Diagnosis Item 4: Diagnose the terminator resistors.


caution When servicing a CAN bus line, earth yourself by touching a metal object such as an unpainted water pipe. If you fail to do, a component connected to the CAN bus line may be broken.










FUNCTION



TROUBLE JUDGEMENT CONDITIONS



PROBABLE CAUSES



  • Damaged harness wires and connectors
  • Malfunction of the ASTC-ECU
  • Malfunction of the combination meter

DIAGNOSIS PROCEDURE

STEP 1. Resistance measurement at D-223 ASTC-ECU connector.
caution A digital multimeter should be used. For details refer to .
(1)Remove the ASTC-ECU, and measure at the equipment side.
(2)Resistance at D-223 ASTC-ECU connector terminal Nos.83 and 84
OK: 120 ± 20 Ω

Q. Is the check result normal?
<Within 120 ± 20 Ω> Go to Step 2.
<Not within 120 ± 20 Ω> Replace the ASTC-ECU.

STEP 2. Resistance measurement at D-04 combination meter connector.
caution A digital multimeter should be used. For details refer to .
(1)Remove the combination meter, and measure at the equipment side.
(2)Resistance between D-04 combination meter connector terminal Nos.23 and 24
OK: 120 ± 20 Ω
caution Strictly observe the specified wiring harness repair procedure. For details refer to .

Q. Is the check result normal?
<Within 120 ± 20 Ω> Repair the wiring harness between the ASTC-ECU connector and the combination meter.
<Not within 120 ± 20 Ω> Replace the combination meter.