- 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.

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 - do a cleaning of the connectors and receptacles using a bristle brush with stoddard solvent (Material No. CP2011) (Ref. AMM TASK 73-21-50-210-002).
 2 If the fault continues:
_

 - replace the harness CJ13 (Ref. AMM TASK 73-21-50-000-029) and (Ref. AMM TASK 73-21-50-400-029).
 3 If the fault continues:
_

 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 4 If the fault continues:
_

 - replace the harness harness HJ13 (Ref. AMM TASK 73-21-50-000-046) and (Ref. AMM TASK 73-21-50-400-046).
 (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:
_

 - replace the TCC sensor (Ref. AMM TASK 73-21-70-000-002) and (Ref. AMM TASK 73-21-70-400-002).
 NOTE : Tighten the connector by hand plus one eighth of a
____ turn. If necessary use soft nose pliers.
 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 (2.4 to 4.2 Ohms) . pins 5 and 6 (2.4 to 4.2 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).
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 E 56 E E E a If the resistance values are out of the specified limits:

_

 - replace the harness CJ13 (Ref. AMM TASK 73-21-50-000-029) and (Ref. AMM TASK 73-21-50-400-029).
 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 (2.4 to 4.2 Ohms) . pins 18 and 19 (2.4 to 4.2 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 (Ref. AMM TASK 73-21-50-000-046) and (Ref. AMM TASK 73-21-50-400-046).
 * If the resistance values are in the specified limits:
 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 B. 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-B) 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 bristle brush with stoddard solvent (Material No. CP2011) (Ref. AMM TASK 73-21-50-210-002).

 - connect the harness connector (TCC-B) to the sensor. Tighten the connector by hand plus one eighth of a turn. If necessary use soft nose pliers.

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