ECM SYSTEM
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, DM
1-204
(18) 5 V External (DTC 642, 643, 652, 653, 1611)
DTC 642-Sensor Supply Voltage 1 Low (5 Vext1)
• Hardware: External Sensor Supply Voltage Regulator 1
• Enabling Conditions: Key On, Engine Off or Running
• Fault Condition- Voltage feedback on sensor supply circuit #1 below 4.60 V for longer than 1 second
• Corrective Action(s)- Illuminate MIL and disable fuel adaptive learn while code is active
• Non-emissions related fault
• Possible Causes: Internal short to ground in any sensor fed by 5 Vext1 supply, 5 Vext1 shorted to ground in wire
harness, faulty ECM (no 5 V output on 5 Vext1)
DTC 643-Sensor Supply Voltage 1 High (5 Vext1)
• Hardware: External Sensor Supply Voltage Regulator 1
• Enabling Conditions: Key On, Engine Off and Running
• Set Conditions: Voltage feedback on sensor supply circuit #1 is greater than 5.40 V for longer than 1 second
• Corrective Action(s): Illuminate MIL and disable fuel adaptive learn while code is active
• Non-emissions related fault
• Possible Causes: 5 Vext1 circuit shorted to 12.0 V in wire harness
DTC 652-Sensor Supply Voltage 2 Low (5 Vext2)
• Hardware: External Sensor Supply Voltage Regulator 2
• Enabling Conditions: Key On, Engine Off or Running
• Fault Condition- Voltage feedback on sensor supply circuit #2 below 4.60 V for longer than 1 second
• Corrective Action(s)- Illuminate MIL and disable fuel adaptive learn while code is active
• Non-emissions related fault
• Possible Causes: Internal short to ground in any sensor fed by 5 Vext2 supply, 5 Vext2 shorted to ground in wire
harness, faulty ECM (no 5 V output on 5 Vext2)
DTC 653-Sensor Supply Voltage 2 High (5 Vext2)
• Hardware: External Sensor Supply Voltage Regulator 2
• Enabling Conditions: Key On, Engine Off and Running
• Set Conditions: Voltage feedback on sensor supply circuit #2 is greater than 5.40 V for longer than 1 second
• Corrective Action(s): Illuminate MIL and disable fuel adaptive learn while code is active
• Non-emissions related fault
• Possible Causes: 5 Vext2 circuit shorted to 12.0 V in wire harness
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