Security & Locks: Diagnosis Mazda MPV II

PRELIMINARY INSPECTION

Note. Perform the following preliminary inspection before attempting any other diagnostic or trouble shooting procedure.

1. Determine if installed system is an aftermarket system. If an aftermarket system is installed, refer to owner's aftermarket system manual for diagnostic procedure. If system is original equipment, go to next step.
2. Determine if customer attempted to activate system while ignition switch was in ON position. Anti-theft/keyless entry system will only activate when ignition switch is in LOCK position. If malfunction occurred while ignition switch was in LOCK position, go to next step.
3. Determine if customer experienced problems in a specific location, such as being near TV towers, power plant, power lines or factories. Outside interference from these sources may cause system to malfunction. If problem is not specific to a certain area, go to next step.
4. Determine if any aftermarket equipment is installed on vehicle such as cellular phone, radio wave equipment, remote engine starter or TV. If aftermarket equipment is installed, disconnect it and try to operate anti-theft/keyless entry system. If anti-theft/keyless entry system now operates normally, inform customer that aftermarket equipment is interfering with anti-theft/keyless entry system operation. If system still does not operate normally, or if no aftermarket equipment is installed, go to next step.
5. Perform system diagnostic function check. See «DIAGNOSTIC FUNCTION CHECK»(ref-99375-S26455916482001071200000) . If system performed diagnostic function check as specified, go to next step. If system did not perform diagnostic function check as specified, go to step 7 .
6. Attempt to reprogram keyless control module ID code. See «CHANGING KEYLESS CONTROL MODULE ID CODE»(ref-99375-S16952663572001071200000) under PROGRAMMING. If you were able to reprogram keyless control module ID code, system is operating normally at this time. If you were unable to reprogram keyless control module ID code, go to «TEST NO. 3: TRANSMITTER ID CODE CANNOT BE REPROGRAMMED»(ref-99375-S22441262902001071200000) under SYSTEM TESTS.
7. While performing diagnostic function check, if any diagnostic functions worked, go to «TEST NO. 1: ONE OR MORE DIAGNOSTIC FUNCTIONS INOPERATIVE»(ref-99375-S27384903302001071200000) under SYSTEM TESTS. If no diagnostic functions worked, go to «TEST NO. 2: ALL DIAGNOSTIC FUNCTIONS INOPERATIVE»(ref-99375-S19603485462001071200000) under SYSTEM TESTS.

DIAGNOSTIC FUNCTION CHECK (KEYLESS ENTRY)

1. Remove key from ignition. Close all doors. Open driver's door. Go to next step.
2. Complete this step within 30 seconds. Reinsert ignition key into ignition. Turn ignition switch to ON position, then back to LOCK position. Remove ignition key. Push driver's door lock switch 3 times. Repeat this step 3 more times. Go to next step.
3. Confirm following responses occur, in order, within 7 seconds: All doors lock. Driver's door unlocks. All other doors unlock. Horn sounds and headlights flash twice while hazard lights flash. If all responses occurred as specified, diagnostic function is operating properly. Diagnosis is complete. If all responses did not occur as specified, perform appropriate system diagnosis. See «SYMPTOM TESTS»(ref-99375-S09274074362001071200000) .

DIAGNOSTIC TESTING (IMMOBILIZER SYSTEM)

For immobilizer system wiring diagram see scheme 49and see scheme 50 under WIRING DIAGRAMS.

Note. When the immobilizer system is defective, the engine starts once and soon stalls after turning the starter for the first three times. The engine cannot be started after the third time. If engine condition is normal but light stays on, inspect for continuity between the following wiring harness and body ground: security light and immobilizer unit terminal M. Repair or replace the wiring harness if necessary.

1. Turn the ignition switch to START position for 2 seconds , then back to ON position.
2. Wait for 2 minutes .
3. Verify the security light condition and read the DTC if indicated.
4. Verify the DTC with WDS set or equivalent.
5. If the DTC is indicated, go to troubleshooting referring to the DTC table. See «DTC TABLE»(ref-99375-S36810512042006020700000) .

