Zenith C-30HDG 30HDG Pump Engine Fault Codes, Malfunction Indicator Diagnostic System, Example

C-30HDG PUMP — ENGINE FAULT CODES

Malfunction Indicator Diagnostic System

The Mayco C-30HDG concrete pump features an engine malfunction indicator lamp found on the control box (Figure 32). When a malfunction in the operation of the engine is detected, the orange check engine light will illuminate.

There are 2 methods of determining an engine malfunction. The first method is to connect a computer to the test port connector, the second method is to connect a ground wire to the Communication Port A connector using the check engine indicator lamp on the control box to determine the error code.The indicator lamp will flash in sequence to indicate an error code. Use the Diagnostic Error Code Table (Table 7) to troubleshoot the malfunction.The second method will be discussed in this manual. The following steps use the MAP sensor as an example so that the user may become familiar with the troubleshooting process.

Example:

1. Open hood and disconnect MAP sensor connector. See Figure 31.

Figure 31. MAP Sensor Connector

2.Close hood and start engine. Let engine run for 3 to 5 minutes.

3.Verify that check engine warning lamp on the control box is on (lit). See Figure 32.

T
H
R
O
T
T	HIGH	LOW				EMERGENCY
L
E	CHECK
	ENGINE		HOOD			STOP
			OPEN
					IGN
						ITIO
						OFF	N S
								WIT
								ON	CH
CHECK
	ENGINE	HOURS						START
ENGINE
			PU
WARNING			MPING	OFF
			ON
			REMOTE	CONTROL
LAMP					PUMP	RE
					ON	OUTLET
								MOTE

6.Connect a jumper wire between the brown/white wire (pin A) on the com. port A connector and chassis ground. See

Figure 34.

Figure 34. Com. Port A Connector/Jumper

7. Close hood and place ignition key in the ON position

IGNITION	SWITCH
OFF
	ON
	START

Figure 35. Ignition Key (On)

8.Observe check engine warning lamp flashing 3 consecutive times and repeating 3 times. This 1-1-1 sequence is defined as the leader code.

Figure 36. Leader Code

9.The check engine warning lamp will flash in 3 separate bursts as shown below. This sequence of lamp flashing represents the MIL flash error code. See Table 7 for a complete listing of error codes. In the MAP sensor example,

the error code is 127.

Figure 32. Engine Warning Lamp

4.If the check engine warning lamp is on, stop engine. Place ignition key in the OFF position. See Figure 33.

IGNITION	SWITCH
OFF
	ON
	START

Figure 33. Ignition Key (Off)

5.Locate communication port A test connector as shown in Figure 34. Remove plastic cover so that the male connector

pins are exposed.

Figure 37. MIL Flash Error Code

10.To correct MAP sensor error, remove jumper wire, reconnect MAP sensor connector (See Figure 31) and restart engine. It may be necessary to restart and stop the engine a few times in order to clear the error from the check engine warning lamp. Allow engine to run 3 to 5 minutes.

PAGE 50 — MAYCO C-30HDG PUMP — OPERATION AND PARTS MANUAL — REV. #6 (04/02/12)