W DOC AIRBUS | TSM A320F

Loss of the Signal of the Channel A and Channel B of the TCC Sensors on Engine 2

TASK 73-20-00-810-972-A
Loss of the Signal of the Channel A and Channel B of the TCC Sensors on Engine 2

1. Possible Causes
  • TCC sensor
  • harness CJ13
  • harness J13
  • ECU [4000KS]
  • harness HJ13
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
BRUSH - BRISTLED
No specific
AR
PLIERS - NOSE, SOFT, LONG
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.CP2011)
stoddard solvent
 C. Referenced Information
REFERENCE
DESIGNATION
AMM 73-21-50-000-005
Removal of the CJ13 Harness
AMM 73-21-50-000-012
Removal of the J13 Harness
AMM 73-21-50-000-029
Removal of the CJ13 Harness
AMM 73-21-50-000-046
Removal of the HJ13 Harness for SAC Engines
AMM 73-21-50-210-001
Visual Inspection of the Wiring Harness
AMM 73-21-50-210-002
Visual Inspection of the Wiring Harnesses
AMM 73-21-50-400-005
Installation of the CJ13 Harness
AMM 73-21-50-400-012
Installation of the J13 Harness
AMM 73-21-50-400-029
Installation of the CJ13 Harness
AMM 73-21-50-400-046
Installation of the HJ13 Harness for SAC Engines
AMM 73-21-60-000-001
Removal of the Electronic Control Unit (ECU)
AMM 73-21-60-400-001
Installation of the Electronic Control Unit (ECU)
AMM 73-21-70-000-001
Removal of the High Pressure Turbine Clearance Control (HPTCC) Sensor
AMM 73-21-70-000-002
Removal of the High Pressure Turbine Clearance Control (HPTCC) Sensor
AMM 73-21-70-400-001
Installation of the High Pressure Turbine Clearance Control (HPTCC) Sensor
AMM 73-21-70-400-002
Installation of the High Pressure Turbine Clearance Control (HPTCC) Sensor
AMM 73-29-00-710-040
Operational Test of the FADEC on the ground (with Engine Motoring)
3. Fault Confirmation
Subtask 73-20-00-710-316-A ** ON A/C NOT FOR ALL
A. Do the operational test of the FADEC 2 on the ground (with engine non motoring) AMM 73-29-00-710-040.
4. Fault Isolation
Subtask 73-20-00-810-269-A ** ON A/C NOT FOR ALL
A. For configuration pre SB CFMI73-129
NOTE: The failure message is triggered if the TCC sensor channel A and channel B input is invalid (signal out of range) and the fault lasts for more than 20 seconds.
   (1) If the failure message TCC SENS, J13, ECU on both channels is not confirmed:
     (a) Do the following trouble shooting at next maintenance opportunity:
  • disconnect the CJ13 connector (TCC-A & TCC-B) from both TCC sensors (3 and 9 O'Clock).
  • visually examine the harness connectors and sensor receptacles for damaged pins or contamination/oxidation.
  • if damage is found, repair or replace as required.
  • do a cleaning of the connectors and receptacles using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-001.
  • connect the harness connectors to the sensors. Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
   (2) If the failure message TCC SENS, J13, ECU on one or both channels is not confirmed but is repetitive:
     (a) Do the following trouble shooting at next maintenance opportunity:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
       1 If the fault continues:
  • disconnect the harness J13 from the ECU (4000KS) connectors and the 6 o'clock junction box.
  • visually examine the harness connectors for damaged pins or contamination/oxidation.
  • if damage is found, repair or replace as required.
  • do a cleaning of the connectors and receptacles using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-001.
       2 If the fault continues:
       3 If the fault continues:
       4 If the fault continues:
   (3) If the failure message TCC SENS, J13, ECU on one or both channels is confirmed:
     (a) Disconnect the connectors (TCC-A & TCC-B) on the harness CJ13 from each of the TCC sensors and do a check of the resistance as follows:
  • place the positive (+) lead of an ohmmeter on the TCC sensor pin A and the negative (-) lead of the ohmmeter on the TCC sensor pin B. Record as r1.
  • place the positive (+) lead of an ohmmeter on the TCC sensor pin B and the negative (-) lead of the ohmmeter on the TCC sensor pin A. Record as r2.
  • find the average (r1+r2/2) (2.4 to 4.2 ohms).
       1 If the resistance values are out of the specified limits:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
       2 If the resistance values are in the specified limits:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use soft nose pliers.
  • disconnect the harness CJ13 from the 6 o'clock junction box and do a check of the CJ13 resistance cable between:
    . pins 14 and 15 (4.22 to 6.93 Ohms)
    . pins 5 and 6 (4.22 to 6.93 Ohms)
    . pins 14 and 4 (> 12 Megohms)
    . pins 5 and 4 (> 12 Megohms)
    . pin 14 and ground (> 10 Megohms)
    . pin 5 and ground (> 10 Megohms).
         a If the resistance values are out of the specified limits:
         b If the resistance values are in the specified limits:
  • disconnect the harness J13 from the ECU receptacle and do a check of the resistance between:
    . pins 7 and 8 (5.95 to 9.53 Ohms)
    . pins 18 and 19 (5.95 to 9.53 Ohms)
    . pins 7 and 17 (> 10 Megohms)
    . pins 18 and 17 (> 10 Megohms)
    . pin 7 and ground (> 10 Megohms)
    . pin 18 and ground (> 10 Megohms).

