 teeth of exciter wheel are not damaged. Replace exciter wheel if any teeth are damaged. See FORD CD4E (MAZDA LA4A-EL) OVERHAUL article. If exciter wheel is not damaged, replace TSS sensor. Repeat step 4 .

TEST G: 3-2T/CCS SOLENOID

  1. Electronic Diagnostics Ensure transaxle harness connector is in acceptable condition. Repair as necessary. Ensure transaxle harness connector is fully seated. Connect NGS tester or equivalent to DLC. Perform KOEO test until Continuous Memory trouble code(s) have been displayed. See «QUICK TEST»(ref-129633-S17898111942001111500000). Enter output test mode. See «ADDITIONAL SYSTEM FUNCTIONS»(ref-129633-S19547804582001111500000). Select ALL ON mode. Push START to turn outputs ON. Push STOP to turn outputs OFF. If vehicle enters output state, go to next step. If vehicle will not enter output state, see «SCAN TOOL UNABLE TO COMMUNICATE»(ref-129633-S28357830972000020900000)
  2. Check Electrical Signal Operation Turn ignition off. Disconnect transaxle harness connector. Inspect condition of connector and repair as needed. Turn ignition on. Using DVOM, connect positive lead to transaxle harness connector terminal No. 5 and negative lead to terminal No. 10. see scheme 7 While monitoring DVOM, press START and STOP to cycle solenoid output on and off. If voltage changes at least.5 volt, go to step 5. If voltage is unaffected, go to next step.
  3. Check Continuity Of Solenoid Signal & VPWR Harness Circuit Turn ignition off, and wait 10 seconds. Disconnect PCM 104-pin connector, and inspect it for damaged pins, corrosion and loose wires. Repair as necessary. Install breakout box, leaving PCM disconnected. Measure and record resistance between breakout box test pins No. 71 and 97, and transaxle harness connector terminal No. 5. see scheme 7 Measure and record resistance between breakout box test pins No. 102, and transaxle harness connector terminal No. 10. If each resistance is 5 ohms or less, go to next step. If any resistance is more than 5 ohms, repair open circuit. Connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000).
  4. Check Harness For Short To Power Or Ground Measure and record resistance between test pin No. 102 and test pins No. 71 and 97. Measure and record resistance between test pin No. 102 and test pins No. 24, 51, 77, 91 and 103. If any resistance is less than 10 k/ohms, repair short circuit. Disconnect breakout box and repeat «QUICK TEST»(ref-129633-S17898111942001111500000). If each resistance is 10 k/ohms or more, go to next step.
  5. 3-2T/CCS Functional Test Connect PCM 104-pin connector. Disconnect transaxle harness connector. Connect transaxle tester. Set Bench/Drive switch to DRIVE position. Set Gear Selector switch to "1" position. Perform 3-2T/CCS function test. See tester instructions. 3-2T/CCS solenoid should engage (LED off) and engine braking should occur when switch is released. If solenoid operates correctly, replace PCM. Connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000). If solenoid is not operating, go to next step.
  6. Check Resistance Of Solenoid Ensure tester power is off. Connect ohmmeter to 3-2T/CCS jacks. If resistance is 3.75-5.92 ohms, go to next step. If resistance is not within specifications, replace solenoid body assembly. See FORD CD4E (MAZDA LA4A-EL) OVERHAUL article. Connect all components. Erase all trouble codes. Refer to «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000).
  7. Check Solenoid For Short To Ground Check continuity between BAT(-) jack of transmission tester and 3-2T/CCS jacks. If continuity exists, replace solenoid body assembly. See FORD CD4E (MAZDA LA4A-EL) OVERHAUL article. Connect all components. Erase all trouble codes. See «CLEARING CODES»(ref-129633-S11554415332001111500000). Repeat «QUICK TEST»(ref-129633-S17898111942001111500000). If continuity does not exist, see TROUBLE SHOOTING in FORD CD4E (MAZDA LA4A-EL) OVERHAUL article.

