Lexus ES: Hybrid Vehicle Control ECU Communication Stop Mode
DESCRIPTION
Detection Item | Symptom | Trouble Area |
Hybrid Vehicle Control ECU Communication Stop Mode | Any of the following conditions are met: -
Communication stop for "Hybrid Vehicle Control" is indicated on the "Communication Bus Check" screen of the Techstream.
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Communication stop history for "Hybrid Vehicle Control" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Hybrid Vehicle Control" is 6 or more.)
Click here -
Communication system DTCs (DTCs that start with U) that correspond to "Hybrid Vehicle Control ECU Communication Stop Mode" in "DTC Combination Table" are output.
Click here | -
Hybrid vehicle control ECU branch line or connector
-
Power source circuit of hybrid vehicle control ECU
-
Hybrid vehicle control ECU ground circuit
-
Hybrid vehicle control ECU
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
-
Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
-
When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.
PROCEDURE
1. | CHECK FOR OPEN IN CAN BUS LINES (HYBRID VEHICLE CONTROL ECU BRANCH LINE) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the G60 hybrid vehicle control ECU connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection | Condition | Specified Condition | G60-25(CA1H) - G60-24(CA1L) | Cable disconnected from negative (-) auxiliary battery terminal | 54 to 69 Ω | G60-31(CA3P) - G60-30(CA3N) | Cable disconnected from negative (-) auxiliary battery terminal | 54 to 69 Ω | | | *a | Front view of wire harness connector (to Hybrid Vehicle Control ECU) | | |
NG | | REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (HYBRID VEHICLE CONTROL ECU) |
OK | | |
2. | CHECK ECU POWER SOURCE CIRCUIT |
(a) Check the ECU power source circuit.
Click here
OK | | REPLACE HYBRID VEHICLE CONTROL ECU |
NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
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