    * If the resistance values are out of the specified limits:
    - replace the harness J13 AMM 73-21-50-000-012 and AMM 73-21-50-400-012.

    * If the resistance values are in the specified limits:
    - replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
Subtask 73-20-00-810-271-A ** ON A/C NOT FOR ALL
B. For configuration post SB CFMI73-129.
NOTE: The failure message is triggered if the TCC sensor channel A and channel B input is invalid (signal out of range) and the fault lasts for more than 20 seconds.
   (1) If the failure message TCC SENS, J13, ECU on both channels is not confirmed:
     (a) Do the following trouble shooting at next maintenance opportunity:
  • disconnect the CJ13 connector (TCC) from the TCC sensor (3 O'Clock).
  • visually examine the harness connector and sensor receptacle for damaged pins or contamination/oxidation.
  • if damage is found, repair or replace as required.
  • do a cleaning of the connector and receptacle using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-001.
  • connect the harness connector (TCC) to the sensor. Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
   (2) If the failure message TCC SENS, J13, ECU on both channels is not confirmed but is repetitive:
     (a) Do the following trouble shooting at next maintenance opportunity:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
       1 If the fault continues:
  • disconnect the harness J13 from the ECU connector and the 6 o'clock junction box.
  • visually examine the harness connectors for damaged pins or contamination/oxidation.
  • if damage is found, repair or replace as required.
  • do a cleaning of the connectors and receptacles using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-001.
       2 If the fault continues:
       3 If the fault continues:
       4 If the fault continues:
NOTE: It is extremely unlikely that the ECU can be faulty in the case the failure message TCC SENS, J13, ECU is triggered on both channels A & B. Therefore, the replacement of the ECU should be attempted only when all recommended above trouble shooting has been performed and failed to fix the fault.
   (3) If the failure message TCC SENS, J13, ECU on one or both channels is confirmed:
     (a) Disconnect the connector (TCC) on the harness CJ13 from the 3 O'Clock TCC sensor and do a check of the resistance as follows:
  • place the positive (+) lead of an ohmmeter on the TCC sensor pin A and the negative (-) lead of the ohmmeter on the TCC sensor pin B. Record as r1.
  • place the positive (+) lead of an ohmmeter on the TCC sensor pin B and the negative (-) lead of the ohmmeter on the TCC sensor pin A. Record as r2.
  • find the average (r1+r2/2) (2.4 to 4.2 ohms).
       1 If the resistance values are out of the specified limits:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
       2 If the resistance values are in the specified limits:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use soft nose pliers.
  • disconnect the harness CJ13 from the 6 o'clock junction box and do a check of the CJ13 resistance cable between:
    . pins 14 and 15 (4.22 to 6.93 Ohms)
    . pins 14 and 4 (> 12 Megohms)
    . pin 14 and ground (> 10 Megohms).
         a If the resistance values are out of the specified limits:
         b If the resistance values are in the specified limits:
  • disconnect the harness J13 from the ECU receptacle and do a check of the resistance between:
    . pins 18 and 19 (5.95 to 9.53 Ohms)
    . pins 7 and 17 (> 10 Megohms)
    . pins 18 and 17 (> 10 Megohms)
    . pin 7 and ground (> 10 Megohms)
    . pin 18 and ground (> 10 Megohms).

    * If the resistance values are out of the specified limits:
    - replace the harness J13 AMM 73-21-50-000-012 and AMM 73-21-50-400-012.