Diagnostic Trouble Code Table. Scheme 1

Note. Perform the following if the security light stays on: If gasoline engine stalls, go to symptom troubleshooting no. 11 "engine stalls/quits, engine runs rough, misses, buck/jerk, hesitation/stumble, surges". If gasoline engine wont start, go to symptom troubleshooting no. 6, "cranks normally but will not start". If engine condition is normal but light stays on, inspect for continuity between the following wiring harness and body ground: security light and immobilizer unit terminal "M". Repair or replace the wiring harness.

DIAGNOSTIC TROUBLE CODES (DTC) LIST

DTC 1: ID Number Unregistered In Immobilizer Unit Is Input After Engine Cranking Possible Cause. Scheme 2

DTC 1: ID Number Unregistered In Immobilizer Unit Is Input After Engine Cranking Diagnostic Procedure. Scheme 3

DTC 2: ID Format Error (Voltage Range, Frequency) Possible Cause. Scheme 4

DTC 2: ID Format Error (Voltage Range, Frequency) Diagnostic Procedure. Scheme 5

DTC 3: ID Number Is Not Input Into Immobilizer Unit After Cranking Engine Possible Cause - DTC 3. Scheme 6

DTC 3: ID Number Is Not Input Into Immobilizer Unit After Cranking Engine Diagnostic Procedure. Scheme 7

DTC 11: Coil Or Wiring Harness Between Immobilizer Unit & Coil Is Open Circuit Possible Cause. Scheme 8

DTC 11: Coil Or Wiring Harness Between Immobilizer Unit & Coil Is Open Circuit Diagnostic Procedure. Scheme 9

DTC 21: Code Word/ID Number Memorized In Immobilizer Unit EEPROM Cannot Be Read Possible Cause. Scheme 10

DTC 21: Code Word/ID Number Memorized In Immobilizer Unit EEPROM Cannot Be Read Diagnostic Procedure. Scheme 11

DTC 24: Open Or Short Circuit In Wiring Harness Between Immobilizer Unit & PCM Possible Cause. Scheme 12

DTC 24: Open Or Short Circuit In Wiring Harness Between Immobilizer Unit & PCM - Identifying Immobilizer Unit Connector Terminals. Scheme 13

DTC 24: Open Or Short Circuit In Wiring Harness Between Immobilizer Unit & PCM Diagnostic Procedure. Scheme 14

DTC 30: Immobilizer Unit - PCM Communication Error Possible Cause. Scheme 15

DTC 30: Immobilizer Unit - PCM Communication Error Diagnostic Procedure. Scheme 16

SYMPTOM TESTS

Locate description of problem in SYMPTOM INDEX table, then go to appropriate test for diagnosis.

