TM 5-3805-291-23-1
ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0013 00
ENGINE SPEED/TIMING SENSOR CALIBRATION - CONTINUED
5.
Start engine and check for diagnostic codes
a.
Connect ET to diagnostic connector (WP 0005 00).
b.
Start engine and run engine until engine is at normal operating temperature (TM 5-3805-291-10).
c.
Check for active diagnostic codes. Wait at least 30 seconds in order for codes to become active.
N OT E
Engine must not have any active diagnostic codes during timing calibration except for a 261-13 Engine
Timing Calibration required.
Expected Results. There are no active diagnostic codes or there is only an active 261-13 diagnostic code.
d.
(1)
If results are OK, proceed to step 6.
(2)
If results are not OK, troubleshoot and repair any active diagnostic codes before you continue with this
procedure.
6.
Calibrate engine speed/timing sensor.
a.
Set engine speed to 1,100 50 rpm. Engine speed must be steady within this rpm range for calibration to be suc-
cessful.
b.
After engine has warmed up, access "Timing Calibration" screen on ET. Access these display screens in this order:
(1)
Service
(2)
Calibrations
(3)
Timing Calibration
c.
To calibrate timing, select "Continue" on ET. Wait until ET indicates timing is calibrated.
Expected Results. ET indicates that timing is calibrated.
d.
(1)
If results are OK, perform this procedure:
(a) Set engine speed to low idle.
N OT E
Disconnect 7X-1695 Cable Assembly before you exit "Timing Calibration" screen. Otherwise, diagnostic
codes may be activated.
(b) Disconnect 7X-1695 Cable Assembly.
(c) Exit "Timing Calibration" screen on ET.
(d) Place battery disconnect switch in OFF position (TM 5-3805-291-10).
(e) Remove transducer and remove adapter.
(f) Install plug into timing calibration port.
(2)
If results are not OK, perform these checks:
(a) If crankshaft and camshaft gears have been reassembled incorrectly, timing will not calibrate.
(b) Verify timing calibration probe is installed correctly.
(c) Verify engine speed is correct and engine speed is stable.
(d) If engine speed is unstable, refer to Troubleshooting, Engine Misfires, Runs Rough, or is Unstable
(e) There may be a problem with transducer or with cables. Obtain a new transducer and/or new cable and
repeat timing calibration.
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