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

  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 (valves, timing, etc.).

Scheme 210

Scheme 210
Scheme 210
  1. Intermittent Test Procedure Proceed to the appropriate intermittent circuit test as follows: INPUT CIRCUIT TEST PRIORITY Circuit (1) Step 2 (2) Step 8 (3) Step 10 A/C ON 1st 3rd 2nd ACCS 1st 3rd 2nd ACD 1st 3rd 2nd ACP 1st 3rd 2nd BPP 1st N/A 2nd CASE GND 1st N/A 2nd CHT 1st 3rd 2nd CHTIL 1st N/A 2nd CHP+ (4) 1st 2nd 3rd CMP 1st 2nd 3rd CPP 1st N/A 2nd DPFEGR 1st 2nd 3rd EAIRM 1st 3rd 2nd ECT 1st 2nd 3rd ECT-A 1st 2nd 3rd ECT-B 1st 2nd 3rd FLI 1st 3rd 2nd FPM 1st N/A 2nd FRP 1st 2nd 3rd FSVM 1st N/A 2nd FTP 1st 3rd 2nd HO2S-11 1st 3rd 2nd HO2S-12 1st 3rd 2nd HO2S-21 1st 3rd 2nd HO2S-22 1st 3rd 2nd IAT 1st 2nd 3rd IMRCM 1st 3rd 2nd IMRCM-2 1st 3rd 2nd KS 1st 3rd 2nd MAF 1st 3rd 2nd OCT ADJ 1st 3rd 2nd PNP 1st N/A 2nd PSP 1st 3rd 2nd PTO 1st N/A 2nd TCS 1st N/A 2nd TP 1st 3rd 2nd VSS+ 1st 3rd 2nd 4X4L 1st 3rd 2nd (1) Input test (sensor) procedure. (2) Water soak check procedure. (3) Road test procedure. (4) Go to step 14 before performing WATER SOAK TEST. OUTPUT CIRCUIT TEST PRIORITY Circuit (1) Step 6 (2) Step 8 (3) Step 10 AIRB 1st 3rd 2nd AIRD 1st 3rd 2nd CD-1 (4) 1st 3rd 2nd CD-2 (4) 1st 3rd 2nd CD-3 (4) 1st 3rd 2nd CD-4 (4) 1st 3rd 2nd CD-5 1st N/A 2nd CD-6 1st N/A 2nd CD-7 1st N/A 2nd CD-8 1st N/A 2nd CD-9 1st N/A 2nd CD-10 1st N/A 2nd CTO 1st N/A 2nd DOL 1st N/A 2nd EAIR 1st 3rd 2nd EGRVR 1st 3rd 2nd EVAPCP 1st 3rd 2nd EVAPCV 1st 3rd 2nd EVAPPF 1st 3rd 2nd FC 1st 3rd 2nd FP 1st 3rd 2nd FSV 1st 3rd 2nd HFC 1st 3rd 2nd HTR-11 1st 3rd 2nd HTR-12 1st 3rd 2nd HTR-21 1st 3rd 2nd HTR-22 1st 3rd 2nd IAC 1st 3rd 2nd IMRC 1st 3rd 2nd IMT VALVE 1st 3rd 2nd INJ-1 1st 3rd 2nd INJ-2 1st 3rd 2nd INJ-3 1st 3rd 2nd INJ-4 1st 3rd 2nd INJ-5 1st 3rd 2nd INJ-6 1st 3rd 2nd INJ-7 1st 3rd 2nd INJ-8 1st 3rd 2nd INJ-9 1st 3rd 2nd INJ-10 1st 3rd 2nd LFC 1st 3rd 2nd LFP 1st 3rd 2nd MIL 1st N/A 2nd SIL 1st N/A 2nd TCIL 1st N/A 2nd VCT 1st 3rd 2nd WAC 1st 3rd 2nd (1) Output test procedure. (2) Water soak check procedure. (3) Road test procedure. (4) Go to step 14 before performing WATER SOAK TEST.
  2. Intermittent Input Test Procedure Turn ignition off. Connect scan tool to DLC. Using scan tool, select PIDs from the area of suspected wiring or component fault. Turn ignition on. If input is a switch-type component, turn switch on manually. While observing PID value, wiggle and pull on component wiring and connector. Lightly tap on component. If a fault is indicated, PID value will suddenly change. For correct PID values, see PIN VOLTAGE/PID VALUE CHARTS article in ENGINE PERFORMANCE. If no fault is indicated, go to next step. If a fault is indicated, check each related connector for loose, damaged or corroded terminals. Repair as necessary. If connector(s) is okay, replace suspect component. If replacement component does not repair fault, install original component and go to next step.
  3. Intermittent KOEO Harness Wiggle Test Leave ignition on with PIDs accessed. While observing PID value, wiggle and pull on wiring harness between suspect component and PCM. Lightly tap on suspect 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. Intermittent Input KOER Wiggle Test Leave ignition on with PIDs accessed. Access PIDs from area of suspect wiring or component fault. Start engine and allow to idle. While observing PID value, wiggle and pull on component wiring and connector. Lightly tap on suspect component. For correct PID values, see PIN VOLTAGE/PID VALUE CHARTS article in ENGINE PERFORMANCE. If no fault is indicated, go to next step. If a fault is indicated, check each related connector for loose, damaged or corroded terminals. Repair as necessary. If connector(s) is okay, replace suspect component. If replacement component does not repair fault, install original component and go to next step.
