CONTROL SYSTEM — ECM Terminal Voltage Inspection (Incorrect Voltage / Possible Cause)
F2-149spec tableReferences diagnostic trouble code troubleshooting (codes 28, 29, 34). Fuel injectors 3Y/3Z apply to K8 V6.
NOTE
B+: Battery positive voltage
ECM Terminal — Incorrect Voltage / Possible Cause
3O
Incorrect voltageAlways 0V
Possible causeRefer to code No. 28 Troubleshooting (Refer to page F2-89)
3P
Incorrect voltageAlways 0V
Possible causeRefer to code No. 29 Troubleshooting (Refer to page F2-89)
3Q
Incorrect voltageAlways approx. 0V or B+
Possible causeRefer to code No. 34 Troubleshooting (Refer to page F2-90)
3R
Incorrect voltage—
Possible cause—
3S
Incorrect voltage—
Possible cause—
3T
Incorrect voltageAlways below 1.0V
Possible causeOpen or short circuit in wiring from fuel pump relay to ECM terminal 3T
3U
Incorrect voltageAlways 0V
Possible causeOpen or short circuit in wiring from fuel injector to ECM terminal 3U, 3V, 3W, 3X, 3Y or 3Z; Main relay malfunction (Refer to page F2-157)
3V
Incorrect voltageAlways 0V
Possible causeOpen or short circuit in wiring from fuel injector to ECM terminal 3U, 3V, 3W, 3X, 3Y or 3Z; Main relay malfunction (Refer to page F2-157)
3W
Incorrect voltageAlways 0V
Possible causeOpen or short circuit in wiring from fuel injector to ECM terminal 3U, 3V, 3W, 3X, 3Y or 3Z; Main relay malfunction (Refer to page F2-157)
3X
Incorrect voltageAlways 0V
Possible causeOpen or short circuit in wiring from fuel injector to ECM terminal 3U, 3V, 3W, 3X, 3Y or 3Z; Main relay malfunction (Refer to page F2-157)
3Y
Incorrect voltageAlways 0V
Possible causeOpen or short circuit in wiring from fuel injector to ECM terminal 3U, 3V, 3W, 3X, 3Y or 3Z; Main relay malfunction (Refer to page F2-157)
3Z
Incorrect voltageAlways 0V
Possible causeOpen or short circuit in wiring from fuel injector to ECM terminal 3U, 3V, 3W, 3X, 3Y or 3Z; Main relay malfunction (Refer to page F2-157)