Solara Coupe V6-3.3L (3MZ-FE) (2008)
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NOTE: Do not reconnect the disconnected connectors until this inspection is complete because there may be a short to GND in 2 or more
CAN bus wires.
Result:
(c) When there is a short to GND in one or more of the bus wires connected to an ECU (or sensor):
(1) Reconnect all of the connectors to the No. 1 CAN J/C, except for the one that was disconnected last (the bus wire that is shorted to
GND). Check that the resistance shown on the tester is normal (200 Ohms or more) to confirm that there is a short to GND in one
branch wire only.
HINT:
-
The connectors connected to the No. 1 CAN J/C can be distinguished according to the color of the communication bus wires and the shape
of the connectors.
-
Reconnecting the connectors to non-specified positions on the No. 1 CAN J/C does not affect system operation. However, it is preferred to
reconnect the connectors to their specified positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to
make future maintenance easier.
NG -- REPLACE NO. 1 CAN J/C
OK -- Continue to next step.
4. RECONNECT CONNECTOR
(a) Reconnect the connector of the bus wire that is shorted to GND to the No. 1 CAN J/C (the connector that caused the bus wire resistance to
change to 200 Ohms or more when it was disconnected).
NEXT -- Continue to next step.
5. CHECK FOR SHORT TO GND IN CAN BUS WIRE
(a) Disconnect the connector that includes terminal CANH from the ECU (or sensor) to which the bus wire shorted to GND is connected (
See: Pinout Values and Diagnostic Parameters).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
HINT: If the resistance changes to 200 Ohms or higher when the connector is disconnected from the ECU (or sensor), there may be a short in
the ECU (or sensor).
NG -- REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS WIRE OR CONNECTOR
OK -- REPLACE CORRESPONDING ECU OR SENSOR
6. CHECK FOR SHORT TO GND IN CAN BUS WIRE
(a) Reconnect the CAN main bus wire connector (J22) to the No. 1 CAN J/C "A" side (with earth terminal).
(b) Disconnect the No. 2 CAN J/C connector (J18).