    * If the resistance values are in the specified limits:
    - replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
Subtask 73-20-00-810-269-B ** ON A/C NOT FOR ALL
C. For configuration pre SB CFMI73-046
NOTE: The failure message is triggered if the TCC sensor channel A and channel B input is invalid (signal out of range) and the fault lasts for more than 20 seconds.
   (1) If the failure message TCC SNSR, J13, ECU on both channels is not confirmed:
     (a) Do the following trouble shooting at next maintenance opportunity:
  • disconnect the CJ13 connector (TCC-A & TCC-B) from both TCC sensors (3 and 9 O'Clock).
  • visually examine the harness connectors and sensor receptacles for damaged pins or contamination/oxidation.
  • if damage is found, repair or replace as required.
  • do a cleaning of the connectors and receptacles using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-002.
  • connect the harness connectors to the sensors. Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
   (2) If the failure message TCC SNSR, J13, ECU on one or both channels is not confirmed but is repetitive:
     (a) Do the following trouble shooting at next maintenance opportunity:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
       1 If the fault continues:
  • disconnect the harness HJ13 from the ECU (4000KS) connectors and the 6 o'clock junction box.
  • visually examine the harness connectors for damaged pins or contamination/oxidation.
  • if damage is found, repair or replace as required.
  • do a cleaning of the connectors and receptacles using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-002.
       2 If the fault continues:
       3 If the fault continues:
       4 If the fault continues:
   (3) If the failure message TCC SNSR, J13, ECU on one or both channels is confirmed:
     (a) Disconnect the connectors (TCC-A & TCC-B) on the harness CJ13 from each of the TCC sensors and do a check of the resistance as follows:
  • place the positive (+) lead of an ohmmeter on the TCC sensor pin A and the negative (-) lead of the ohmmeter on the TCC sensor pin B. Record as r1.
  • place the positive (+) lead of an ohmmeter on the TCC sensor pin B and the negative (-) lead of the ohmmeter on the TCC sensor pin A. Record as r2.
  • find the average (r1+r2/2) (2.4 to 4.2 ohms).
       1 If the resistance values are out of the specified limits:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
       2 If the resistance values are in the specified limits:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use soft nose pliers.
  • disconnect the harness CJ13 from the 6 o'clock junction box and do a check of the CJ13 resistance cable between:
    . pins 14 and 15 (4.22 to 6.93 Ohms)
    . pins 5 and 6 (4.22 to 6.93 Ohms)
    . pins 14 and 4 (> 10 Megohms)
    . pins 5 and 4 (> 10 Megohms)
    . pin 14 and ground (> 10 Megohms)
    . pin 5 and ground (> 10 Megohms).
         a If the resistance values are out of the specified limits:
         b If the resistance values are in the specified limits:
  • disconnect the harness HJ13 from the ECU receptacle and do a check of the resistance between:
    . pins 7 and 8 (5.95 to 9.53 Ohms)
    . pins 18 and 19 (5.95 to 9.53 Ohms)
    . pins 7 and 17 (> 10 Megohms)
    . pins 18 and 17 (> 10 Megohms)
    . pin 7 and ground (> 10 Megohms)
    . pin 18 and ground (> 10 Megohms).

    * If the resistance values are out of the specified limits:
    - replace the harness HJ13 AMM 73-21-50-000-046 and AMM 73-21-50-400-046.

