(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:
 - disconnect the CJ13 connector (TCC-B) from the TCC sensor (3 O'Clock).

 - do a cleaning of the harness connector using a bristle brush with stoddard solvent (Material No. CP2011) (Ref. AMM TASK 73-21-50-210-002).

 - 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.
 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
 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 harness HJ13 (Ref. AMM TASK 73-21-50-000-046)
 and (Ref. AMM TASK 73-21-50-400-046).
 4_ 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).
 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.

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 (3) If the failure message TCC SNSR, J13, ECU on one or both channels is confirmed:
 (a) Disconnect the connector (TCC-B) 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:
_

 - replace the TCC sensor (Ref. AMM TASK 73-21-70-000-002) (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 14 and 4 (> 10 Megohms) . pin 14 and ground (> 10 Megohms).
 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:
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