  5. Intermittent KOER Harness Wiggle Test 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.
  6. Intermittent Output Test Procedure If no symptoms or DTCs are present, perform road test procedure specified in steps 10 - 13. Turn ignition on. Using scan tool, select PIDs from area of suspect wiring or component fault. Record any Continuous Memory DTCs that are present. Turn ignition off. Disconnect 104-pin connector from PCM. Install Breakout Box (014-00959 ), leaving PCM disconnected. Connect positive lead of voltmeter to output control circuit of suspect component. (Scheme 210) Connect negative lead to ground. Turn ignition on. Using scan tool, enter OUTPUT TEST MODE. Activate suspect component. While observing voltmeter reading and PID value, lightly tap on component. If a fault is indicated, voltage reading will suddenly change. For correct PID values, see PIN VOLTAGE/PID VALUE CHARTS article in ENGINE PERFORMANCE. If voltage readings are correct and remain stable within one volt, go to next step. If readings are incorrect or unstable within one volt, replace suspect component. If replacement component does not repair fault, install original component and go to next step.
  7. Intermittent Output Wiggle Test Leave ignition on with PIDs accessed. While observing voltmeter reading and PID value, wiggle and pull on wiring harness (VPWR and control circuit) between suspect component and PCM. If voltage reading is correct and remains stable within one volt, fault cannot be identified with this procedure. Return to step 1 and choose another procedure. If voltage reading is incorrect or unstable within one volt, isolate fault and repair as necessary.
  8. Intermittent Water Soak Check Procedure Turn ignition off. Connect scan tool to DLC. Using scan tool, select PIDs from area of suspect wiring or component fault. Start engine and allow to idle. Spray water on suspect component, circuit and connector. Include any relays or relay modules associated with fault. 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 fault and repair as necessary.
  9. Intermittent Ignition Component Water Soak Test With engine running, spray water on spark plugs, spark plug wires, CKP sensor and CMP sensor. Watch for fault indicated by incorrect PID value, sudden change in PID value or fluctuating engine speed. For correct PID values, see PIN VOLTAGE/PID VALUE CHARTS article in ENGINE PERFORMANCE. If no faults occur, fault cannot be identified with this procedure. Return to step 1 and choose another procedure. If fault occurs, isolate fault and repair as necessary.
  10. Intermittent Road Test Procedure This procedure will monitor PIDs and components using a scan tool and breakout box 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 ENGINE PERFORMANCE. Turn ignition off. Using scan tool, select PIDs from area of suspect wiring or fault. Compare values to KOEO values given in PIN VOLTAGE/PID VALUE CHARTS article. Watch for fault indicated by PID value out of specification. If no faults occur, go to next step. If fault occurs, go to step 2 for input system fault or step 6 for output system fault.
  11. Intermittent Road Test For Hot Idle With scan tool 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 ENGINE PERFORMANCE. If values remain within specification, go to next step. If values do not remain within specification, go to step 2 for input system fault or step 6 for output system fault.
