Subsection 01 (ELECTRONIC FUEL INJECTION (EFI))
Testing the ECM Power Supply
REQUIRED TOOL
ECM ADAPTER TOOL
(P/N 529 036 166)
FLUKE 115 MULTIMETER
(P/N 529 035 868)
1. Disconnect ECM connector.
2. Install the ECM adapter tool on the ECM con-
nector.
3. Install a jumper wire between K1 and M4 on the
ECM adapter tool.
4. Turn the ignition switch to ON.
5. Set emergency engine stop switch to RUN.
6. Set multimeter to Vdc and check for voltage as
follows.
ECM
ADAPTER
BATTERY
VOLTAGE
L1
Negative post
Battery voltage
If voltage is not measured, check the following:
– ECM fuse
– Main relay
– Wiring and connections, refer to the
WIRING
DIAGRAM
.
Testing the Continuity of ECM Ground
Circuits
1. Disconnect ECM connector.
2. Install the ECM adapter tool on ECM connector.
3. Set multimeter to
and probe adapter termi-
nals as per following table.
ECM
ADAPTER
BATTERY
POST
RESISTANCE
Pins M3 and
M4
Ground
Close to 0
(continuity)
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If any measurement is out of specification, refer to
POWER DISTRIBUTION
and check all grounds.
Testing the CAN Resistor
Remove the DPS1 connector (4-pin connector)
from DPS module (if so equipped). Refer to
STEERING SYSTEM
subsection.
1. Remove seat to access the diagnostic link con-
nector (DB).
2. Remove diagnostic link connector from its
holder.
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1. Diagnostic link connector (DB)
3. Set a multimeter to
setting.
4. Measure the resistance of the CAN resistors as
per following table.
CAN RESISTOR TEST
DIAGNOSTIC LINK
CONNECTOR
RESISTANCE
Pins 1 and 2
Approximately 60
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