Checking Power and Ground Terminal - Engine Management System

Checking engine control module (ECM) power supply and ground terminal

Checking engine control module (ECM) power supply and ground terminal

Checking power supply
- Check fuse 11 B/18. If the fuse is blown check the circuit after the fuse for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
- Check fuse 11/B14. If the fuse is blown check the circuit after the fuse for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Check power supply to #A70. Voltage should be approximately battery voltage.
- Check power supply to #B11. Voltage should be approximately battery voltage.

Checking ground terminal
- Check ground lead between engine control module (ECM) #A53, #A54, #A63 and right side member ground terminal 31/96 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
- Check engine control module (ECM) ground terminal for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Remedy as necessary

Other information
- To connect the breakout box, see Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box
- Power supply to the engine control module (ECM) #A70 is from fuse 11 B/18 via the system relay.
- Power supply to engine control module (ECM) #B11 is from fuse 11 B/14 via terminal 30+.
- The engine control module (ECM) ground terminal is common to engine control module (ECM) terminals #A53, #A54 and #A63.
- For further information about the location of ground terminals on the B52X4 T, see Location of components Locations , B6304 S, see Location of components Locations or B6284 T, see Location of components Locations.
- For information about signals, see Signal specification. Pinout Values and Diagnostic Parameters
- For information about circuit see the relevant wiring diagram





Was a fault detected?

Yes - Fault Found

No - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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Attempt New Test - Checking engine control module (ECM) power supply and ground terminal

FAULT-TRACING FAILED - FAULT-TRACING FAILED

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