  12. Intermittent Road Test For Slow Cruise Leave scan tool 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 ENGINE PERFORMANCE. If PID values remain within specification, go to next step. If PID values do not remain within specification, go to step 2 for input system fault or step 6 for output system fault.
  13. Intermittent Road Test For High Cruise Leave scan tool 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 PIN VOLTAGE/PID VALUE CHARTS article in ENGINE PERFORMANCE. If PID values remain within specification, fault cannot be identified with this procedure. Return to step 1 and choose another procedure. If PID values do not remain within specification, go to step 2 for input system fault or step 6 for output system fault.
  14. Intermittent Ignition Test Procedure Ensure all accessories are off and battery is fully charged. Perform «QUICK TEST»(ref-129633-S17898111942001111500000). If DTCs are present, service as necessary before continuing. If no DTCs are present, connect Rotunda Distributorless Ignition System (DIS) Tester (007-00075 ) and go to next step. If intermittent ignition analyzer is not available, return to step 1 and choose another procedure.
  15. Perform Self-Test Turn ignition off. Ensure all accessories are off. Install correct overlay on front of tester panel. Install appropriate program cartridge in slot. Connect proper harness adapter to DIS Tester 104-Pin PCM Adapter (007-00110 ). Set rotary knob to position 1. Ensure WIGGLE TEST switch is off. Set System Type switch to Non Dual Plug position. Disconnect PCM 104-pin connector. Connect tester to PCM wiring harness connector. Turn ignition on. Press RESET button on tester. Tester will perform a self-test and all test LEDs will light and a beep will be heard. If CASE GND fault memory LED stays on, connect a jumper wire between PCM case to ground and continue with test. If tester performs self-test and VPWR LED turns on, go to step 20. If tester does not perform self-test or VPWR LED does not turn on, go to next step.
  16. DIS Tester Check Turn ignition off. Disconnect DIS tester. Connect jumper wire between VPWR jack at tester and positive battery terminal. Connect another jumper wire between PWR GND jack at tester and negative battery terminal. If tester performs self-test, go to step 20. If tester does not perform self-test, tester is not functioning properly. Replace tester and retest.
  17. Check For Open VPWR Circuit Turn ignition on. Measure voltage between VPWR jack at DIS tester and negative battery terminal. If voltage is more than 6 volts, go to next step. If voltage is 6 volts or less, repair open in VPWR circuit to PCM.
  18. Check PWR GND Circuit Turn ignition off. Measure resistance between PWR GND jack at tester and negative battery terminal. 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 PCM. Go to step 15.
  19. Wiggle Check Connect a jumper wire between PWR GND jack at tester and negative battery terminal. Turn ignition on. Set WIGGLE TEST switch on. Set MODE switch to "B" position. Wiggle and bend wiring harness and connectors. If tester resets, repair open in VPWR circuit to PCM. Go to step 15. If tester does not reset, repair open in PWR GND circuit to PCM. Go to step 15.
  20. Check For Coil Faults Turn ignition on. Press DIS tester RESET button. If COIL FAULT MEMORY LEDs are off, go to next step. If any COIL FAULT MEMORY LED is on or flashing, go to step 28.
  21. Check CASE GND/CKP SHIELD Leave 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 52.
  22. 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 42.
  23. Check For Coil Fault With tester connected to vehicle, test drive vehicle. If vehicle will not start, crank engine for 5-10 seconds. If COIL FAULT MEMORY LEDs are off with engine running or during engine cranking, go to next step. If any COIL FAULT MEMORY LED is on, go to step 28.
