P1653
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE.
Engine will not start.
Engine turns off.
Main Relay Circuit. Voltage Drops too Late.
Fault symptoms
On-Board Diagnostics
Type of diagnosis:
Enable criteria:
Fault criteria:
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The voltage on the input is greater than 20% of the battery voltage for more than 2.1 s. (Battery voltage x 0.2 = fault criterion.)
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Dependents:
System reaction to a fault:
OK report:
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The voltage on the input is less than 20% of the battery voltage for more than 2.1 s. (Battery voltage x 0.2 = fault criterion.)
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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 lead between control module pins 1, 2, 76 and the main relay.
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.
