P1634
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE.
Voltage Supply Group 1. Short to Ground.
Fault symptoms
On-Board Diagnostics
Type of diagnosis:
Enable criteria:
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Battery voltage should be 10.2-15.8 V.
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Fault criteria:
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Voltage on pin 26 falls below 3.9 V for more than 0.3 s.
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Dependents:
System reaction to a fault:
OK report:
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Voltage on pin 26 exceeds 3.9 V fore more than 0.3 s.
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Fault handling:
(See section
Fault handling III, other emissions-related components and functions
for more information)
Diagnostic help
The diagnosis concerns an electrical fault on the voltage output to pedal potentiometer 2 and the mass air flow sensor.
Checking the wiring
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.