  24. CASE GND/CKP SHIELD Fault With tester connected to vehicle, test drive vehicle. If vehicle will not start, crank engine for 5-10 seconds. If CASE GND/CKP SHIELD FAULT MEMORY LED is off with engine running or during engine cranking, go to next step. If CASE GND/CKP SHIELD FAULT MEMORY LED is on, go to step 52.
  25. Check CKP Status With tester connected to vehicle, test drive vehicle. If vehicle will not start, crank engine for 5-10 seconds. If CKP SYSTEM STATUS SIGNAL LED is off with engine running or during engine cranking, go to next step. If CKP SYSTEM STATUS SIGNAL LED is on, go to step 46.
  26. Check For CTO Fault With tester connected to vehicle, test drive vehicle. If vehicle will not start, crank engine for 5-10 seconds. If CTO FAULT MEMORY LED is off with engine running or during engine cranking, go to next step. If CTO FAULT MEMORY LED is on, go to step 38.
  27. Check For CKP Signal With tester connected to vehicle, test drive vehicle. If vehicle will not start, crank engine for 5-10 seconds. If CKP SIGNAL SYSTEM STATUS LED is on with engine running or during engine cranking, no fault is indicated at this time. Ignition system is okay and testing is complete. If CKP SIGNAL SYSTEM STATUS LED is off, go to step 46.
  28. Check For Open IGN START/RUN Circuit Turn ignition off. Disconnect ignition coil pack(s). Turn ignition on. Measure voltage between IGN START/RUN terminal at ignition coil pack wiring harness connector and PWR GND jack at tester. If voltage is more than 10.5 volts, go to next step. If voltage is 10.5 volts or less, repair open in IGN START/RUN circuit to coil pack(s).
  29. Check For Short Turn ignition off. Measure resistance between PWR GND jack and each COIL jack at tester. Measure resistance between VPWR jack and each COIL terminal at tester. If all resistance readings are 6000 ohms or more, go to next step. If any resistance reading is less than 6000 ohms, go to step 35.
  30. Check COIL Circuit Resistance Turn ignition off. Measure resistance between each COIL jack at tester and same terminal at ignition coil wiring harness connector. If each resistance reading is less than 5 ohms, go to next step. If any resistance reading is 5 ohms or more, repair open in appropriate COIL circuit and retest system.
  31. Check COIL Circuit For Short Together Measure resistance between each COIL jack and all other COIL jacks at tester. If all resistance readings are 10,000 ohms or more, go to next step. If any resistance is less than 10,000 ohms, go to step 36.
  32. Check For Hard Faults Reconnect coil pack(s). Turn ignition on. Press tester RESET button. Wait for initialization and coil test to run. If COIL FAULT MEMORY LEDs are off, go to next step. If any COIL FAULT MEMORY LED is on or flashing, go to step 37.
  33. Wiggle Test Mode B Set tester WIGGLE TEST switch on. Set MODE switch to "B" position. Press RESET button and wait 5 seconds for initialization. Wiggle and bend wiring harness and connectors. If FAULT MEMORY LEDs are off, go to next step. If any FAULT MEMORY LED is on, press RESET button and wait for initialization. Continue to test until intermittent fault is located. Repair as necessary and retest.
  34. Wiggle Test Mode B With Coil Disconnected Turn ignition off. Disconnect coil pack(s). Turn ignition on. Press RESET button and wait 5 seconds for initialization. Wiggle and bend wiring harness and connectors. If FAULT MEMORY LEDs are off, replace PCM and retest. If any FAULT MEMORY LED is on, press RESET button and wait for initialization. Continue to test until intermittent fault is located. Repair as necessary and retest.