SYMPTOM INDEX

Diagnostic Procedure

1. Perform diagnostic function check. See «DIAGNOSTIC FUNCTION CHECK»(ref-99375-S26455916482001071200000) under TROUBLE SHOOTING. If all functions operated as specified, go to step 11. If all functions did not operate as specified, go to next step.
2. If horn sounded during diagnostic function check, go to step 5. If horn did not sound during diagnostic function check, go to next step.
3. Depress horn switch. If horn sounds, go to next step. If horn does not sound, repair horn circuit as necessary. See «HORN»(ref-132320-S30665766052002121100000) in SYSTEM WIRING DIAGRAMS article.
4. Turn ignition switch to LOCK position. Disconnect theft deterrent control module and horn relay connectors. Using DVOM, check for continuity on Green/Red wire between theft deterrent control module connector No. 2, terminal 2C and horn relay connector. see scheme 47and see scheme 48 under WIRING DIAGRAMS. If continuity is indicated, replace theft deterrent control module. If continuity is not indicated, repair open circuit in Green/Red wire between theft deterrent control module connector terminal 2C and horn relay connector. After performing either repair, go to step 24.
5. If headlights flashed during diagnostic function check, go to step 8. If headlights did not flash during diagnostic function check, go to next step.
6. Turn headlight switch on. If headlights turn on, go to next step. If headlights do not turn on, repair headlight circuit. See EXTERIOR LIGHTS article.
7. Turn ignition switch to LOCK position. Disconnect keyless control module and headlight relay connectors. Using DVOM, check for continuity on White/Red wire between theft deterrent control module connector No. 2, terminal 2E and headlight relay connector. If continuity is indicated, replace theft deterrent control module. If continuity is not indicated, repair open circuit in White/Red wire between theft deterrent control module connector terminal 2E and headlight relay connector. After performing either repair, go to step 24.
8. If hazard warning lights flashed during diagnostic function check, recheck malfunction symptoms. If malfunction reoccurs, go back to step 1. If hazard warning lights did not flash during diagnostic function check, go to next step.
9. Turn hazard warning light switch on. If hazard warning lights flash, go to next step. If hazard warning lights do not flash, repair hazard warning light circuit. See EXTERIOR LIGHTS article.
10. Turn ignition switch to LOCK position. Disconnect theft deterrent control module and flasher control module connectors. Using DVOM, check for continuity on Blue wire between theft deterrent control module connector No. 2 terminal 2S and flasher control module connector. see scheme 47and see scheme 48 under WIRING DIAGRAMS. If continuity is indicated, replace theft deterrent control module. If continuity is not indicated, repair open circuit in Blue wire between theft deterrent control module connector No. 2, terminal 2E and flasher control module connector. After performing either repair, go to step 24.
11. If all doors unlocked and locked, then driver's door unlocked as specified during diagnostic function check, recheck malfunction symptoms. If malfunction reoccurs, go back to step 1 and retest. If all doors did not lock and unlock as specified during diagnostic function check, go to next step.
12. Manually operate all inner door lock knobs to ensure that all doors lock and unlock. If all locks function properly, go to next step. If any locks do not function properly, locate and repair problem with door lock linkage.
13. If all doors unlocked as specified during diagnostic function check, go to step 21. If any door locks did not lock as specified during diagnostic function check, go to next step.
14. Attempt to unlock all doors from driver's door lock switch. If all doors unlock from driver's door lock switch, go to step 20. If all doors do not unlock from driver's door lock switch, go to next step.
15. Measure voltage, by backprobing, between Light Green/Black wire at driver door lock switch connector and ground. Voltage should be about 2.5 volts with driver door lock switch in lock position and zero volts with driver door lock switch in unlock position. If voltage is as specified, go to next step. If voltage is not as specified, go to step 17.
16. Turn ignition switch to LOCK position. Disconnect theft deterrent control module. Ground theft deterrent control module connector No. 2, terminal 2O (Green wire). If all doors unlock, replace theft deterrent control module. If all doors do not unlock, repair power door lock system. After performing either repair, go to step 24.
17. Turn ignition switch to LOCK position. Disconnect theft deterrent control module. Ground theft deterrent control module connector terminal 2O (Green wire). If all doors unlock, go to next step. If all doors do not unlock, repair power door lock system. After repairs, go to step 24.
18. Disconnect driver door lock switch connector. Measure voltage between Light Green/Black wire at driver door lock switch connector and ground. If voltage is about 5 volts, check driver door lock switch. If voltage is not about 5 volts, go to next step.
19. Disconnect theft deterrent control module. Check continuity in Light Green/Black wire between theft deterrent control module connector No. 2, terminal 2J and driver door lock switch. If continuity is indicated, replace theft deterrent control module. If continuity is not indicated, repair open circuit in Light Green/Black wire between theft deterrent control module connector No. 2, terminal 2J and driver door switch connector. After performing either repair, go to step 24.
20. Turn ignition switch to LOCK position. Disconnect keyless control module connector. Using DVOM, measure voltage at keyless control module connector terminal "K" (Green wire). If voltage reading is about 5 volts, replace keyless control module. Reprogram keyless control module ID code. See «CHANGING KEYLESS CONTROL MODULE ID CODE»(ref-99375-S16952663572001071200000) under PROGRAMMING. If voltage reading is not about 5 volts, repair faulty circuit in Green wire between keyless control module connector terminal "K" and door lock control module connector terminal "F". see scheme 47and see scheme 48 under WIRING DIAGRAMS. After performing either repair, go to step 24.
21. If all doors locked, and driver's door unlocked as specified during diagnostic function check, recheck malfunction symptoms. If malfunction reoccurs, go back to step 1 and retest. If door locks did not lock, and driver's door did not unlock as specified during diagnostic function check, go to next step.
22. Insert ignition key into driver's door lock cylinder. Attempt to lock all doors, then unlock driver's door. If all locks operate as specified, go to next step. If all locks do not operate as specified, locate and repair fault in driver's door lock switch circuit. see scheme 47and see scheme 48 under WIRING DIAGRAMS.
23. Turn ignition switch to LOCK position. Disconnect keyless control module connector. Using DVOM, measure voltage at keyless control module connector terminal "O" (Light Green wire). If voltage reading is about 5 volts, replace keyless control module. Reprogram keyless control module ID code. See «CHANGING KEYLESS CONTROL MODULE ID CODE»(ref-99375-S16952663572001071200000) under PROGRAMMING. If voltage reading is not about 5 volts, repair faulty circuit in Light Green wire between keyless control module connector terminal "O" and door lock control module connector terminal "H". see scheme 47and see scheme 48 under WIRING DIAGRAMS. After performing either repair, go to next step.
24. Recheck anti-theft/keyless entry system operation. If system is functioning properly, repairs are complete. If system is still malfunctioning, go back to step 1 and retest system.