    * If the resistance values are in the specified limits:
    - replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
Subtask 73-20-00-810-271-B ** ON A/C NOT FOR ALL
D. For configuration post SB CFMI73-046.
NOTE: The failure message is triggered if the TCC sensor channel A and channel B input is invalid (signal out of range) and the fault lasts for more than 20 seconds.
   (1) If the failure message TCC SNSR, J13, ECU on both channels is not confirmed:
     (a) Do the following trouble shooting at next maintenance opportunity:
  • disconnect the CJ13 connector (TCC) from the TCC sensor (3 O'Clock).
  • visually examine the harness connector and sensor receptacle for damaged pins or contamination/oxidation.
  • if damage is found, repair or replace as required.
  • do a cleaning of the connector and receptacle using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-002.
  • connect the harness connector (TCC) to the sensor. Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
   (2) If the failure message TCC SNSR, J13, ECU on both channels is not confirmed but is repetitive:
     (a) Do the following trouble shooting at next maintenance opportunity:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
       1 If the fault continues:
  • disconnect the harness HJ13 from the ECU connector and the 6 o'clock junction box.
  • visually examine the harness connectors for damaged pins or contamination/oxidation.
  • if damage is found, repair or replace as required.
  • do a cleaning of the connectors and receptacles using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-002.
       2 If the fault continues:
       3 If the fault continues:
       4 If the fault continues:
NOTE: It is extremely unlikely that the ECU can be faulty in the case the failure message TCC SNSR, J13, ECU is triggered on both channels A & B. Therefore, the replacement of the ECU should be attempted only when all recommended above trouble shooting has been performed and failed to fix the fault.
   (3) If the failure message TCC SNSR, J13, ECU on one or both channels is confirmed:
     (a) Disconnect the connector (TCC) on the harness CJ13 from the 3 O'Clock TCC sensor and do a check of the resistance as follows:
  • place the positive (+) lead of an ohmmeter on the TCC sensor pin A and the negative (-) lead of the ohmmeter on the TCC sensor pin B. Record as r1.
  • place the positive (+) lead of an ohmmeter on the TCC sensor pin B and the negative (-) lead of the ohmmeter on the TCC sensor pin A. Record as r2.
  • find the average (r1+r2/2) (2.4 to 4.2 ohms).
       1 If the resistance values are out of the specified limits:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
       2 If the resistance values are in the specified limits:
NOTE: Tighten the connector by hand plus one eighth of a turn. if necessary use soft nose pliers.
  • disconnect the harness CJ13 from the 6 o'clock junction box and do a check of the CJ13 resistance cable between:
    . pins 5 and 6 (> 10 megaohms)
    . pins 14 and 15 (4.22 to 6.93 Ohms)
    . pins 5 and 4 (> 10 Megaohms)
    . pins 14 and 4 (> 10 Megaohms)
    . pins 5 and the ground (> 10 Megaohms)
    . pins 14 and the ground (> 10 Megaohms)
         a If the resistance values are out of the specified limits:
         b If the resistance values are in the specified limits:
  • disconnect the harness HJ13 from the ECU receptacle and do a check of the resistance between:
    . pins 18 and 19 (5.95 to 9.53 Ohms)
    . pins 18 and 17 (> 10 megaohms)
    . pins 18 and the ground (> 10 megaohms)

    * If the resistance values are out of the specified limits:
    - replace the harness HJ13 AMM 73-21-50-000-046 and AMM 73-21-50-400-046.

    * If the resistance values are in the specified limits:
    - replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
Subtask 73-20-00-810-269-C ** ON A/C NOT FOR ALL
E. For configuration pre SB CFMI73-129
NOTE: The failure message is triggered if the TCC sensor channel A and channel B input is invalid (signal out of range) and the fault lasts for more than 20 seconds.
   (1) If the failure message TCC SNSR, J13, ECU on both channels is not confirmed:
     (a) Do the following trouble shooting at next maintenance opportunity:
  • disconnect the CJ13 connector (TCC-A & TCC-B) from both TCC sensors (3 and 9 O'Clock).
  • visually examine the harness connectors and sensor receptacles for damaged pins or contamination/oxidation.
  • if damage is found, repair or replace as required.
  • do a cleaning of the connectors and receptacles using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-001.
  • connect the harness connectors to the sensors. Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
   (2) If the failure message TCC SNSR, J13, ECU on one or both channels is not confirmed but is repetitive:
     (a) Do the following trouble shooting at next maintenance opportunity:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
       1 If the fault continues:
  • disconnect the harness J13 from the ECU (4000KS) connectors and the 6 o'clock junction box.
  • visually examine the harness connectors for damaged pins or contamination/oxidation.
  • if damage is found, repair or replace as required.
  • do a cleaning of the connectors and receptacles using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-001.
       2 If the fault continues:
       3 If the fault continues:
       4 If the fault continues:
   (3) If the failure message TCC SNSR, J13, ECU on one or both channels is confirmed:
     (a) Disconnect the connectors (TCC-A & TCC-B) on the harness CJ13 from each of the TCC sensors and do a check of the resistance as follows:
  • place the positive (+) lead of an ohmmeter on the TCC sensor pin A and the negative (-) lead of the ohmmeter on the TCC sensor pin B. Record as r1.
  • place the positive (+) lead of an ohmmeter on the TCC sensor pin B and the negative (-) lead of the ohmmeter on the TCC sensor pin A. Record as r2.
  • find the average (r1+r2/2) (2.4 to 4.2 ohms).
       1 If the resistance values are out of the specified limits:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
       2 If the resistance values are in the specified limits:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use soft nose pliers.
  • disconnect the harness CJ13 from the 6 o'clock junction box and do a check of the CJ13 resistance cable between:
    . pins 14 and 15 (4.22 to 6.93 Ohms)
    . pins 5 and 6 (4.22 to 6.93 Ohms)
    . pins 14 and 4 (> 12 Megohms)
    . pins 5 and 4 (> 12 Megohms)
    . pin 14 and ground (> 10 Megohms)
    . pin 5 and ground (> 10 Megohms).
         a If the resistance values are out of the specified limits:
         b If the resistance values are in the specified limits:
  • disconnect the harness J13 from the ECU receptacle and do a check of the resistance between:
    . pins 7 and 8 (5.95 to 9.53 Ohms)
    . pins 18 and 19 (5.95 to 9.53 Ohms)
    . pins 7 and 17 (> 10 Megohms)
    . pins 18 and 17 (> 10 Megohms)
    . pin 7 and ground (> 10 Megohms)
    . pin 18 and ground (> 10 Megohms).

