101
Fuel Sensor (FUEL)
WT545
Display: Fuel level signal from the fuel level sensor.
DTC: C1400, C1401, C1402
Usage: Check output of the fuel level sensor.*
1. Full fuel is indicated by a reading of 0-5 ohms.
2. Empty is indicated by a reading of 95-105 ohms.
* 110-500 ohms, suspect the fuel level sensor or wiring. 0-100 ohms but
no gauge indication, suspect the gauge.
Tachometer (RPM)
WT544
Display: Engine RPM
DTC: P0336, P0337, P0339
Usage: Verify engine speed signal from the following.
1. CKP (crankshaft position) sensor to ECM
2. ECM (CAN) signal to gauge (tachometer)
Speedometer (SPEED)
WT543
Display: Vehicle speed signal.
DTC: P0500
Usage: Verify speedometer sensor signal from the fol-
lowing.
1. Speed sensor to ECM.
2. ECM (CAN) signal to gauge (speedometer/odometer).
DIAGNOSTIC TROUBLE CODES
(DTC)
If an EFI or related chassis component fails or an out-of-
tolerance signal is detected by the ECM, a diagnostic trou-
ble code (DTC) will be generated in the ECM and dis-
played on the LCD. The DTC will be displayed alternately
with a wrench icon or malfunction indicator light (MIL).
The DTC will continue to flash until the malfunction is
corrected and the code cleared.
Code List
NOTE: Each of the following numerical codes will
have a one-letter prefix of C, P, or U. A “C” prefix
denotes a chassis malfunction, a “P” prefix denotes a
power train malfunction, and a “U” prefix denotes a
loss of communication with the gauge.
NOTE: Normal malfunction codes are cleared from
the LCD when the component is replaced or the mal-
function is corrected; however, intermittent codes
must be cleared as noted in the code chart.
Code
Fault Description
Possible Cause
Fault Recovery
C0063 Tilt Sensor Circuit High
Sensor or interconnect harness shorted to battery power
Correct condition*
C0064 Tilt Sensor Circuit Low/SG/Open
Sensor or interconnect harness open or shorted to chassis ground
Correct condition*
C1263 Backup/Reverse-Light Circuit Open
Bulb has failed or is disconnected or interconnect harness is open
Correct condition*
C1264 Backup/Reverse-Light Circuit High
Bulb has failed or is disconnected or interconnect harness shorted to
battery power
Correct condition*
C1265 Backup/Reverse-Light Circuit Low/SG
Bulb has failed or is disconnected or interconnect harness shorted to
chassis ground
Correct condition*
P0030 O2 Heater Intermittent/Open
Heater or interconnect harness is intermittent or open
Correct condition*
P0031 O2 Heater Low/SG
Heater or interconnect harness shorted to chassis ground
Correct condition*
P0032 O2 Heater High/SP
Heater or interconnect harness shorted to battery power
Correct condition*
P0107 MAP Sensor Circuit Low/SG/Open
Sensor or interconnect harness shorted to chassis ground
Correct condition*
P0108 MAP Sensor Circuit High/SP
Sensor or interconnect harness shorted to battery power
Correct condition*
P0112 Intake Air Temp Sensor Circuit Low/SG
Sensor or interconnect harness shorted to chassis ground
Correct condition*
P0113 Intake Air Temp Sensor Circuit High/Open
Sensor or interconnect harness open or shorted to battery power
Correct condition*
P0114 Intake Air Temp Sensor Circuit Intermittent
Sensor or interconnect harness intermittent
Correct condition*
P0116 ECT Sensor Circuit Range/Performance
Sensor producing an out-of-range voltage
Correct condition*