1. Inspect for blown ENGINE fuse (10-amp), METER fuse (10-amp) or ROOM fuse (10-amp) located in underdash fuse block. If all fuses are okay, go to next step. If any fuse is blown, check for short to ground in affected circuit. Repair as necessary and replace blown fuse.
2. Check to ensure that all door switches are installed securely. If all switches are properly installed, go to next step. If any switches are not properly installed, repair switch and go to step 5 of PRELIMINARY INSPECTION under TROUBLE SHOOTING.
3. Inspect door switch using instrument cluster input/output check mode. See INSTRUMENT PANELS - MPV article. If door switch functions properly, go to next step. If door switch does not function properly, repair as necessary. After repairs, go to step 13.
4. Disconnect keyless control module. Measure voltage between keyless control module connector terminal "J" (Blue/Orange wire) and ground. If voltage is about 5 volts, go to step 13. If voltage is not about 5 volts, go to next step.
5. Measure voltage, by backprobing, between theft deterrent control module connector No. 1, terminal 1B (Blue/Red wire) and ground. If battery voltage is present, go to next step. If battery voltage is not present, repair Blue/Red wire between theft deterrent control module and fuse block. After repairs, go to step 13.
6. Disconnect theft deterrent control module. Measure voltage between theft deterrent control module connector No. 1, terminal 1F (Black wire) and ground. Measure voltage between theft deterrent control module connector No 2, terminal 2T and ground. If battery voltage is present in either test, repair short to power in appropriate wire. After repairs, go to step 13. If battery voltage is not present, go to next step.
7. Check continuity between theft deterrent control module connector No. 1, terminal 1F and ground. If continuity is indicated, go to next step. If continuity is not indicated, repair open in Black wire between theft deterrent control module and ground. After repairs, go to step 13.
8. Check continuity between theft deterrent control module connector No. 2, terminal 2T (Blue/Orange wire) and ground. If continuity is indicated, repair short to ground in Blue/Orange wire between theft deterrent control module and keyless control module. After repairs, go to step 13. If continuity is not indicated, go to next step.
9. Turn ignition switch to ON position. Using DVOM, measure voltage between ground and keyless control module by backprobing connector terminal "A" (Blue/Yellow wire). Measure voltage between ground and keyless control module by backprobing connector terminal "B" (Blue/Red wire). see scheme 47and see scheme 48 under WIRING DIAGRAMS. Reading should be about 12 volts at each terminal. If voltage is as specified, go to next step. If voltage at either terminal is not as specified, repair affected circuit between keyless control module and underdash fuse block. After repairs, go to step 13.
10. Turn ignition switch to LOCK position. Disconnect keyless control module connector. Check for short circuit to voltage by measuring between ground and keyless control module connector terminals "A" (Blue/Yellow wire) and "L" (Black wire). If reading at both terminals is zero volts, go to next step. If reading at either terminal is about 12 volts, locate and repair short to voltage in affected circuit. After repairs, go to step 13.
11. Check for continuity between ground and keyless control module connector terminal "L" (Black wire). If continuity is indicated, go to next step. If continuity is not indicated, repair open circuit between control module connector terminal "L" (Black wire) and ground. see scheme 47and see scheme 48 under WIRING DIAGRAMS. After repairs, go to step 13.
12. Open driver's door. Using DVOM, check for continuity between ground and keyless control module connector terminal "C" (Black/Red wire). If continuity is indicated, replace keyless control module. See «KEYLESS CONTROL MODULE»(ref-99375-S31891776142001071200000) under REMOVAL & INSTALLATION. Reprogram keyless control module ID code. See «CHANGING KEYLESS CONTROL MODULE ID CODE»(ref-99375-S16952663572001071200000) under PROGRAMMING. If continuity is not indicated, locate and repair faulty circuit between keyless control module and door switches. See ILLUMINATION/INTERIOR LIGHTS article. After either repairs, go to next step.
13. Recheck anti-theft/keyless entry system operation. If system is functioning properly, repairs are complete. If system is still malfunctioning, go back to step and retest system.

