DTC 70

DTC 70 Chart:

CIRCUIT DESCRIPTION
This diagnostic test monitors Manifold Absolute Pressure (MAP) an Throttle Position (TP) sensors. Engine operation requires that any large change in Throttle Position (TP) sensor must be followed by a change in Manifold Absolute Pressure (MAP). If MAP remains constant and there is a large change in TP sensor, PCM will set DTC 70.

DTC 70 WILL SET WHEN
- DTC 31,32 and 34 not set.
- Throttle angle changes more than 50 in 12.5 milliseconds (0.0125 sec.).
- MAP greater than 22 kPa.
- MAP not within 12 kPa of atmospheric pressure (BARO).
- Engine running.
- Low coolant level and engine overheat not present.
- Traction control not active.
- MAP change of3 kPa or less in 0.21 second following a 5 degree or greater change in throttle angle.

ACTION TAKEN (PCM WILL DEFAULT TO)
DTC 70 does not illuminate the Malfunction Indicator Lamp (MIL) (Service Engine Soon).

DTC 70 WILL CLEAR WHEN
The fault no longer exists.

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This check attempts to reset DTC 70 and store "Snapshot" data when the fault occurred.
2. Checking DTC 70 snapshot value is used to determine if an intermittent low voltage or an intermittent high voltage caused the DTC to set. An intermittent low voltage can be caused by an open or short to ground on CKT 417 or by an open in CKT 474 or the TP sensor itself.

An intermittent high voltage can be caused by an open in CKT 808 or a short to voltage on CKT 417.