3835-ECU Power stages: Throttle valve actuator power stage: SRC
low
Context:
The engine control unit (ECU) monitors the electrical signal of the throttle valve actuator (TVA) position sensor.
Cause:
The signal circuit is below 0.0 V.
Possible failure modes:
1. Faulty wiring.
2. Faulty TVA sensor.
Solution:
1. Verify the fault code is still present and in an active state.
A. If the fault is no longer active or present, check for an intermittent fault.
B. If the fault is still present and active, continue with step 2.
2. Place the key switch OFF. Check the wiring harness from the TVA sensor to the ECU. Inspect all connectors, pins,
and wiring harness for broken connectors, corrosion, bent pins or wire breaks.
A. If any damage is found, repair or replace connections, pins, or wiring.
B. If no damage is found, reconnect the wiring harness to the sensor. Continue with step 3.
3. Place the key switch OFF. Disconnect the wiring harness from the TVA sensor at connector X-470 and the ECU
at connector X-016. Use a multi-meter to check for continuity from the harness side of connector:
X-016 pin 8 to chassis ground
X-016 pin 53 to chassis ground
X-016 pin 37 to chassis ground
There should be no continuity.
A. If there is no continuity, the wiring harness is in good condition. Replace the TVA sensor.
B. If there is continuity, there is a short circuit to ground condition in the wiring harness. Locate and repair damaged
wiring.
Mechanical Units
Wire harnesses - Electrical schematic sheet 07 (55.100.DP-C.20.E.07)
EH Units
Wire harnesses - Electrical schematic sheet 06 (55.100.DP-C.20.E.06)
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