    * If the resistance values are out of the specified limits:
    - replace the harness J13 AMM 73-21-50-000-012 and AMM 73-21-50-400-012.

    * If the resistance values are in the specified limits:
    - replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
Subtask 73-20-00-810-271-C ** ON A/C NOT FOR ALL
F. For configuration post SB CFMI73-129.
NOTE: The failure message is triggered if the TCC sensor channel A and channel B input is invalid (signal out of range) and the fault lasts for more than 20 seconds.
   (1) If the failure message TCC SNSR, J13, ECU on both channels is not confirmed:
     (a) Do the following trouble shooting at next maintenance opportunity:
  • disconnect the CJ13 connector (TCC) from the TCC sensor (3 O'Clock).
  • visually examine the harness connector and sensor receptacle for damaged pins or contamination/oxidation.
  • if damage is found, repair or replace as required.
  • do a cleaning of the connector and receptacle using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-001.
  • connect the harness connector (TCC) to the sensor. Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
   (2) If the failure message TCC SNSR, J13, ECU on both channels is not confirmed but is repetitive:
     (a) Do the following trouble shooting at next maintenance opportunity:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
       1 If the fault continues:
  • disconnect the harness J13 from the ECU connector and the 6 o'clock junction box.
  • visually examine the harness connectors for damaged pins or contamination/oxidation.
  • if damage is found, repair or replace as required.
  • do a cleaning of the connectors and receptacles using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-001.
       2 If the fault continues:
       3 If the fault continues:
       4 If the fault continues:
NOTE: It is extremely unlikely that the ECU can be faulty in the case the failure message TCC SNSR, J13, ECU is triggered on both channels A & B. Therefore, the replacement of the ECU should be attempted only when all recommended above trouble shooting has been performed and failed to fix the fault.
   (3) If the failure message TCC SNSR, J13, ECU on one or both channels is confirmed:
     (a) Disconnect the connector (TCC) on the harness CJ13 from the 3 O'Clock TCC sensor and do a check of the resistance as follows:
  • place the positive (+) lead of an ohmmeter on the TCC sensor pin A and the negative (-) lead of the ohmmeter on the TCC sensor pin B. Record as r1.
  • place the positive (+) lead of an ohmmeter on the TCC sensor pin B and the negative (-) lead of the ohmmeter on the TCC sensor pin A. Record as r2.
  • find the average (r1+r2/2) (2.4 to 4.2 ohms).
       1 If the resistance values are out of the specified limits:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use PLIERS - NOSE, SOFT, LONG.
       2 If the resistance values are in the specified limits:
NOTE: Tighten the connector by hand plus one eighth of a turn. If necessary use soft nose pliers.
  • disconnect the harness CJ13 from the 6 o'clock junction box and do a check of the CJ13 resistance cable between:
    . pins 14 and 15 (4.22 to 6.93 Ohms)
    . pins 14 and 4 (> 12 Megohms)
    . pin 14 and ground (> 10 Megohms).
         a If the resistance values are out of the specified limits:
         b If the resistance values are in the specified limits:
  • disconnect the harness J13 from the ECU receptacle and do a check of the resistance between:
    . pins 18 and 19 (5.95 to 9.53 Ohms)
    . pins 7 and 17 (> 10 Megohms)
    . pins 18 and 17 (> 10 Megohms)
    . pin 7 and ground (> 10 Megohms)
    . pin 18 and ground (> 10 Megohms).

    * If the resistance values are out of the specified limits:
    - replace the harness J13 AMM 73-21-50-000-012 and AMM 73-21-50-400-012.

    * If the resistance values are in the specified limits:
    - replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
Subtask 73-20-00-710-317-A ** ON A/C NOT FOR ALL
G. Do the test given in Para. 3.A.
   (1) No additional maintenance action is required if the fault is not confirmed.
   (2) Repeat the fault isolation procedure if the fault continues.
[Rev.8 from Aug 2018] 2026.04.04 04:35:31 UTC
"WTRUIB" 2025