  35. Circuit Check Turn ignition off. Disconnect PCM. Reconnect tester to vehicle harness. Measure resistance between each COIL jack and PWR GND jack at tester. Measure resistance between COIL jack and VPWR jack at tester. If all resistance readings are 10,000 ohms or more, replace PCM and retest. If any resistance reading is less than 10,000 ohms, repair open in COIL circuit.
  36. Check For Short Between Coils Ensure ignition is off. Disconnect PCM. Reconnect tester between coils wiring harness. Measure resistance between each COIL jack and all other COIL jacks at tester. If all resistance readings are 10,000 ohms or more, replace PCM and retest. If any resistance reading is less than 10,000 ohms, repair short between COIL circuits.
  37. System Visual Check Ensure ignition is off. Check ignition system connectors for loose, damaged or corroded terminals. Repair as necessary and retest. If connectors are okay, replace ignition coil pack(s).
  38. Circuit Check Measure resistance between CTO jack and PWR GND jack at tester. Measure resistance between CTO jack and VPWR jack at tester. If any resistance reading is less than 1000 ohms, go to next step. If both resistance readings are more than 1000 ohms, go to step 40.
  39. Isolate CTO Short Leave ignition off. Disconnect PCM. Reconnect tester to vehicle wiring harness. Measure resistance between CTO jack and PWR GND jack at tester. Measure resistance between CTO jack and VPWR jack at tester. If both resistance readings are 1000 ohms or more, replace PCM and retest. If any resistance reading is less than 1000 ohms, repair fault in CTO circuit.
  40. Wiggle Test Mode B Turn ignition on. Set tester WIGGLE TEST switch on. Set MODE switch to "B" position. Press tester RESET button and wait 5 seconds for initialization. Wiggle and bend wiring harness and connectors. If all FAULT MEMORY LEDs are off, go to next step. If any FAULT MEMORY LED is on, press RESET button wait for initialization. Continue to test until intermittent fault is located. Repair as necessary and retest.
  41. Wiggle Test Set tester MODE switch to "A" position. Press tester RESET button and wait 5 seconds for initialization. Wiggle and bend wiring harness and connectors. If all FAULT MEMORY LEDs are off, replace PCM and retest. If any FAULT MEMORY LED is on, press RESET button and wait for initialization. Continue to test until intermittent fault is located. Repair as necessary and retest.
  42. Check CKP BIAS Turn ignition off. Disconnect CKP sensor connector. Turn ignition on. Press tester RESET button and wait 5 seconds for initialization. If CKP BIAS SYSTEM STATUS LED is off, go to next step. If CKP BIAS SYSTEM STATUS LED is on, go to step 44.
  43. Isolate Short Circuit Ensure ignition is off. Disconnect PCM. Reconnect tester to vehicle wiring harness. Measure resistance between CKP+ jack and PWR GND jack at tester. Measure resistance between CKP+ jack and VPWR jack at tester. If both resistance readings are more than 10,000 ohms, replace PCM and retest. If any resistance reading is 10,000 ohms or less, repair fault in CKP+ circuit.
  44. Circuit Check Measure resistance between CKP- jack and PWR GND jack at tester. Measure resistance between CKP- jack and VPWR jack at tester. If any resistance reading is 10,000 ohms or less, go to next step. If both resistance readings are more than 10,000 ohms, replace CKP sensor and retest.
  45. Isolate Short Circuit Ensure ignition is off. Disconnect PCM. Reconnect tester to vehicle wiring harness. Measure resistance between CKP- jack and PWR GND jack at tester. Measure resistance between CKP- jack and VPWR jack at tester. If both resistance readings are more than 10,000 ohms, replace PCM and retest. If any resistance reading is 10,000 ohms or less, repair fault in CKP- circuit.
