Operation CHARM: Car repair manuals for everyone.

A/T - G4A-EL Retrieving Trouble Codes: Overview

TECHNICAL BULLETIN # 188

TRANSMISSION: G4A-EL

SUBJECT: Trouble Codes

APPLICATION: Mazda

DATE: OCT 93

Mazda Trouble Codes - All Except '87 626

Trouble codes will be displayed by either the "HOLD" light, or in some cases, the "MIL" (check engine) light. If no problem exists, the "HOLD" or "Check Engine" light will come on for three (3) seconds after turning the key on, then it will go out. If a problem develops, the "HOLD" or "Mil" light will flash in a regular pattern as long as the problem persists. This is not a trouble code, just an indication to look for them. Make certain that either this, or the "no problem" flash occurs. Trouble codes will be retained in memory for later retrieval.

GETTING CODES

In order to get the codes, you have to locate the "Diagnostic Request" lead, and using a jumper wire hook it to a good ground.

The "Diagnostic Request" lead comes in several forms.

1. A single pin, single wire Blue connector.
2. A single pin, single wire Green connector.




3. One of the pins in an integrated "Diagnostic Connector".

Use the following information to find out which connector you need and where it is

323 90-91

The integrated "Diagnostic Connector" located behind the battery. Ground the TAT pin. The "HOLD" light flashes your codes.

92-93

The integrated "Diagnostic Connector" located behind the battery. May not have a TAT pin. If not, ground TEN pin. The "Check Engine" light flashes your codes.

626/MX6

88-89 ALL, 90-92 Turbo
Blue single pin connector. Behind dashboard to the left of the steering column coming out of transmission computer harness. "HOLD" light flashes your codes.

90-92 Non Turbo

Green single pin connector. Behind the left front shock tower. The "Check Engine" & light flashes your codes.

93 ALL

The integrated "Diagnostic Connector" in front of the left front shock tower. Ground the TAT pin. The "HOLD" light will flash your codes.

929 88-91

Blue single pin connector. Next to right side hood strut. The "HOLD" light flashes your codes.

92-93

Integrated "Diagnostic Connector". Near left front shock tower by air filter box. Ground TAT pin. "HOLD" light flashes your codes.

RX7 89-91

Blue single pin connector. In front of left front shock tower. "HOLD" light flashes your codes.

92-93

Integrated "Diagnostic Connector". Near left front shock tower. Ground TAT pin. "HOLD" light flashes your codes.

MPV Van - All

Blue single pin connector Under dash to the left of the steering column coming out of transmission computer harness. "HOLD" light flashes your codes.

CODE FORMAT

When the "Diagnostic Request" pin is grounded the appropriate light ("HOLD" or "Check Engine") will give you your trouble codes in long and Short flashes. long flashes (1.2 seconds) are the "tens" digit of a two digit code, short flashes (0.4 seconds) are the "ones" digit of a one or two digit code. The lowest number codes will be shown first, then the higher number codes will be shown in order. There is a four second "OFF" period between codes. The series of codes will repeat as long as the "Diagnostic Request" pin is grounded. If no codes are present when you ground this pin. the "HOLD" or "Check Engine" light will remain dark.

CLEARING CODES

Disconnect the battery negative post for at least seconds. All codes will be cleared.

CODE LIST

1. No Engine RPM signal from ECM.
6. No vehicle speed signal from the transmission VSS.
7. No vehicle speed signal from the speedometer VSS.
12. Throttle position sensor signal open or shorted.
55. No signal from "Drum Speed" pulse generator on trans.
56. No signal from ATF temperature sensor.
57. No "Shift Signal" from transmission controller. Bad controller.
60. "1-2" or "A" shift solenoid circuit open or shorted.
61. "2-3" or "B" shift solenoid circuit open or shorted.
62. "3-4" or "Overrun Clutch" solenoid circuit open or shorted
63. Lock-up solenoid circuit open or shorted.
64. Line pressure control solenoid circuit open or shorted.
65. Lock-up engagement control solenoid circuit open or shorted.