826785 Volvo.Penta Washer

Table 1
J1939 Code and Description Comments
29-3
Accelerator Pedal Position #2 : Voltage Above Normal The Electronic Control Module (ECM) detects signal voltage that is not in the acceptable range.
The ECM flags the throttle position as invalid data and a default value is used. The engine speed is limited to high idle.
The code is logged.
29-4
Accelerator Pedal Position #2 : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The ECM flags the throttle position as invalid data and a default value is used. The engine speed is limited to high idle.
The code is logged.
91-3
Accelerator Pedal Position #1 : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The ECM flags the throttle position as invalid data and a default value is used. The engine speed is limited to high idle.
The code is logged.
91-4
Accelerator Pedal Position #1 : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The ECM flags the throttle position as invalid data and a default value is used. The engine speed is limited to high idle.
The code is logged.
91-8
Accelerator Pedal Position #1 : Abnormal Frequency, Pulse Width, or Period The ECM detects signal voltage that is not in the acceptable range.
The ECM flags the throttle position as invalid data and a default value is used. The engine speed is limited to high idle.
The code is logged.
974-5
Remote Accelerator Pedal Position : Current Below Normal The code is logged.
974-6
Remote Accelerator Pedal Position : Current Above Normal The code is logged. For this troubleshooting procedure, the desired speed input configuration parameter can be set to 4 mA to 20 mA input, PWM input, or 0 V to 5 V input. The Electronic Control Module (ECM) will only monitor the status of the input signal for the PWM and 0 V to 5 V desired speed inputs. The ECM does not supply the power and ground for the PWM or 0 V to 5 V speed control circuits.If using the Operator Control Panel (OCP) 0 V to 5 V analog output or the PWM speed control feature, then the OCP will monitor the status of those outputs in relation to power and ground circuit health. If an external speed control source device is used, refer to that devices troubleshooting procedure. If using the OCP CAN desired speed input, refer to troubleshooting procedure Troubleshooting, Data Link-Test.The value of the current, frequency, or voltage corresponds to a range of desired engine speeds between minimum high idle and maximum high idle. The "Minimum Engine High Idle Speed" and the "Maximum Engine High Idle Speed" are set with the "Service/Configuration" screen of Cat® Electronic Technician (ET). For more information, refer to Troubleshooting, Configuration Parameters.When the idle/rated speed switch is in the RATED position, a current value of 4.0 mA, 5 percent duty cycle, or 0.5 V corresponds to the programmed "Minimum Engine High Idle Speed". A current value of 20.0 mA, 95 percent duty cycle, or 4.5 V corresponds to "Maximum Engine High Idle Speed". Current values within this range will vary the desired engine speed in a linear fashion between. The range will vary between "Minimum Engine High Idle Speed" and "Maximum Engine High Idle Speed".
Illustration 1 g06026342
PWM circuit
Illustration 2 g06026354
mA and V circuit
Table 2
Troubleshooting Test Steps Values Results
1. Inspect the Electrical Connectors and the Wiring
A. Turn the main disconnect switch to the OFF position.
B. Thoroughly inspect the connectors. Refer to Troubleshooting, "Electrical Connectors-Inspect" for additional information.
C. Perform a 45 N (10 lb) pull test on the connector wires.
D. Check the harness for abrasions and pinch points.
Connectors and Wiring
Result: The connectors and wiring appear to be OK.
Proceed to Test Step 2.
Result: There is a problem with the connectors and/or wiring.
Repair: Repair or replace the connectors or wiring. Ensure that all the seals are properly in place and ensure that the connectors are coupled.
If the problem is not resolved, proceed to Test Step 2.
2. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is active or logged.
Codes
Result: A 29-3, 91-3, or 91-8 code is active or logged.
Proceed to Test Step 3.
Result: A 974-5 code is active or logged.
Proceed to Test Step 4.
Result: A 29-4, 91-4, or 974–6 code is active or logged.
Proceed to Test Step 5.
3. Check the Wiring for an Open Circuit
A. Turn the main disconnect switch to the OFF position.
B. Remove the signal wire at the Engine Interface Connector (EIC) that supplies the PWM or analog 0 V to 5 V desired speed input signal to the Electronic Control Module (ECM).
C. Disconnect the P1 and P2 connector from the ECM.
D. Measure the resistance across the following wiring harness connector terminals:
- A 29-3 code: ECM P2-94 and Terminal 15 (customer connector terminal block #1
- A 91-3 or 91-8 code: ECM P1-66 and Terminal 66 (customer connector terminal block #1
Open Circuit
Result: There are less than 10 ohms of resistance.
Repair: The wiring is OK. There may be a problem with the speed control signal after the customer connector. For information on, refer to the Original Equipment Manufacturers (OEM) service information.
If the problem is not resolved , proceed to Test Step 5
Result: There were more than 10 ohms of resistance.
Repair: An open circuit has been detected. Repair or replace the wiring harness.
Verify that the repair eliminated the problem.
4. Check the Wiring for an Open Circuit
A. Turn the main disconnect switch to the OFF position.
B. Remove the wires for the desired speed and the return from terminal strip terminals 85 and 86. Install a jumper wire between the wires for the desired speed and the return that were removed from