  46. Check CKP Signal Press tester RESET button and wait 5 seconds for initialization. Crank or start engine. If CKP SIGNAL SYSTEM STATUS LED is off with engine running or during engine cranking, go to next step. If CKP SIGNAL SYSTEM STATUS LED is on, go to step 51.
  47. Circuit Check Turn ignition off. Disconnect CKP sensor connector. Measure resistance between CKP+ terminal at CKP sensor wiring harness connector and CKP+ jack at tester. Measure resistance between CKP- terminal at CKP sensor wiring harness connector and CKP- jack at tester. If both resistance readings are less than 5 ohms, go to next step. If any resistance reading is 5 ohms or more, repair CKP circuit and retest.
  48. Check For CKP+ Short Leave ignition off. Measure resistance between CKP+ jack and jacks for CKP-, PWR GND and VPWR at tester. If any resistance reading is 10,000 ohms or less, go to next step. If all resistance readings are more than 10,000 ohms, go to step 50.
  49. Isolate Short Circuit Ensure ignition is off. Disconnect PCM. Reconnect tester to vehicle wiring harness. Measure resistance between CKP+ jack and jacks for CKP-, PWR GND and VPWR at tester. If any resistance reading is 10,000 ohms or less, repair CKP+ circuit and retest. If all resistance readings are more than 10,000 ohms, replace PCM and retest.
  50. Sensor Check Turn ignition off. Inspect CKP sensor and pulse wheel for damage and correct alignment. Service sensor and pulse wheel as necessary. If no problems are found, replace CKP sensor and retest.
  51. Wiggle Test Mode B: CKP Circuit Turn ignition on. Set tester WIGGLE TEST switch on. Set MODE switch to "B" position. Press tester RESET button and wait 5 seconds for initialization. Wiggle and bend wiring harness and connectors. If FAULT MEMORY LEDs are off, go to next step. If any FAULT MEMORY LED is on, press RESET button and wait for initialization. Continue to test until intermittent fault is located. Repair as necessary and retest.
  52. Check CKP SHD For Short To Power Turn ignition off. Measure resistance between CASE GND/CKP SHD jack and VPWR jack at tester. If resistance is 10,000 ohms or less, go to next step. If resistance is more than 10,000 ohms, go to step 54.
  53. Isolate Short Ensure ignition is off. Disconnect PCM. Reconnect tester to vehicle wiring harness. Measure resistance between CASE GND/CKP SHD jack and VPWR jack at tester. If resistance is 10,000 ohms or less, repair CASE GND/CKP SHD circuit and retest. If resistance is more than 10,000 ohms, replace PCM and retest.
  54. Wiggle Test Mode B: CKP Circuit Turn ignition on. Set tester WIGGLE TEST switch on. Set MODE switch to "B" position. Press tester RESET button and wait 5 seconds for initialization. Wiggle and bend wiring harness and connectors. If FAULT MEMORY LEDs are off, repair CASE GND/CKP SHD circuit and retest. If any FAULT MEMORY LED is on, press RESET button and wait for initialization. Continue to test until intermittent fault is located. Repair as necessary and retest.

1999 Contour & Mystique (2.0L) Transaxle Wiring Diagram. Scheme 211

Scheme 211: 1999 Contour & Mystique (2.0L) Transaxle Wiring Diagram
Scheme 211: 1999 Contour & Mystique (2.0L) Transaxle Wiring Diagram

1999 Contour & Mystique (2.5L) Transaxle Wiring Diagram. Scheme 212

Scheme 212: 1999 Contour & Mystique (2.5L) Transaxle Wiring Diagram
Scheme 212: 1999 Contour & Mystique (2.5L) Transaxle Wiring Diagram

1999 Cougar Transaxle Wiring Diagram. Scheme 213

Scheme 213: 1999 Cougar Transaxle Wiring Diagram
Scheme 213: 1999 Cougar Transaxle Wiring Diagram

More articles — Diagnosis - CD4E Automatic Transmission