1. Remove rear cover on transmitter. see scheme 34 Inspect battery for correct installation and type (CR2025). Check for rust or poor connections between terminals and battery. Repair any problems found and go to step 6. If no problems were found, go to next step.
2. Check battery voltage. See «TRANSMITTER BATTERY»(ref-99375-S42281772042001071200000) under COMPONENT TESTS. If battery voltage is as specified, go to next step. If battery voltage is not as specified, replace battery and go to step 6.
3. Inspect keyless control module bracket and ground screw for loose installation. If bracket and ground screw are securely installed, go to next step. If bracket or ground screw is not securely installed, tighten bracket or ground screw and go to step 6 of PRELIMINARY INSPECTION under TROUBLE SHOOTING.
4. Substitute known-good battery in transmitter and retest. If anti-theft/keyless entry system works properly, replace battery and go to step 6. If anti-theft/keyless entry system does not work properly, go to next step.
5. Using another known-good transmitter, reprogram keyless control module ID code. See «CHANGING KEYLESS CONTROL MODULE ID CODE»(ref-99375-S16952663572001071200000) under PROGRAMMING. If anti-theft/keyless entry system works properly, replace transmitter. If anti-theft/keyless entry system does not work properly, replace keyless control module. See «KEYLESS CONTROL MODULE»(ref-99375-S31891776142001071200000) under REMOVAL & INSTALLATION. Reprogram keyless control module ID code and go to next step.
6. Recheck anti-theft/keyless entry system operation. If system is functioning properly, repairs are complete. If system is still malfunctioning, go back to step 1 and retest system.

Immobilizer Unit Inspection

1. Measure the voltage at the immobilizer unit terminals as indicated below.
2. Disconnect the immobilizer unit connector before inspecting for continuity at terminal C. If not as specified, inspect the parts listed under "Action". (Scheme 18)If the parts and wiring harnesses are okay but the system still does not work properly, replace the immobilizer unit.

Identifying Immobilizer Unit Connector Terminals. Scheme 17

Terminal Voltage Table (Immobilizer Unit). Scheme 18