ECM Communication Stop Mode: Procedure
- CHECK FOR OPEN IN CAN NO. 1 BUS MAIN WIRE (ECM MAIN WIRE)
- Turn the ignition switch off.
- Disconnect the ECM connector.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*a Front view of wire harness connector:
(to ECM)*b for 2AZ-FE *c for 2ZR-FE - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Switch Condition Specified Condition A37-41 (CANH) - A37-49 (CANL)*1 Ignition switch off 108 to 132 Ω A37-8 (CANH) - A37-9 (CANL)*2 Ignition switch off 108 to 132 Ω *1: for 2AZ-FE
*2: for 2ZR-FE
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- CHECK WIRE HARNESS (POWER SOURCE CIRCUIT)
- Check the ECM power source circuit. Refer to ECM Power Source Circuit
for 2ZR-FE. Refer to ECM Power Source Circuit
for 2AZ-FE).
Result
Result Proceed to OK (for 2ZR-FE) A OK (for 2AZ-FE) B NG C
B → See step 4
C → REPAIR OR REPLACE HARNESS OR CONNECTOR
A → See step 3
- Check the ECM power source circuit. Refer to ECM Power Source Circuit
for 2ZR-FE. Refer to ECM Power Source Circuit
for 2AZ-FE).
- REPLACE ECM. Refer to REMOVAL
- REPLACE ECM. Refer to REMOVAL