Component Inspection
1.

Check resistance

(1)

Ignition "OFF" & Engine "OFF".

(2)

Disconnect TCM connector.

(3)

Measure resistance between terminal 3 and 4 of TCM harness connector.

Specification

Not TCS, 4WD

TCS, 4WD

ECM & TCM connected

ECM connected only

TCM connected only

ECM & TCM connected

60Ω ± 1Ω

120Ω ± 2Ω

120Ω ± 2Ω

120Ω ± 2Ω

(4)

Is the measured resistance within specifications ?

YES

▶ Go to "Check signal waveform" as below.

NO

▶ Substitute with a known-good ECM and check for proper operation.

If the problem is corrected, replace ECM and then go to "Verification of Vehicle Repair" procedure.

2.

Check signal waveform

(1)

Ignition "OFF" & Engine "OFF".

(2)

Disconnect ECM connector.

(3)

Monitor signal waveform at terminal 3 and 4 of TCM connector simultaneously.

(4)

Are CAN signals generated correctly ?

YES

▶ Thoroughly check connectors for looseness, poor connection,bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

NO

▶ Substitute with a known-good ECM and check for proper operation.

If the problem is corrected, replace ECM and then go to "Verification of Vehicle Repair" procedure.

Яндекс.Метрика