Engine Controls - DTC P0336 Manual Revision
TSB SB04-01-S003Revised DTC P0336 (Service Manual Revision)
(This Bulletin Supersedes SB03-01-S004)
ISSUE DATE: JULY 2004
Affected Vehicles
2003-2004 Isuzu Ascender (US) model equipped with 5.3L engine (VIN P).
Service Information
This bulletin is being revised to correct DTC P0336 information in the Engine Controls section of the Service Manual. Please disregard Isuzu bulletin SB03-01-S004 and replace the current information in the Service Manual with the information listed below. The following information has been updated in the Service Manual.
NOTE:
Information released on paper and electronic format prior to bulletin release cannot be updated.
DTC 036
Circuit Description
The crankshaft position (CKP) sensor signal indicates the crankshaft speed and position. The CKP sensor circuits are connected directly to the powertrain control module (PCM) and consists of the following circuits:
^ The 12-volt reference circuit
^ The low reference circuit
^ The CKP sensor signal circuit
^ If the PCM detects that the CKP sensor signal is inconsistent for 2 seconds, DTC P0336 sets.
Conditions for Running the DTC
The engine is cranking or running.
Conditions for Setting the DTC
The PCM detects that the CKP sensor signal is inconsistent for 2 seconds.
Action Taken When the DTC Sets
^ The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
^ The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
Conditions for Clearing the MIL/DTC
^ The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
^ A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
^ A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
^ Clear the MIL and the DTC with a scan tool.
DTC P0336
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